java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label10_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:32:08,120 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:32:08,123 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:32:08,139 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:32:08,140 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:32:08,141 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:32:08,142 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:32:08,144 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:32:08,146 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:32:08,146 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:32:08,147 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:32:08,148 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:32:08,148 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:32:08,149 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:32:08,150 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:32:08,151 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:32:08,152 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:32:08,154 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:32:08,156 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:32:08,158 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:32:08,159 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:32:08,160 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:32:08,163 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:32:08,163 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:32:08,163 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:32:08,164 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:32:08,165 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:32:08,166 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:32:08,167 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:32:08,168 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:32:08,168 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:32:08,169 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:32:08,172 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:32:08,196 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:32:08,199 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:32:08,200 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:32:08,200 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:32:08,201 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:32:08,201 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:32:08,201 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:32:08,202 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:32:08,202 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:32:08,202 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:32:08,202 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:32:08,202 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:32:08,203 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:32:08,203 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:32:08,203 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:32:08,203 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:32:08,203 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:32:08,203 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:32:08,205 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:32:08,205 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:32:08,205 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:32:08,205 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:32:08,205 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:32:08,206 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:32:08,206 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:32:08,206 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:32:08,206 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:32:08,206 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:32:08,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:32:08,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:32:08,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:32:08,273 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:32:08,273 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:32:08,274 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label10_true-unreach-call.c [2018-10-24 16:32:08,335 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5f030cbea/61c9738d182741ed81835946f9acc590/FLAGcfc8c2a9b [2018-10-24 16:32:09,035 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:32:09,036 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label10_true-unreach-call.c [2018-10-24 16:32:09,056 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5f030cbea/61c9738d182741ed81835946f9acc590/FLAGcfc8c2a9b [2018-10-24 16:32:09,071 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5f030cbea/61c9738d182741ed81835946f9acc590 [2018-10-24 16:32:09,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:32:09,084 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:32:09,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:32:09,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:32:09,090 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:32:09,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:32:09" (1/1) ... [2018-10-24 16:32:09,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4dd763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:09, skipping insertion in model container [2018-10-24 16:32:09,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:32:09" (1/1) ... [2018-10-24 16:32:09,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:32:09,202 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:32:09,983 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:32:09,989 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:32:10,279 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:32:10,302 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:32:10,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10 WrapperNode [2018-10-24 16:32:10,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:32:10,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:32:10,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:32:10,305 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:32:10,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:32:10,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:32:10,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:32:10,731 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:32:10,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... [2018-10-24 16:32:10,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:32:10,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:32:10,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:32:10,980 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:32:10,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:32:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:32:11,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:32:11,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:32:19,844 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:32:19,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:32:19 BoogieIcfgContainer [2018-10-24 16:32:19,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:32:19,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:32:19,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:32:19,850 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:32:19,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:32:09" (1/3) ... [2018-10-24 16:32:19,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462be6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:32:19, skipping insertion in model container [2018-10-24 16:32:19,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:32:10" (2/3) ... [2018-10-24 16:32:19,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462be6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:32:19, skipping insertion in model container [2018-10-24 16:32:19,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:32:19" (3/3) ... [2018-10-24 16:32:19,854 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label10_true-unreach-call.c [2018-10-24 16:32:19,865 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:32:19,874 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:32:19,892 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:32:19,931 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:32:19,932 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:32:19,932 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:32:19,932 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:32:19,932 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:32:19,932 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:32:19,932 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:32:19,933 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:32:19,933 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:32:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-24 16:32:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 16:32:19,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:19,971 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] [2018-10-24 16:32:19,974 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:19,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1433927590, now seen corresponding path program 1 times [2018-10-24 16:32:19,982 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:19,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:20,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:20,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:20,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:20,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:20,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:32:20,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:20,325 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-24 16:32:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:29,785 INFO L93 Difference]: Finished difference Result 1474 states and 2723 transitions. [2018-10-24 16:32:29,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:29,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-10-24 16:32:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:29,819 INFO L225 Difference]: With dead ends: 1474 [2018-10-24 16:32:29,819 INFO L226 Difference]: Without dead ends: 1042 [2018-10-24 16:32:29,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-10-24 16:32:29,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2018-10-24 16:32:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-10-24 16:32:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1638 transitions. [2018-10-24 16:32:29,951 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1638 transitions. Word has length 35 [2018-10-24 16:32:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:29,952 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1638 transitions. [2018-10-24 16:32:29,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1638 transitions. [2018-10-24 16:32:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-24 16:32:29,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:29,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:29,957 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:29,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:29,958 INFO L82 PathProgramCache]: Analyzing trace with hash 143148094, now seen corresponding path program 1 times [2018-10-24 16:32:29,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:29,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:29,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:29,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:29,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:30,261 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:30,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:30,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:30,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:30,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:30,264 INFO L87 Difference]: Start difference. First operand 1040 states and 1638 transitions. Second operand 4 states. [2018-10-24 16:32:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:37,376 INFO L93 Difference]: Finished difference Result 3887 states and 6230 transitions. [2018-10-24 16:32:37,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:37,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2018-10-24 16:32:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:37,392 INFO L225 Difference]: With dead ends: 3887 [2018-10-24 16:32:37,393 INFO L226 Difference]: Without dead ends: 2849 [2018-10-24 16:32:37,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2018-10-24 16:32:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2844. [2018-10-24 16:32:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2018-10-24 16:32:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 4039 transitions. [2018-10-24 16:32:37,477 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 4039 transitions. Word has length 101 [2018-10-24 16:32:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:37,478 INFO L481 AbstractCegarLoop]: Abstraction has 2844 states and 4039 transitions. [2018-10-24 16:32:37,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 4039 transitions. [2018-10-24 16:32:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-24 16:32:37,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:37,492 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:37,493 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:37,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:37,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1603232273, now seen corresponding path program 1 times [2018-10-24 16:32:37,494 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:37,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:37,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:37,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:37,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 65 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-24 16:32:38,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:32:38,208 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:32:38,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:38,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:32:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:38,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:32:38,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:32:38,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:38,493 INFO L87 Difference]: Start difference. First operand 2844 states and 4039 transitions. Second operand 4 states. [2018-10-24 16:32:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:44,485 INFO L93 Difference]: Finished difference Result 10857 states and 15533 transitions. [2018-10-24 16:32:44,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:44,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2018-10-24 16:32:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:44,522 INFO L225 Difference]: With dead ends: 10857 [2018-10-24 16:32:44,522 INFO L226 Difference]: Without dead ends: 8015 [2018-10-24 16:32:44,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8015 states. [2018-10-24 16:32:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8015 to 4646. [2018-10-24 16:32:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4646 states. [2018-10-24 16:32:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 6263 transitions. [2018-10-24 16:32:44,640 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 6263 transitions. Word has length 247 [2018-10-24 16:32:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:44,644 INFO L481 AbstractCegarLoop]: Abstraction has 4646 states and 6263 transitions. [2018-10-24 16:32:44,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 6263 transitions. [2018-10-24 16:32:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-24 16:32:44,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:44,653 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:32:44,653 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:44,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:44,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1545197573, now seen corresponding path program 1 times [2018-10-24 16:32:44,655 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:44,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:44,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:44,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:44,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 16:32:45,444 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:45,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:45,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:32:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:32:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:32:45,446 INFO L87 Difference]: Start difference. First operand 4646 states and 6263 transitions. Second operand 5 states. [2018-10-24 16:32:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:52,468 INFO L93 Difference]: Finished difference Result 11092 states and 14512 transitions. [2018-10-24 16:32:52,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:52,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2018-10-24 16:32:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:52,498 INFO L225 Difference]: With dead ends: 11092 [2018-10-24 16:32:52,498 INFO L226 Difference]: Without dead ends: 6448 [2018-10-24 16:32:52,506 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 [2018-10-24 16:32:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2018-10-24 16:32:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 6147. [2018-10-24 16:32:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6147 states. [2018-10-24 16:32:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7862 transitions. [2018-10-24 16:32:52,611 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7862 transitions. Word has length 315 [2018-10-24 16:32:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:52,612 INFO L481 AbstractCegarLoop]: Abstraction has 6147 states and 7862 transitions. [2018-10-24 16:32:52,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:32:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7862 transitions. [2018-10-24 16:32:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-10-24 16:32:52,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:52,623 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:52,623 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:52,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1783853203, now seen corresponding path program 1 times [2018-10-24 16:32:52,624 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:52,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:52,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:52,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:52,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:53,174 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:53,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:53,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:53,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:53,176 INFO L87 Difference]: Start difference. First operand 6147 states and 7862 transitions. Second operand 4 states. [2018-10-24 16:33:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:00,023 INFO L93 Difference]: Finished difference Result 15298 states and 20011 transitions. [2018-10-24 16:33:00,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:33:00,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 389 [2018-10-24 16:33:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:00,062 INFO L225 Difference]: With dead ends: 15298 [2018-10-24 16:33:00,063 INFO L226 Difference]: Without dead ends: 9153 [2018-10-24 16:33:00,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:33:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2018-10-24 16:33:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 9150. [2018-10-24 16:33:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9150 states. [2018-10-24 16:33:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 11448 transitions. [2018-10-24 16:33:00,203 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 11448 transitions. Word has length 389 [2018-10-24 16:33:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:00,203 INFO L481 AbstractCegarLoop]: Abstraction has 9150 states and 11448 transitions. [2018-10-24 16:33:00,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:33:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 11448 transitions. [2018-10-24 16:33:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2018-10-24 16:33:00,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:00,217 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:00,218 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:00,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash -140913389, now seen corresponding path program 1 times [2018-10-24 16:33:00,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:00,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:00,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:00,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:00,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 384 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 16:33:01,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:33:01,158 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:33:01,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:01,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-24 16:33:01,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:33:01,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 16:33:01,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:33:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:33:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:33:01,645 INFO L87 Difference]: Start difference. First operand 9150 states and 11448 transitions. Second operand 8 states. [2018-10-24 16:33:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:10,193 INFO L93 Difference]: Finished difference Result 22668 states and 27579 transitions. [2018-10-24 16:33:10,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:33:10,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 465 [2018-10-24 16:33:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:10,213 INFO L225 Difference]: With dead ends: 22668 [2018-10-24 16:33:10,213 INFO L226 Difference]: Without dead ends: 9445 [2018-10-24 16:33:10,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 468 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:33:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2018-10-24 16:33:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9145. [2018-10-24 16:33:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9145 states. [2018-10-24 16:33:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9145 states to 9145 states and 10683 transitions. [2018-10-24 16:33:10,348 INFO L78 Accepts]: Start accepts. Automaton has 9145 states and 10683 transitions. Word has length 465 [2018-10-24 16:33:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:10,348 INFO L481 AbstractCegarLoop]: Abstraction has 9145 states and 10683 transitions. [2018-10-24 16:33:10,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:33:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 9145 states and 10683 transitions. [2018-10-24 16:33:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2018-10-24 16:33:10,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:10,363 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:10,364 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:10,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1737612351, now seen corresponding path program 1 times [2018-10-24 16:33:10,364 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:10,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:10,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:10,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:10,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:11,117 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:33:11,718 WARN L179 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-24 16:33:12,157 WARN L179 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2018-10-24 16:33:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 264 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-24 16:33:12,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:33:12,995 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:33:13,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:13,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 16:33:13,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:33:13,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-24 16:33:13,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:33:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:33:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:33:13,386 INFO L87 Difference]: Start difference. First operand 9145 states and 10683 transitions. Second operand 9 states. [2018-10-24 16:33:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:24,832 INFO L93 Difference]: Finished difference Result 18706 states and 21787 transitions. [2018-10-24 16:33:24,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:33:24,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 541 [2018-10-24 16:33:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:24,851 INFO L225 Difference]: With dead ends: 18706 [2018-10-24 16:33:24,851 INFO L226 Difference]: Without dead ends: 9563 [2018-10-24 16:33:24,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 545 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:33:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2018-10-24 16:33:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 9141. [2018-10-24 16:33:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9141 states. [2018-10-24 16:33:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9141 states to 9141 states and 10091 transitions. [2018-10-24 16:33:24,991 INFO L78 Accepts]: Start accepts. Automaton has 9141 states and 10091 transitions. Word has length 541 [2018-10-24 16:33:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:24,992 INFO L481 AbstractCegarLoop]: Abstraction has 9141 states and 10091 transitions. [2018-10-24 16:33:24,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:33:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9141 states and 10091 transitions. [2018-10-24 16:33:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-10-24 16:33:25,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:25,012 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:25,012 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:25,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:25,013 INFO L82 PathProgramCache]: Analyzing trace with hash -3299966, now seen corresponding path program 1 times [2018-10-24 16:33:25,013 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:25,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:25,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:25,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:25,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-24 16:33:26,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:33:26,007 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:33:26,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:26,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-24 16:33:27,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:33:27,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-24 16:33:27,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:33:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:33:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:33:27,080 INFO L87 Difference]: Start difference. First operand 9141 states and 10091 transitions. Second operand 7 states. [2018-10-24 16:33:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:44,437 INFO L93 Difference]: Finished difference Result 35300 states and 39221 transitions. [2018-10-24 16:33:44,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:33:44,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 579 [2018-10-24 16:33:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:44,479 INFO L225 Difference]: With dead ends: 35300 [2018-10-24 16:33:44,479 INFO L226 Difference]: Without dead ends: 26161 [2018-10-24 16:33:44,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:33:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26161 states. [2018-10-24 16:33:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26161 to 14285. [2018-10-24 16:33:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14285 states. [2018-10-24 16:33:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 15414 transitions. [2018-10-24 16:33:44,810 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 15414 transitions. Word has length 579 [2018-10-24 16:33:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:44,811 INFO L481 AbstractCegarLoop]: Abstraction has 14285 states and 15414 transitions. [2018-10-24 16:33:44,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:33:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 15414 transitions. [2018-10-24 16:33:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2018-10-24 16:33:44,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:44,826 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:44,826 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:44,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:44,827 INFO L82 PathProgramCache]: Analyzing trace with hash 401016699, now seen corresponding path program 1 times [2018-10-24 16:33:44,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:44,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:44,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:44,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:45,484 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 16:33:45,637 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-24 16:33:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-10-24 16:33:45,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:33:45,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:33:45,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:33:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:33:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:33:45,833 INFO L87 Difference]: Start difference. First operand 14285 states and 15414 transitions. Second operand 4 states. [2018-10-24 16:33:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:51,182 INFO L93 Difference]: Finished difference Result 42716 states and 46241 transitions. [2018-10-24 16:33:51,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:33:51,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 600 [2018-10-24 16:33:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:51,226 INFO L225 Difference]: With dead ends: 42716 [2018-10-24 16:33:51,227 INFO L226 Difference]: Without dead ends: 28733 [2018-10-24 16:33:51,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:33:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28733 states. [2018-10-24 16:33:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28733 to 23282. [2018-10-24 16:33:51,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23282 states. [2018-10-24 16:33:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23282 states to 23282 states and 25083 transitions. [2018-10-24 16:33:51,579 INFO L78 Accepts]: Start accepts. Automaton has 23282 states and 25083 transitions. Word has length 600 [2018-10-24 16:33:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:51,581 INFO L481 AbstractCegarLoop]: Abstraction has 23282 states and 25083 transitions. [2018-10-24 16:33:51,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:33:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 23282 states and 25083 transitions. [2018-10-24 16:33:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2018-10-24 16:33:51,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:51,609 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:51,609 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:51,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash -454982086, now seen corresponding path program 1 times [2018-10-24 16:33:51,612 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:51,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:51,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:51,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:51,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:52,559 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:33:52,931 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2018-10-24 16:33:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 98 proven. 485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:33:54,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:33:54,988 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:33:54,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:55,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:55,843 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 21 [2018-10-24 16:33:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 475 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:33:57,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:33:57,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 19 [2018-10-24 16:33:57,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 16:33:57,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 16:33:57,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2018-10-24 16:33:57,588 INFO L87 Difference]: Start difference. First operand 23282 states and 25083 transitions. Second operand 19 states. [2018-10-24 16:34:03,609 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2018-10-24 16:34:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:34:28,514 INFO L93 Difference]: Finished difference Result 81933 states and 88011 transitions. [2018-10-24 16:34:28,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 16:34:28,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 707 [2018-10-24 16:34:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:34:28,581 INFO L225 Difference]: With dead ends: 81933 [2018-10-24 16:34:28,582 INFO L226 Difference]: Without dead ends: 59253 [2018-10-24 16:34:28,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 722 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 16:34:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59253 states. [2018-10-24 16:34:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59253 to 35680. [2018-10-24 16:34:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35680 states. [2018-10-24 16:34:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35680 states to 35680 states and 37896 transitions. [2018-10-24 16:34:29,172 INFO L78 Accepts]: Start accepts. Automaton has 35680 states and 37896 transitions. Word has length 707 [2018-10-24 16:34:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:29,173 INFO L481 AbstractCegarLoop]: Abstraction has 35680 states and 37896 transitions. [2018-10-24 16:34:29,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 16:34:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 35680 states and 37896 transitions. [2018-10-24 16:34:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2018-10-24 16:34:29,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:29,216 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:34:29,216 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:29,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2144904263, now seen corresponding path program 1 times [2018-10-24 16:34:29,217 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:29,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:29,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:29,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:29,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:30,108 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:34:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 132 proven. 814 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 16:34:32,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:34:32,594 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:34:32,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:32,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:34:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-10-24 16:34:33,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:34:33,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2018-10-24 16:34:33,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:34:33,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:34:33,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:34:33,271 INFO L87 Difference]: Start difference. First operand 35680 states and 37896 transitions. Second operand 11 states. [2018-10-24 16:34:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:34:42,405 INFO L93 Difference]: Finished difference Result 71672 states and 76160 transitions. [2018-10-24 16:34:42,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 16:34:42,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 881 [2018-10-24 16:34:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:34:42,443 INFO L225 Difference]: With dead ends: 71672 [2018-10-24 16:34:42,444 INFO L226 Difference]: Without dead ends: 38394 [2018-10-24 16:34:42,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 890 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-10-24 16:34:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38394 states. [2018-10-24 16:34:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38394 to 33252. [2018-10-24 16:34:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33252 states. [2018-10-24 16:34:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33252 states to 33252 states and 34913 transitions. [2018-10-24 16:34:42,862 INFO L78 Accepts]: Start accepts. Automaton has 33252 states and 34913 transitions. Word has length 881 [2018-10-24 16:34:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 33252 states and 34913 transitions. [2018-10-24 16:34:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 16:34:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 33252 states and 34913 transitions. [2018-10-24 16:34:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2018-10-24 16:34:42,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:42,891 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:34:42,891 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:42,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:42,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1691702732, now seen corresponding path program 1 times [2018-10-24 16:34:42,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:42,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:42,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:42,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:42,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 131 proven. 568 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-24 16:34:44,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:34:44,877 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:34:44,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:45,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:34:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 699 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-10-24 16:34:47,392 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:34:47,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 16:34:47,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:34:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:34:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:34:47,394 INFO L87 Difference]: Start difference. First operand 33252 states and 34913 transitions. Second operand 7 states. [2018-10-24 16:34:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:34:55,082 INFO L93 Difference]: Finished difference Result 82929 states and 87321 transitions. [2018-10-24 16:34:55,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:34:55,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 900 [2018-10-24 16:34:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:34:55,124 INFO L225 Difference]: With dead ends: 82929 [2018-10-24 16:34:55,125 INFO L226 Difference]: Without dead ends: 37337 [2018-10-24 16:34:55,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:34:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37337 states. [2018-10-24 16:34:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37337 to 20823. [2018-10-24 16:34:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20823 states. [2018-10-24 16:34:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20823 states to 20823 states and 21643 transitions. [2018-10-24 16:34:55,491 INFO L78 Accepts]: Start accepts. Automaton has 20823 states and 21643 transitions. Word has length 900 [2018-10-24 16:34:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:55,492 INFO L481 AbstractCegarLoop]: Abstraction has 20823 states and 21643 transitions. [2018-10-24 16:34:55,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:34:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 20823 states and 21643 transitions. [2018-10-24 16:34:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 973 [2018-10-24 16:34:55,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:55,510 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:34:55,511 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:55,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash -301869567, now seen corresponding path program 1 times [2018-10-24 16:34:55,511 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:55,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:55,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:55,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:55,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:56,415 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 16:34:56,610 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-24 16:34:56,920 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-24 16:34:57,217 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-10-24 16:34:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 736 proven. 33 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2018-10-24 16:34:59,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:34:59,464 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:34:59,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:59,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:35:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 736 proven. 33 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2018-10-24 16:35:00,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:35:00,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2018-10-24 16:35:00,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 16:35:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 16:35:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-10-24 16:35:00,760 INFO L87 Difference]: Start difference. First operand 20823 states and 21643 transitions. Second operand 16 states. [2018-10-24 16:35:00,898 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2018-10-24 16:35:07,178 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2018-10-24 16:35:10,408 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-10-24 16:35:11,022 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2018-10-24 16:35:11,864 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-10-24 16:35:13,240 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2018-10-24 16:35:14,465 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2018-10-24 16:35:15,323 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2018-10-24 16:35:20,389 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2018-10-24 16:35:22,229 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2018-10-24 16:35:26,087 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2018-10-24 16:35:27,804 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2018-10-24 16:35:29,554 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-24 16:35:30,550 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-24 16:35:32,081 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2018-10-24 16:35:32,797 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2018-10-24 16:35:33,387 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2018-10-24 16:35:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:35,884 INFO L93 Difference]: Finished difference Result 62443 states and 64779 transitions. [2018-10-24 16:35:35,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-24 16:35:35,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 972 [2018-10-24 16:35:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:35,930 INFO L225 Difference]: With dead ends: 62443 [2018-10-24 16:35:35,930 INFO L226 Difference]: Without dead ends: 41912 [2018-10-24 16:35:35,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3896 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1931, Invalid=8169, Unknown=0, NotChecked=0, Total=10100 [2018-10-24 16:35:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41912 states. [2018-10-24 16:35:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41912 to 25941. [2018-10-24 16:35:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25941 states. [2018-10-24 16:35:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25941 states to 25941 states and 26865 transitions. [2018-10-24 16:35:36,313 INFO L78 Accepts]: Start accepts. Automaton has 25941 states and 26865 transitions. Word has length 972 [2018-10-24 16:35:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:36,314 INFO L481 AbstractCegarLoop]: Abstraction has 25941 states and 26865 transitions. [2018-10-24 16:35:36,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 16:35:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 25941 states and 26865 transitions. [2018-10-24 16:35:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2018-10-24 16:35:36,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:36,340 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:35:36,340 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:36,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1261034056, now seen corresponding path program 1 times [2018-10-24 16:35:36,341 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:36,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:36,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:36,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:36,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 1340 proven. 0 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2018-10-24 16:35:37,807 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:37,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:35:37,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:35:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:35:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:35:37,809 INFO L87 Difference]: Start difference. First operand 25941 states and 26865 transitions. Second operand 3 states. [2018-10-24 16:35:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:42,563 INFO L93 Difference]: Finished difference Result 53077 states and 54977 transitions. [2018-10-24 16:35:42,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:35:42,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1076 [2018-10-24 16:35:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:42,585 INFO L225 Difference]: With dead ends: 53077 [2018-10-24 16:35:42,585 INFO L226 Difference]: Without dead ends: 21092 [2018-10-24 16:35:42,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:35:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21092 states. [2018-10-24 16:35:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21092 to 18391. [2018-10-24 16:35:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18391 states. [2018-10-24 16:35:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18391 states to 18391 states and 18868 transitions. [2018-10-24 16:35:42,840 INFO L78 Accepts]: Start accepts. Automaton has 18391 states and 18868 transitions. Word has length 1076 [2018-10-24 16:35:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:42,841 INFO L481 AbstractCegarLoop]: Abstraction has 18391 states and 18868 transitions. [2018-10-24 16:35:42,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:35:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 18391 states and 18868 transitions. [2018-10-24 16:35:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2018-10-24 16:35:42,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:42,863 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:35:42,863 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:42,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:42,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1592615012, now seen corresponding path program 1 times [2018-10-24 16:35:42,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:42,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:42,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:42,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:42,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 1132 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2018-10-24 16:35:44,109 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:44,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:35:44,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:35:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:35:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:35:44,111 INFO L87 Difference]: Start difference. First operand 18391 states and 18868 transitions. Second operand 3 states. [2018-10-24 16:35:46,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:46,039 INFO L93 Difference]: Finished difference Result 29531 states and 30273 transitions. [2018-10-24 16:35:46,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:35:46,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1094 [2018-10-24 16:35:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:46,051 INFO L225 Difference]: With dead ends: 29531 [2018-10-24 16:35:46,051 INFO L226 Difference]: Without dead ends: 13242 [2018-10-24 16:35:46,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:35:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13242 states. [2018-10-24 16:35:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13242 to 12642. [2018-10-24 16:35:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12642 states. [2018-10-24 16:35:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12642 states to 12642 states and 12860 transitions. [2018-10-24 16:35:46,222 INFO L78 Accepts]: Start accepts. Automaton has 12642 states and 12860 transitions. Word has length 1094 [2018-10-24 16:35:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:46,222 INFO L481 AbstractCegarLoop]: Abstraction has 12642 states and 12860 transitions. [2018-10-24 16:35:46,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:35:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 12642 states and 12860 transitions. [2018-10-24 16:35:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2018-10-24 16:35:46,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:46,238 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:35:46,239 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:46,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:46,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1640094595, now seen corresponding path program 1 times [2018-10-24 16:35:46,239 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:46,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:46,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:46,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:46,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1798 backedges. 1277 proven. 0 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-10-24 16:35:48,053 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:48,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:35:48,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:35:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:35:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:35:48,055 INFO L87 Difference]: Start difference. First operand 12642 states and 12860 transitions. Second operand 3 states. [2018-10-24 16:35:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:49,513 INFO L93 Difference]: Finished difference Result 25588 states and 26034 transitions. [2018-10-24 16:35:49,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:35:49,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1104 [2018-10-24 16:35:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:49,525 INFO L225 Difference]: With dead ends: 25588 [2018-10-24 16:35:49,525 INFO L226 Difference]: Without dead ends: 15048 [2018-10-24 16:35:49,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:35:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15048 states. [2018-10-24 16:35:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15048 to 13842. [2018-10-24 16:35:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13842 states. [2018-10-24 16:35:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13842 states to 13842 states and 14076 transitions. [2018-10-24 16:35:49,709 INFO L78 Accepts]: Start accepts. Automaton has 13842 states and 14076 transitions. Word has length 1104 [2018-10-24 16:35:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:49,710 INFO L481 AbstractCegarLoop]: Abstraction has 13842 states and 14076 transitions. [2018-10-24 16:35:49,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:35:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 13842 states and 14076 transitions. [2018-10-24 16:35:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1143 [2018-10-24 16:35:49,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:49,724 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:35:49,724 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:49,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1774140287, now seen corresponding path program 1 times [2018-10-24 16:35:49,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:49,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:49,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:49,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:49,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:50,727 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:35:50,925 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-24 16:35:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2131 backedges. 1626 proven. 213 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-10-24 16:35:52,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:35:52,634 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:35:52,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:52,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:35:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2131 backedges. 1766 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-10-24 16:35:54,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:35:54,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 14 [2018-10-24 16:35:54,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 16:35:54,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 16:35:54,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2018-10-24 16:35:54,179 INFO L87 Difference]: Start difference. First operand 13842 states and 14076 transitions. Second operand 14 states. [2018-10-24 16:35:58,191 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2018-10-24 16:36:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:36:00,873 INFO L93 Difference]: Finished difference Result 26130 states and 26571 transitions. [2018-10-24 16:36:00,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 16:36:00,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1142 [2018-10-24 16:36:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:36:00,886 INFO L225 Difference]: With dead ends: 26130 [2018-10-24 16:36:00,886 INFO L226 Difference]: Without dead ends: 13462 [2018-10-24 16:36:00,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1178 GetRequests, 1150 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2018-10-24 16:36:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13462 states. [2018-10-24 16:36:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13462 to 13236. [2018-10-24 16:36:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13236 states. [2018-10-24 16:36:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13236 states to 13236 states and 13447 transitions. [2018-10-24 16:36:01,067 INFO L78 Accepts]: Start accepts. Automaton has 13236 states and 13447 transitions. Word has length 1142 [2018-10-24 16:36:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:36:01,067 INFO L481 AbstractCegarLoop]: Abstraction has 13236 states and 13447 transitions. [2018-10-24 16:36:01,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 16:36:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 13236 states and 13447 transitions. [2018-10-24 16:36:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2018-10-24 16:36:01,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:36:01,082 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:36:01,082 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:36:01,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:36:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1425205259, now seen corresponding path program 1 times [2018-10-24 16:36:01,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:36:01,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:36:01,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:36:01,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:36:01,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:36:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-24 16:36:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 978 proven. 33 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2018-10-24 16:36:04,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:36:04,647 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:36:04,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:36:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:36:04,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:36:04,967 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 16:36:05,168 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:36:05,168 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:36:05,175 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:36:05,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:36:05 BoogieIcfgContainer [2018-10-24 16:36:05,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:36:05,177 INFO L168 Benchmark]: Toolchain (without parser) took 236093.45 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -768.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-24 16:36:05,178 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:36:05,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1218.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:36:05,181 INFO L168 Benchmark]: Boogie Procedure Inliner took 425.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 772.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -890.9 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:36:05,181 INFO L168 Benchmark]: Boogie Preprocessor took 248.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:36:05,186 INFO L168 Benchmark]: RCFGBuilder took 8866.76 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 312.5 MB). Peak memory consumption was 312.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:36:05,187 INFO L168 Benchmark]: TraceAbstraction took 225328.62 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -322.9 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-10-24 16:36:05,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1218.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 425.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 772.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -890.9 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 248.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8866.76 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 312.5 MB). Peak memory consumption was 312.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 225328.62 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -322.9 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 109). Cancelled while BasicCegarLoop was analyzing trace of length 1149 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 225.2s OverallTime, 18 OverallIterations, 7 TraceHistogramMax, 177.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4102 SDtfs, 41775 SDslu, 4671 SDs, 0 SdLazy, 79535 SolverSat, 11766 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 145.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6777 GetRequests, 6520 SyntacticMatches, 33 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4416 ImplicationChecksByTransitivity, 18.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35680occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.8s AutomataMinimizationTime, 17 MinimizatonAttempts, 87662 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 23.0s InterpolantComputationTime, 17582 NumberOfCodeBlocks, 17582 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 17556 ConstructedInterpolants, 560 QuantifiedInterpolants, 79337506 SizeOfPredicates, 14 NumberOfNonLiveVariables, 7508 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 26 InterpolantComputations, 13 PerfectInterpolantSequences, 18837/21433 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown