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/loop-acceleration/array_false-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:40:29,141 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:40:29,147 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:40:29,163 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:40:29,163 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:40:29,165 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:40:29,167 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:40:29,169 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:40:29,171 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:40:29,172 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:40:29,173 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:40:29,175 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:40:29,176 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:40:29,177 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:40:29,178 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:40:29,182 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:40:29,183 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:40:29,186 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:40:29,195 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:40:29,200 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:40:29,201 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:40:29,204 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:40:29,209 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:40:29,227 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 [2018-10-22 15:40:29,247 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:40:29,248 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:40:29,249 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:40:29,249 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:40:29,249 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:40:29,250 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:40:29,250 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:40:29,250 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:40:29,250 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:40:29,250 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:40:29,251 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:40:29,251 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:40:29,251 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:40:29,251 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:40:29,251 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:40:29,252 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:40:29,252 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:40:29,252 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:40:29,252 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:40:29,252 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:29,253 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:40:29,253 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:40:29,253 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:40:29,253 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:40:29,253 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:40:29,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:40:29,254 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:40:29,254 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:40:29,317 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:40:29,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:40:29,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:40:29,338 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:40:29,338 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:40:29,339 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-10-22 15:40:29,404 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/35fde57b7/cddc55f1017f43538608ecde599e41f0/FLAG4363659a4 [2018-10-22 15:40:29,916 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:40:29,917 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-10-22 15:40:29,924 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/35fde57b7/cddc55f1017f43538608ecde599e41f0/FLAG4363659a4 [2018-10-22 15:40:29,940 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/35fde57b7/cddc55f1017f43538608ecde599e41f0 [2018-10-22 15:40:29,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:40:29,950 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:40:29,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:29,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:40:29,955 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:40:29,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1986f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29, skipping insertion in model container [2018-10-22 15:40:29,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:40:29,988 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:40:30,155 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:30,159 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:40:30,179 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:30,200 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:40:30,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30 WrapperNode [2018-10-22 15:40:30,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:30,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:30,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:40:30,202 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:40:30,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:30,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:40:30,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:40:30,245 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:40:30,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (1/1) ... [2018-10-22 15:40:30,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:40:30,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:40:30,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:40:30,270 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:40:30,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (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 [2018-10-22 15:40:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-22 15:40:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:40:30,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:40:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-22 15:40:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-22 15:40:30,785 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:40:30,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:30 BoogieIcfgContainer [2018-10-22 15:40:30,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:40:30,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:40:30,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:40:30,791 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:40:30,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:40:29" (1/3) ... [2018-10-22 15:40:30,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379ef060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:30, skipping insertion in model container [2018-10-22 15:40:30,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:30" (2/3) ... [2018-10-22 15:40:30,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379ef060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:30, skipping insertion in model container [2018-10-22 15:40:30,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:30" (3/3) ... [2018-10-22 15:40:30,795 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call2_true-termination.i [2018-10-22 15:40:30,806 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:40:30,816 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:40:30,834 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:40:30,867 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:40:30,868 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:40:30,868 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:40:30,868 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:40:30,868 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:40:30,868 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:40:30,868 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:40:30,868 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:40:30,869 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:40:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-22 15:40:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:40:30,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:30,891 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:30,893 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:30,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2021094374, now seen corresponding path program 1 times [2018-10-22 15:40:30,906 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:30,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:30,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:30,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,034 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:31,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:40:31,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:40:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:40:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:31,054 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-22 15:40:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:31,070 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-22 15:40:31,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:40:31,072 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 15:40:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:31,083 INFO L225 Difference]: With dead ends: 38 [2018-10-22 15:40:31,084 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:40:31,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:40:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:40:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:40:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 15:40:31,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2018-10-22 15:40:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:31,127 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 15:40:31,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:40:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 15:40:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:40:31,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:31,128 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:31,129 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:31,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1064529813, now seen corresponding path program 1 times [2018-10-22 15:40:31,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:31,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:31,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:31,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,233 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:31,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:31,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:31,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:31,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:31,236 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-10-22 15:40:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:31,310 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-22 15:40:31,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:31,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-22 15:40:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:31,312 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:40:31,312 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:40:31,313 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 [2018-10-22 15:40:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:40:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-22 15:40:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:40:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 15:40:31,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2018-10-22 15:40:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:31,319 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 15:40:31,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 15:40:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:40:31,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:31,321 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:31,322 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:31,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:31,322 INFO L82 PathProgramCache]: Analyzing trace with hash 55281387, now seen corresponding path program 1 times [2018-10-22 15:40:31,322 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:31,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:31,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:31,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:31,425 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 [2018-10-22 15:40:31,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:31,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:31,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-22 15:40:31,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:40:31,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:40:31,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:31,564 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-22 15:40:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:31,713 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-22 15:40:31,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:40:31,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-22 15:40:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:31,715 INFO L225 Difference]: With dead ends: 32 [2018-10-22 15:40:31,716 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:40:31,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:40:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-10-22 15:40:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:40:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-22 15:40:31,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2018-10-22 15:40:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:31,725 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-22 15:40:31,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:40:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-22 15:40:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:40:31,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:31,727 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:31,727 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:31,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1196780203, now seen corresponding path program 2 times [2018-10-22 15:40:31,728 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:31,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:31,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:31,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:31,821 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 [2018-10-22 15:40:31,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:31,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:31,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:31,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:32,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-22 15:40:32,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:40:32,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:40:32,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:32,069 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2018-10-22 15:40:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:32,198 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-22 15:40:32,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:40:32,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-10-22 15:40:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:32,200 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:40:32,200 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:40:32,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:40:32,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-22 15:40:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:40:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-22 15:40:32,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2018-10-22 15:40:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:32,207 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-22 15:40:32,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:40:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-22 15:40:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:40:32,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:32,208 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:32,208 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:32,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash 526776619, now seen corresponding path program 3 times [2018-10-22 15:40:32,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:32,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:32,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:32,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:32,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:32,338 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 [2018-10-22 15:40:32,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:32,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:40:32,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:32,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:32,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-22 15:40:32,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:40:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:40:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:32,537 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 7 states. [2018-10-22 15:40:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:32,623 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-22 15:40:32,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:40:32,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-10-22 15:40:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:32,626 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:40:32,627 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:40:32,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:40:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-10-22 15:40:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:40:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-22 15:40:32,632 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2018-10-22 15:40:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:32,633 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-22 15:40:32,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:40:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-22 15:40:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:40:32,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:32,634 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:32,635 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:32,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 310217493, now seen corresponding path program 4 times [2018-10-22 15:40:32,635 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:32,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:32,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:32,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:32,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:32,761 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 [2018-10-22 15:40:32,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:32,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:32,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:32,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:32,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-22 15:40:32,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:40:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:40:32,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:32,873 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2018-10-22 15:40:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:33,076 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-22 15:40:33,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:40:33,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-10-22 15:40:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:33,078 INFO L225 Difference]: With dead ends: 47 [2018-10-22 15:40:33,078 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:40:33,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:40:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-10-22 15:40:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:40:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-22 15:40:33,084 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-10-22 15:40:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:33,085 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-22 15:40:33,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:40:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-22 15:40:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:40:33,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:33,086 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:33,087 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:33,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:33,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1942395755, now seen corresponding path program 5 times [2018-10-22 15:40:33,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:33,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:33,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:33,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:33,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:33,521 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 [2018-10-22 15:40:33,538 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:33,589 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:40:33,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:33,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:33,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:33,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-22 15:40:33,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:40:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:40:33,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:33,645 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 9 states. [2018-10-22 15:40:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:33,744 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 15:40:33,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:40:33,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-22 15:40:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:33,746 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:40:33,747 INFO L226 Difference]: Without dead ends: 46 [2018-10-22 15:40:33,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-22 15:40:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-10-22 15:40:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 15:40:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-22 15:40:33,753 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2018-10-22 15:40:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:33,753 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-22 15:40:33,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:40:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-22 15:40:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:40:33,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:33,755 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:33,755 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:33,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1483231445, now seen corresponding path program 6 times [2018-10-22 15:40:33,756 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:33,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:33,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:33,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:33,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:33,971 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 [2018-10-22 15:40:33,980 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:34,048 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:40:34,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:34,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:34,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-22 15:40:34,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:40:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:40:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:34,110 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 10 states. [2018-10-22 15:40:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:34,223 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-22 15:40:34,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:40:34,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-10-22 15:40:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:34,224 INFO L225 Difference]: With dead ends: 57 [2018-10-22 15:40:34,225 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:40:34,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:40:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-10-22 15:40:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 15:40:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-22 15:40:34,230 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2018-10-22 15:40:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:34,231 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-22 15:40:34,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:40:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-22 15:40:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:40:34,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:34,233 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:34,233 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:34,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1032753749, now seen corresponding path program 7 times [2018-10-22 15:40:34,234 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:34,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:34,415 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 [2018-10-22 15:40:34,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:34,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:34,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-22 15:40:34,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:40:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:40:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:34,627 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 11 states. [2018-10-22 15:40:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:34,970 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-22 15:40:34,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:40:34,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-10-22 15:40:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:34,977 INFO L225 Difference]: With dead ends: 62 [2018-10-22 15:40:34,977 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:40:34,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:40:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-10-22 15:40:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:40:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-22 15:40:34,986 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2018-10-22 15:40:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:34,986 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-22 15:40:34,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:40:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-22 15:40:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:40:34,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:34,995 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:34,995 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:34,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1793517205, now seen corresponding path program 8 times [2018-10-22 15:40:34,996 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:34,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:34,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:34,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:35,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:35,318 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 [2018-10-22 15:40:35,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:35,379 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:35,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:35,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:35,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:35,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-22 15:40:35,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:40:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:40:35,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:35,442 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 12 states. [2018-10-22 15:40:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:35,792 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 15:40:35,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:40:35,793 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-22 15:40:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:35,795 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:40:35,795 INFO L226 Difference]: Without dead ends: 61 [2018-10-22 15:40:35,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-22 15:40:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2018-10-22 15:40:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-22 15:40:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-22 15:40:35,801 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2018-10-22 15:40:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:35,801 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-22 15:40:35,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:40:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-22 15:40:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-22 15:40:35,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:35,803 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:35,803 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:35,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash 409628651, now seen corresponding path program 9 times [2018-10-22 15:40:35,804 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:35,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:35,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:35,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:36,157 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 [2018-10-22 15:40:36,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:36,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:40:36,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:36,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:36,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-22 15:40:36,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:40:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:40:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:36,323 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 13 states. [2018-10-22 15:40:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:36,447 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-22 15:40:36,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:40:36,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-10-22 15:40:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:36,449 INFO L225 Difference]: With dead ends: 72 [2018-10-22 15:40:36,449 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:40:36,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:40:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-10-22 15:40:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-22 15:40:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-22 15:40:36,456 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2018-10-22 15:40:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:36,457 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-22 15:40:36,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:40:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-22 15:40:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:40:36,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,458 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,459 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1082831787, now seen corresponding path program 10 times [2018-10-22 15:40:36,459 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:36,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:36,795 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 [2018-10-22 15:40:36,808 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:36,877 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:36,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:36,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:36,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-22 15:40:36,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:40:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:40:36,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:40:36,948 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 14 states. [2018-10-22 15:40:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:37,107 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-22 15:40:37,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:40:37,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2018-10-22 15:40:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:37,109 INFO L225 Difference]: With dead ends: 77 [2018-10-22 15:40:37,109 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:40:37,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:40:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:40:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2018-10-22 15:40:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:40:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-22 15:40:37,116 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2018-10-22 15:40:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:37,117 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-22 15:40:37,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:40:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-22 15:40:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:40:37,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:37,118 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:37,119 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:37,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:37,119 INFO L82 PathProgramCache]: Analyzing trace with hash 230007339, now seen corresponding path program 11 times [2018-10-22 15:40:37,119 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:37,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:37,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:37,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:37,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:37,369 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:37,380 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:37,467 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:40:37,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:37,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:37,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:37,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-22 15:40:37,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:40:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:40:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:40:37,526 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 15 states. [2018-10-22 15:40:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:37,659 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-22 15:40:37,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:40:37,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2018-10-22 15:40:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:37,660 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:40:37,660 INFO L226 Difference]: Without dead ends: 76 [2018-10-22 15:40:37,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:40:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-22 15:40:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-10-22 15:40:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-22 15:40:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-22 15:40:37,667 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2018-10-22 15:40:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:37,667 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-22 15:40:37,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:40:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-22 15:40:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-22 15:40:37,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:37,669 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:37,670 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:37,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash 546275861, now seen corresponding path program 12 times [2018-10-22 15:40:37,670 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:37,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:37,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:37,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:38,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:38,106 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:38,118 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:38,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:40:38,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:38,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:38,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:38,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-22 15:40:38,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:40:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:40:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:40:38,397 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 16 states. [2018-10-22 15:40:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:38,584 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-22 15:40:38,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:40:38,584 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2018-10-22 15:40:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:38,585 INFO L225 Difference]: With dead ends: 87 [2018-10-22 15:40:38,586 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:40:38,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:40:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:40:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-10-22 15:40:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-22 15:40:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-22 15:40:38,595 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2018-10-22 15:40:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:38,596 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-22 15:40:38,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:40:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-22 15:40:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-22 15:40:38,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:38,598 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:38,598 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:38,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash 89588843, now seen corresponding path program 13 times [2018-10-22 15:40:38,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:38,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:38,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:38,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:38,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:38,894 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:38,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:38,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:39,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:39,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-22 15:40:39,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:40:39,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:40:39,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:40:39,010 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 17 states. [2018-10-22 15:40:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:39,445 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-22 15:40:39,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:40:39,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2018-10-22 15:40:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:39,448 INFO L225 Difference]: With dead ends: 92 [2018-10-22 15:40:39,449 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 15:40:39,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:40:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 15:40:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-22 15:40:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:40:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-22 15:40:39,454 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2018-10-22 15:40:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:39,454 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-22 15:40:39,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:40:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-22 15:40:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:40:39,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:39,456 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:39,456 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:39,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1840351189, now seen corresponding path program 14 times [2018-10-22 15:40:39,456 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:39,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:39,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:39,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:39,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:39,752 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:39,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:39,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:39,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:39,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:39,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:39,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-22 15:40:39,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:40:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:40:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:40:39,863 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 18 states. [2018-10-22 15:40:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:39,988 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-22 15:40:39,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:40:39,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-10-22 15:40:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:39,990 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:40:39,990 INFO L226 Difference]: Without dead ends: 91 [2018-10-22 15:40:39,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:40:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-22 15:40:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-10-22 15:40:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-22 15:40:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-22 15:40:39,997 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2018-10-22 15:40:39,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:39,998 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-22 15:40:39,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:40:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-22 15:40:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-22 15:40:39,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:39,999 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:40,000 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:40,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:40,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1834129067, now seen corresponding path program 15 times [2018-10-22 15:40:40,000 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:40,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:40,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:40,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:41,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:41,211 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:41,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:41,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:40:41,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:41,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:41,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:41,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-22 15:40:41,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:40:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:40:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:40:41,560 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 19 states. [2018-10-22 15:40:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:41,823 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-22 15:40:41,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:40:41,823 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-10-22 15:40:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:41,825 INFO L225 Difference]: With dead ends: 102 [2018-10-22 15:40:41,825 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:40:41,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:40:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:40:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-10-22 15:40:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-22 15:40:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-22 15:40:41,831 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2018-10-22 15:40:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:41,832 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-22 15:40:41,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:40:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-22 15:40:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 15:40:41,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:41,834 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:41,834 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:41,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1532452245, now seen corresponding path program 16 times [2018-10-22 15:40:41,835 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:41,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:41,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:41,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:42,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:42,138 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:42,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:42,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:42,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:42,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:42,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:42,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-22 15:40:42,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:40:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:40:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:40:42,280 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 20 states. [2018-10-22 15:40:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:42,429 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-22 15:40:42,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:40:42,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2018-10-22 15:40:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:42,431 INFO L225 Difference]: With dead ends: 107 [2018-10-22 15:40:42,431 INFO L226 Difference]: Without dead ends: 101 [2018-10-22 15:40:42,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:40:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-22 15:40:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2018-10-22 15:40:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:40:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-22 15:40:42,435 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2018-10-22 15:40:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:42,436 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-22 15:40:42,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:40:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-22 15:40:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-22 15:40:42,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:42,437 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:42,437 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:42,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:42,438 INFO L82 PathProgramCache]: Analyzing trace with hash -22259477, now seen corresponding path program 17 times [2018-10-22 15:40:42,438 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:42,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:42,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:42,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:42,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:42,695 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:42,710 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:42,886 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:40:42,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:42,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:42,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:42,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-22 15:40:42,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:40:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:40:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:40:42,939 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 21 states. [2018-10-22 15:40:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:43,150 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-22 15:40:43,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:40:43,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2018-10-22 15:40:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:43,151 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:40:43,152 INFO L226 Difference]: Without dead ends: 106 [2018-10-22 15:40:43,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:40:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-22 15:40:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2018-10-22 15:40:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-22 15:40:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-22 15:40:43,156 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2018-10-22 15:40:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:43,156 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-22 15:40:43,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:40:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-22 15:40:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-22 15:40:43,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:43,157 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:43,158 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:43,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash 855442261, now seen corresponding path program 18 times [2018-10-22 15:40:43,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:43,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:43,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:43,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:43,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:43,504 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:43,512 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:44,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:40:44,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:44,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:44,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:44,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-22 15:40:44,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:40:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:40:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:44,185 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 22 states. [2018-10-22 15:40:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:44,488 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-22 15:40:44,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:40:44,488 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2018-10-22 15:40:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:44,490 INFO L225 Difference]: With dead ends: 117 [2018-10-22 15:40:44,490 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:40:44,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:40:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2018-10-22 15:40:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-22 15:40:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-22 15:40:44,494 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2018-10-22 15:40:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:44,495 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-22 15:40:44,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:40:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-22 15:40:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-22 15:40:44,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:44,496 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:44,496 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:44,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash -43496661, now seen corresponding path program 19 times [2018-10-22 15:40:44,496 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:44,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:44,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:44,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:44,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:44,981 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:44,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:45,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:45,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:45,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-22 15:40:45,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:40:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:40:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:40:45,126 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 23 states. [2018-10-22 15:40:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:45,274 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-22 15:40:45,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:40:45,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-22 15:40:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:45,277 INFO L225 Difference]: With dead ends: 122 [2018-10-22 15:40:45,277 INFO L226 Difference]: Without dead ends: 116 [2018-10-22 15:40:45,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:40:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-22 15:40:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2018-10-22 15:40:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:40:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-22 15:40:45,282 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2018-10-22 15:40:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:45,282 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-22 15:40:45,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:40:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-22 15:40:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:40:45,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:45,284 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:45,284 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:45,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1826719467, now seen corresponding path program 20 times [2018-10-22 15:40:45,285 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:45,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:45,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:45,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:45,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:45,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:45,829 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:45,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:45,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:45,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:45,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:45,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:45,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-22 15:40:46,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:40:46,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:40:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:40:46,000 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 24 states. [2018-10-22 15:40:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:46,218 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-22 15:40:46,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:40:46,221 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2018-10-22 15:40:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:46,223 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:40:46,223 INFO L226 Difference]: Without dead ends: 121 [2018-10-22 15:40:46,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:40:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-22 15:40:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2018-10-22 15:40:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:40:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-22 15:40:46,227 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2018-10-22 15:40:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:46,227 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-22 15:40:46,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:40:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-22 15:40:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:40:46,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:46,228 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:46,228 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:46,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2022337899, now seen corresponding path program 21 times [2018-10-22 15:40:46,229 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:46,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:46,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:46,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:47,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:47,234 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:47,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:49,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:40:49,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:49,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:49,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:49,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-22 15:40:49,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:40:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:40:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:40:49,408 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 25 states. [2018-10-22 15:40:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:49,597 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-22 15:40:49,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:40:49,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2018-10-22 15:40:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:49,599 INFO L225 Difference]: With dead ends: 132 [2018-10-22 15:40:49,599 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:40:49,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:40:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:40:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2018-10-22 15:40:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-22 15:40:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-22 15:40:49,603 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2018-10-22 15:40:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:49,604 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-22 15:40:49,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:40:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-22 15:40:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-22 15:40:49,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:49,605 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:49,605 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:49,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash 792182485, now seen corresponding path program 22 times [2018-10-22 15:40:49,605 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:49,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:49,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:49,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:49,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:50,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:50,371 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:50,380 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:50,479 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:50,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:50,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:50,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:50,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-22 15:40:50,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:40:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:40:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:40:50,534 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 26 states. [2018-10-22 15:40:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:50,723 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-22 15:40:50,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:40:50,723 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 122 [2018-10-22 15:40:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:50,724 INFO L225 Difference]: With dead ends: 137 [2018-10-22 15:40:50,725 INFO L226 Difference]: Without dead ends: 131 [2018-10-22 15:40:50,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:40:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-22 15:40:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2018-10-22 15:40:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:40:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-22 15:40:50,729 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2018-10-22 15:40:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:50,729 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-22 15:40:50,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:40:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-22 15:40:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:40:50,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:50,730 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:50,730 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:50,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:50,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1978220629, now seen corresponding path program 23 times [2018-10-22 15:40:50,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:50,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:50,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:50,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:51,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:51,115 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:51,123 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:51,501 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:40:51,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:51,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:51,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:51,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-22 15:40:51,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:40:51,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:40:51,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:40:51,575 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 27 states. [2018-10-22 15:40:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:51,760 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-22 15:40:51,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:40:51,761 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 127 [2018-10-22 15:40:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:51,762 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:40:51,762 INFO L226 Difference]: Without dead ends: 136 [2018-10-22 15:40:51,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:40:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-22 15:40:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2018-10-22 15:40:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-22 15:40:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-22 15:40:51,767 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2018-10-22 15:40:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:51,768 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-22 15:40:51,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:40:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-22 15:40:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-22 15:40:51,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:51,769 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:51,769 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:51,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:51,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1882925931, now seen corresponding path program 24 times [2018-10-22 15:40:51,769 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:51,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:51,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:51,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:51,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:52,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:52,571 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:52,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:57,080 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-22 15:40:57,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:57,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:57,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:57,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-22 15:40:57,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:40:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:40:57,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:40:57,158 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 28 states. [2018-10-22 15:40:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:57,480 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-22 15:40:57,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:40:57,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 132 [2018-10-22 15:40:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:57,482 INFO L225 Difference]: With dead ends: 147 [2018-10-22 15:40:57,482 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:40:57,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:40:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:40:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2018-10-22 15:40:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-22 15:40:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-22 15:40:57,486 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2018-10-22 15:40:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:57,486 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-22 15:40:57,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:40:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-22 15:40:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-22 15:40:57,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:57,488 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:57,488 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:57,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1760476693, now seen corresponding path program 25 times [2018-10-22 15:40:57,488 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:57,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:57,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:57,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:57,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:59,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:59,520 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:59,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:59,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:59,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:59,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-22 15:40:59,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:40:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:40:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:40:59,673 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 29 states. [2018-10-22 15:40:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:59,868 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-10-22 15:40:59,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:40:59,872 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2018-10-22 15:40:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:59,873 INFO L225 Difference]: With dead ends: 152 [2018-10-22 15:40:59,873 INFO L226 Difference]: Without dead ends: 146 [2018-10-22 15:40:59,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:40:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-22 15:40:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2018-10-22 15:40:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 15:40:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-22 15:40:59,877 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2018-10-22 15:40:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:59,877 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-22 15:40:59,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:40:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-22 15:40:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 15:40:59,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:59,878 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:59,879 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:59,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash -767444395, now seen corresponding path program 26 times [2018-10-22 15:40:59,879 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:59,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:59,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:59,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:59,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:01,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:01,124 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:01,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:01,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:01,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:01,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:01,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:01,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-22 15:41:01,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:41:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:41:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:41:01,328 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 30 states. [2018-10-22 15:41:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:01,783 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-22 15:41:01,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:41:01,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2018-10-22 15:41:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:01,786 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:41:01,786 INFO L226 Difference]: Without dead ends: 151 [2018-10-22 15:41:01,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:41:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-22 15:41:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2018-10-22 15:41:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-22 15:41:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-22 15:41:01,791 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2018-10-22 15:41:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:01,791 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-22 15:41:01,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:41:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-22 15:41:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-22 15:41:01,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:01,792 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:01,792 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:01,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:01,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1887570901, now seen corresponding path program 27 times [2018-10-22 15:41:01,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:01,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:01,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:01,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:01,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:02,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:02,790 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:02,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:10,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:41:10,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:10,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:10,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:10,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-22 15:41:10,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:41:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:41:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:41:10,366 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 31 states. [2018-10-22 15:41:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:10,542 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-22 15:41:10,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:41:10,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2018-10-22 15:41:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:10,544 INFO L225 Difference]: With dead ends: 162 [2018-10-22 15:41:10,545 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:41:10,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:41:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:41:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-10-22 15:41:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-22 15:41:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-22 15:41:10,550 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2018-10-22 15:41:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:10,550 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-22 15:41:10,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:41:10,550 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-22 15:41:10,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-22 15:41:10,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:10,551 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:10,551 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:10,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1764388885, now seen corresponding path program 28 times [2018-10-22 15:41:10,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:10,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:10,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:10,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:10,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:11,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:11,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:11,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:11,789 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:11,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:11,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:11,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:11,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-22 15:41:11,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:41:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:41:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:41:11,855 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 32 states. [2018-10-22 15:41:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:12,048 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-22 15:41:12,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:41:12,048 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 152 [2018-10-22 15:41:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:12,050 INFO L225 Difference]: With dead ends: 167 [2018-10-22 15:41:12,050 INFO L226 Difference]: Without dead ends: 161 [2018-10-22 15:41:12,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:41:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-22 15:41:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-10-22 15:41:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:41:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-22 15:41:12,055 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2018-10-22 15:41:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:12,055 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-22 15:41:12,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:41:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-22 15:41:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:41:12,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:12,056 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:12,056 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:12,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:12,057 INFO L82 PathProgramCache]: Analyzing trace with hash 778098283, now seen corresponding path program 29 times [2018-10-22 15:41:12,057 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:12,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:12,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:12,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:12,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:12,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:12,645 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:12,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:16,629 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-22 15:41:16,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:16,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:16,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:16,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-22 15:41:16,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:41:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:41:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:41:16,807 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 33 states. [2018-10-22 15:41:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:17,752 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-22 15:41:17,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:41:17,752 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2018-10-22 15:41:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:17,754 INFO L225 Difference]: With dead ends: 172 [2018-10-22 15:41:17,754 INFO L226 Difference]: Without dead ends: 166 [2018-10-22 15:41:17,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:41:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-22 15:41:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2018-10-22 15:41:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-22 15:41:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-22 15:41:17,759 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2018-10-22 15:41:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:17,759 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-22 15:41:17,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:41:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-22 15:41:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-22 15:41:17,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:17,760 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:17,760 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:17,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash -604310059, now seen corresponding path program 30 times [2018-10-22 15:41:17,761 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:17,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:17,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:17,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:17,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:18,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:18,363 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:18,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:46,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-22 15:41:46,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:46,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:46,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:46,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-22 15:41:46,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:41:46,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:41:46,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:46,825 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 34 states. [2018-10-22 15:41:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:47,135 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-22 15:41:47,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:41:47,136 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2018-10-22 15:41:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:47,137 INFO L225 Difference]: With dead ends: 177 [2018-10-22 15:41:47,137 INFO L226 Difference]: Without dead ends: 171 [2018-10-22 15:41:47,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-22 15:41:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2018-10-22 15:41:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-22 15:41:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-10-22 15:41:47,143 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2018-10-22 15:41:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:47,144 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-10-22 15:41:47,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:41:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-10-22 15:41:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-22 15:41:47,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:47,145 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:47,145 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:47,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:47,146 INFO L82 PathProgramCache]: Analyzing trace with hash 968747179, now seen corresponding path program 31 times [2018-10-22 15:41:47,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:47,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:47,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:47,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:47,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:48,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:48,157 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:48,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:48,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:48,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:48,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-22 15:41:48,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:41:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:41:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:41:48,342 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 35 states. [2018-10-22 15:41:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:49,321 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-22 15:41:49,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:41:49,321 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2018-10-22 15:41:49,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:49,322 INFO L225 Difference]: With dead ends: 182 [2018-10-22 15:41:49,323 INFO L226 Difference]: Without dead ends: 176 [2018-10-22 15:41:49,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:41:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-22 15:41:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2018-10-22 15:41:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-22 15:41:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-22 15:41:49,328 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2018-10-22 15:41:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:49,328 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-22 15:41:49,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:41:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-22 15:41:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-22 15:41:49,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:49,330 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:49,330 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:49,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:49,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2026943595, now seen corresponding path program 32 times [2018-10-22 15:41:49,330 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:49,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:49,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:49,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:49,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:50,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:50,154 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:50,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:50,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:50,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:50,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:50,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:50,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-22 15:41:50,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:41:50,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:41:50,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:41:50,366 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 36 states. [2018-10-22 15:41:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:50,605 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-22 15:41:50,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:41:50,606 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 172 [2018-10-22 15:41:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:50,608 INFO L225 Difference]: With dead ends: 187 [2018-10-22 15:41:50,608 INFO L226 Difference]: Without dead ends: 181 [2018-10-22 15:41:50,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:41:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-22 15:41:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2018-10-22 15:41:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-22 15:41:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-22 15:41:50,613 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2018-10-22 15:41:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:50,613 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-22 15:41:50,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:41:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-22 15:41:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-22 15:41:50,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:50,615 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:50,615 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:50,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:50,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1030149397, now seen corresponding path program 33 times [2018-10-22 15:41:50,616 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:50,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:50,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:50,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:50,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:51,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:51,509 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:51,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:42:00,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-22 15:42:00,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:00,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:00,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:00,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-22 15:42:00,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:42:00,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:42:00,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:42:00,367 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 37 states. [2018-10-22 15:42:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:00,683 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-10-22 15:42:00,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:42:00,684 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 177 [2018-10-22 15:42:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:00,686 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:42:00,686 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:42:00,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:42:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:42:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2018-10-22 15:42:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-22 15:42:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-22 15:42:00,692 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2018-10-22 15:42:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:00,692 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-22 15:42:00,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:42:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-22 15:42:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-22 15:42:00,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:00,694 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:00,694 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:00,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:00,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1547923797, now seen corresponding path program 34 times [2018-10-22 15:42:00,694 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:00,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:00,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:00,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:00,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:01,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:01,769 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:01,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:42:01,984 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:42:01,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:01,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:02,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:02,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-22 15:42:02,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:42:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:42:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:42:02,148 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 38 states. [2018-10-22 15:42:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:02,433 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-22 15:42:02,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:42:02,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 182 [2018-10-22 15:42:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:02,436 INFO L225 Difference]: With dead ends: 197 [2018-10-22 15:42:02,436 INFO L226 Difference]: Without dead ends: 191 [2018-10-22 15:42:02,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:42:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-22 15:42:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2018-10-22 15:42:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-22 15:42:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-22 15:42:02,441 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2018-10-22 15:42:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:02,442 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-22 15:42:02,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:42:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-22 15:42:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-22 15:42:02,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:02,443 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:02,443 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:02,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1693883691, now seen corresponding path program 35 times [2018-10-22 15:42:02,444 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:02,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:02,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:03,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:03,265 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:03,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:05,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-22 15:42:05,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:05,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:06,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:06,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-22 15:42:06,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:42:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:42:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:42:06,012 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 39 states. [2018-10-22 15:42:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:06,345 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-22 15:42:06,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:42:06,346 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 187 [2018-10-22 15:42:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:06,347 INFO L225 Difference]: With dead ends: 202 [2018-10-22 15:42:06,347 INFO L226 Difference]: Without dead ends: 196 [2018-10-22 15:42:06,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:42:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-22 15:42:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2018-10-22 15:42:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-22 15:42:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-22 15:42:06,351 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2018-10-22 15:42:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:06,352 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-22 15:42:06,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:42:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-22 15:42:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-22 15:42:06,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:06,353 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:06,353 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:06,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:06,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1582078187, now seen corresponding path program 36 times [2018-10-22 15:42:06,354 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:06,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:06,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:06,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:06,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:07,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:07,057 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:07,065 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:43:06,978 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:43:06,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:07,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:07,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:07,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-22 15:43:07,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:43:07,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:43:07,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:43:07,103 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 40 states. [2018-10-22 15:43:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:08,397 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-22 15:43:08,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:43:08,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 192 [2018-10-22 15:43:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:08,399 INFO L225 Difference]: With dead ends: 207 [2018-10-22 15:43:08,399 INFO L226 Difference]: Without dead ends: 201 [2018-10-22 15:43:08,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:43:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-22 15:43:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2018-10-22 15:43:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-22 15:43:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-10-22 15:43:08,405 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2018-10-22 15:43:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:08,405 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-10-22 15:43:08,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:43:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-10-22 15:43:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-22 15:43:08,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:08,406 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:08,406 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:08,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:08,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2015740053, now seen corresponding path program 37 times [2018-10-22 15:43:08,407 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:08,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:08,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:08,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:08,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:09,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:09,117 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:09,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:09,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:09,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:09,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-22 15:43:09,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:43:09,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:43:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:43:09,316 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 41 states. [2018-10-22 15:43:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:09,769 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2018-10-22 15:43:09,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:43:09,770 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 197 [2018-10-22 15:43:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:09,771 INFO L225 Difference]: With dead ends: 212 [2018-10-22 15:43:09,772 INFO L226 Difference]: Without dead ends: 206 [2018-10-22 15:43:09,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:43:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-22 15:43:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2018-10-22 15:43:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-22 15:43:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-22 15:43:09,776 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2018-10-22 15:43:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:09,776 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-22 15:43:09,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:43:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-22 15:43:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:43:09,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:09,777 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:09,777 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:09,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:09,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1292161835, now seen corresponding path program 38 times [2018-10-22 15:43:09,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:09,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:09,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:10,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:10,728 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:10,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:43:10,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:43:10,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:10,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:10,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:10,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-22 15:43:10,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:43:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:43:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:43:10,959 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 42 states. [2018-10-22 15:43:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:12,100 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-22 15:43:12,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:43:12,101 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 202 [2018-10-22 15:43:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:12,103 INFO L225 Difference]: With dead ends: 217 [2018-10-22 15:43:12,103 INFO L226 Difference]: Without dead ends: 211 [2018-10-22 15:43:12,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:43:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-22 15:43:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2018-10-22 15:43:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-22 15:43:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-22 15:43:12,108 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2018-10-22 15:43:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:12,109 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-22 15:43:12,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:43:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-22 15:43:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-22 15:43:12,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:12,110 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:12,110 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:12,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1656221269, now seen corresponding path program 39 times [2018-10-22 15:43:12,110 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:12,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:12,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:12,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:12,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:12,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:12,956 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:12,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:44:11,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-22 15:44:11,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:11,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:11,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:11,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-22 15:44:11,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:44:11,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:44:11,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:44:11,525 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 43 states. [2018-10-22 15:44:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:11,833 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2018-10-22 15:44:11,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:44:11,833 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 207 [2018-10-22 15:44:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:11,835 INFO L225 Difference]: With dead ends: 222 [2018-10-22 15:44:11,835 INFO L226 Difference]: Without dead ends: 216 [2018-10-22 15:44:11,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:44:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-22 15:44:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2018-10-22 15:44:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-22 15:44:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-10-22 15:44:11,840 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 207 [2018-10-22 15:44:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-10-22 15:44:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:44:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-10-22 15:44:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-22 15:44:11,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:11,842 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:11,842 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:11,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1063861611, now seen corresponding path program 40 times [2018-10-22 15:44:11,843 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:11,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:11,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:11,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:11,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:12,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:12,773 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:12,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:44:13,053 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:44:13,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:13,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:13,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:13,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-22 15:44:13,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:44:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:44:13,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:44:13,173 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 44 states. [2018-10-22 15:44:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:13,546 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-10-22 15:44:13,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:44:13,547 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2018-10-22 15:44:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:13,548 INFO L225 Difference]: With dead ends: 227 [2018-10-22 15:44:13,548 INFO L226 Difference]: Without dead ends: 221 [2018-10-22 15:44:13,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:44:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-22 15:44:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2018-10-22 15:44:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-22 15:44:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-22 15:44:13,553 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 212 [2018-10-22 15:44:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:13,554 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-22 15:44:13,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:44:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-22 15:44:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-22 15:44:13,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:13,555 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:13,555 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:13,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1648628715, now seen corresponding path program 41 times [2018-10-22 15:44:13,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:13,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:13,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:13,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:13,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:14,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:14,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:14,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:44:21,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-22 15:44:21,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:21,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:21,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:44:21,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-22 15:44:21,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:44:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:44:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:44:21,641 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 45 states. [2018-10-22 15:44:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:21,933 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-22 15:44:21,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:44:21,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 217 [2018-10-22 15:44:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:21,935 INFO L225 Difference]: With dead ends: 232 [2018-10-22 15:44:21,935 INFO L226 Difference]: Without dead ends: 226 [2018-10-22 15:44:21,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:44:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-22 15:44:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2018-10-22 15:44:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-22 15:44:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-22 15:44:21,940 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 217 [2018-10-22 15:44:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:21,941 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-22 15:44:21,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:44:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-22 15:44:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-22 15:44:21,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:21,942 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:21,943 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:21,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1878906795, now seen corresponding path program 42 times [2018-10-22 15:44:21,943 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:21,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:21,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:21,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:21,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:44:22,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:22,923 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:22,930 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown