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/loops/linear_search_false-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:45:02,009 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:45:02,011 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:45:02,026 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:45:02,026 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:45:02,027 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:45:02,029 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:45:02,031 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:45:02,032 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:45:02,033 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:45:02,034 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:45:02,035 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:45:02,036 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:45:02,037 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:45:02,038 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:45:02,039 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:45:02,040 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:45:02,042 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:45:02,044 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:45:02,046 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:45:02,047 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:45:02,049 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:45:02,052 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 11:45:02,052 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 11:45:02,053 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 11:45:02,054 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 11:45:02,055 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 11:45:02,056 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 11:45:02,057 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 11:45:02,058 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 11:45:02,059 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 11:45:02,060 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 11:45:02,060 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 11:45:02,060 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 11:45:02,061 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 11:45:02,062 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 11:45:02,062 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:45:02,089 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:45:02,089 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:45:02,090 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:45:02,090 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:45:02,094 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:45:02,094 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:45:02,094 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:45:02,094 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:45:02,095 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:45:02,095 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:45:02,095 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:45:02,095 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:45:02,095 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:45:02,096 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:45:02,097 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:45:02,097 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:45:02,097 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:45:02,097 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:45:02,098 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:45:02,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:45:02,099 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:45:02,100 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:45:02,100 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:45:02,100 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:45:02,100 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:45:02,101 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:45:02,101 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:45:02,101 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:45:02,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:45:02,173 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:45:02,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:45:02,179 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:45:02,179 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:45:02,180 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/linear_search_false-unreach-call.i [2018-10-24 11:45:02,243 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/07d26e1b0/fc83339bd67749d1bc2eb4feba646f9f/FLAG3f98a7743 [2018-10-24 11:45:02,776 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:45:02,777 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search_false-unreach-call.i [2018-10-24 11:45:02,784 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/07d26e1b0/fc83339bd67749d1bc2eb4feba646f9f/FLAG3f98a7743 [2018-10-24 11:45:02,807 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/07d26e1b0/fc83339bd67749d1bc2eb4feba646f9f [2018-10-24 11:45:02,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:45:02,822 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:45:02,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:45:02,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:45:02,828 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:45:02,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:02" (1/1) ... [2018-10-24 11:45:02,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a95b4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:02, skipping insertion in model container [2018-10-24 11:45:02,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:02" (1/1) ... [2018-10-24 11:45:02,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:45:02,866 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:45:03,041 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:45:03,051 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:45:03,072 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:45:03,090 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:45:03,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03 WrapperNode [2018-10-24 11:45:03,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:45:03,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:45:03,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:45:03,092 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:45:03,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:45:03,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:45:03,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:45:03,140 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:45:03,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:45:03,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:45:03,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:45:03,183 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:45:03,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:45:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:45:03,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:45:03,689 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:45:03,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:03 BoogieIcfgContainer [2018-10-24 11:45:03,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:45:03,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:45:03,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:45:03,694 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:45:03,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:45:02" (1/3) ... [2018-10-24 11:45:03,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51daa308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:03, skipping insertion in model container [2018-10-24 11:45:03,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (2/3) ... [2018-10-24 11:45:03,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51daa308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:03, skipping insertion in model container [2018-10-24 11:45:03,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:03" (3/3) ... [2018-10-24 11:45:03,698 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search_false-unreach-call.i [2018-10-24 11:45:03,709 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:45:03,718 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:45:03,737 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:45:03,769 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:45:03,770 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:45:03,770 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:45:03,770 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:45:03,770 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:45:03,770 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:45:03,770 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:45:03,771 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:45:03,771 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:45:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-10-24 11:45:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 11:45:03,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:03,793 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:03,795 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:03,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1826021660, now seen corresponding path program 1 times [2018-10-24 11:45:03,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:03,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:03,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:03,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:03,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:03,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:03,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:45:03,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:45:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:45:04,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:45:04,008 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2018-10-24 11:45:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:04,031 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-24 11:45:04,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:45:04,034 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-24 11:45:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:04,053 INFO L225 Difference]: With dead ends: 25 [2018-10-24 11:45:04,054 INFO L226 Difference]: Without dead ends: 12 [2018-10-24 11:45:04,058 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 [2018-10-24 11:45:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-24 11:45:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-24 11:45:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-24 11:45:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2018-10-24 11:45:04,099 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2018-10-24 11:45:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:04,100 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2018-10-24 11:45:04,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:45:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2018-10-24 11:45:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 11:45:04,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:04,101 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:04,102 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:04,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash -408232241, now seen corresponding path program 1 times [2018-10-24 11:45:04,102 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:04,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:04,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:04,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:04,353 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:04,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:45:04,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:45:04,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:45:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:45:04,356 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 3 states. [2018-10-24 11:45:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:04,486 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-10-24 11:45:04,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:45:04,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-10-24 11:45:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:04,489 INFO L225 Difference]: With dead ends: 25 [2018-10-24 11:45:04,489 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 11:45:04,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:45:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 11:45:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2018-10-24 11:45:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-24 11:45:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2018-10-24 11:45:04,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2018-10-24 11:45:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:04,500 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2018-10-24 11:45:04,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:45:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2018-10-24 11:45:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 11:45:04,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:04,501 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:04,501 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:04,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:04,503 INFO L82 PathProgramCache]: Analyzing trace with hash -408291823, now seen corresponding path program 1 times [2018-10-24 11:45:04,503 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:04,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:04,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:04,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:04,674 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:04,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 11:45:04,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:45:04,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:45:04,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:45:04,675 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 4 states. [2018-10-24 11:45:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:04,721 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2018-10-24 11:45:04,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:45:04,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-24 11:45:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:04,723 INFO L225 Difference]: With dead ends: 21 [2018-10-24 11:45:04,723 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 11:45:04,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 11:45:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-24 11:45:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:45:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2018-10-24 11:45:04,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2018-10-24 11:45:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:04,728 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2018-10-24 11:45:04,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:45:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2018-10-24 11:45:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:45:04,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:04,729 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:04,729 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:04,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:04,730 INFO L82 PathProgramCache]: Analyzing trace with hash -380457259, now seen corresponding path program 1 times [2018-10-24 11:45:04,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:04,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:04,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:04,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:04,924 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:04,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 11:45:04,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:45:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:45:04,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:45:04,926 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2018-10-24 11:45:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:05,049 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2018-10-24 11:45:05,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:45:05,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-24 11:45:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:05,051 INFO L225 Difference]: With dead ends: 37 [2018-10-24 11:45:05,051 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 11:45:05,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 11:45:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-24 11:45:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-24 11:45:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-24 11:45:05,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2018-10-24 11:45:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:05,057 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-24 11:45:05,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:45:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-24 11:45:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:45:05,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:05,059 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:05,059 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:05,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:05,060 INFO L82 PathProgramCache]: Analyzing trace with hash -323198957, now seen corresponding path program 1 times [2018-10-24 11:45:05,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:05,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:05,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:05,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:05,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:05,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:05,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 11:45:05,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:45:05,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:45:05,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:45:05,327 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2018-10-24 11:45:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:05,577 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-10-24 11:45:05,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:45:05,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-24 11:45:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:05,580 INFO L225 Difference]: With dead ends: 40 [2018-10-24 11:45:05,580 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 11:45:05,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:45:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 11:45:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2018-10-24 11:45:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 11:45:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-24 11:45:05,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2018-10-24 11:45:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:05,590 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-24 11:45:05,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:45:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-24 11:45:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:45:05,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:05,591 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:05,591 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:05,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash 299601111, now seen corresponding path program 1 times [2018-10-24 11:45:05,592 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:05,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:05,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:05,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:05,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:06,058 WARN L179 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-24 11:45:06,580 WARN L179 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2018-10-24 11:45:06,793 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2018-10-24 11:45:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:06,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:06,881 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:06,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:06,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:07,244 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 11:45:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:07,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:07,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-10-24 11:45:07,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:45:07,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:45:07,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:45:07,610 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2018-10-24 11:45:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:07,960 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-24 11:45:07,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:45:07,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2018-10-24 11:45:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:07,962 INFO L225 Difference]: With dead ends: 36 [2018-10-24 11:45:07,962 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 11:45:07,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:45:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 11:45:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-10-24 11:45:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-24 11:45:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-10-24 11:45:07,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-10-24 11:45:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:07,969 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-10-24 11:45:07,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:45:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-10-24 11:45:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:45:07,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:07,970 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:07,970 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:07,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:07,971 INFO L82 PathProgramCache]: Analyzing trace with hash 356859413, now seen corresponding path program 1 times [2018-10-24 11:45:07,971 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:07,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:07,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:07,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:07,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:08,227 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 26 [2018-10-24 11:45:08,502 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2018-10-24 11:45:08,692 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 22 [2018-10-24 11:45:08,852 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2018-10-24 11:45:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:08,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:08,856 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:08,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:08,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:08,939 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 11:45:08,939 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:08,973 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-10-24 11:45:08,977 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 11:45:08,978 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:08,981 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:08,994 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:08,994 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:109, output treesize:24 [2018-10-24 11:45:09,068 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2018-10-24 11:45:09,075 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2018-10-24 11:45:09,076 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:09,085 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:09,121 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2018-10-24 11:45:09,126 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2018-10-24 11:45:09,127 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:09,135 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:09,184 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-10-24 11:45:09,184 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:85, output treesize:44 [2018-10-24 11:45:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:09,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:09,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2018-10-24 11:45:09,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:45:09,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:45:09,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:45:09,462 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 11 states. [2018-10-24 11:45:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:09,969 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-24 11:45:09,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:45:09,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2018-10-24 11:45:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:09,970 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:45:09,971 INFO L226 Difference]: Without dead ends: 25 [2018-10-24 11:45:09,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:45:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-24 11:45:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-24 11:45:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-24 11:45:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-24 11:45:09,977 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2018-10-24 11:45:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:09,977 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-24 11:45:09,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:45:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-24 11:45:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:45:09,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:09,979 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:09,979 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:09,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1720764661, now seen corresponding path program 1 times [2018-10-24 11:45:09,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:09,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:09,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:09,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:09,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:10,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:10,090 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:10,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:10,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:10,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:10,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-24 11:45:10,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:45:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:45:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:45:10,237 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-10-24 11:45:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:10,344 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-24 11:45:10,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:45:10,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-10-24 11:45:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:10,347 INFO L225 Difference]: With dead ends: 45 [2018-10-24 11:45:10,347 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 11:45:10,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:45:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 11:45:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2018-10-24 11:45:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 11:45:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-24 11:45:10,353 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2018-10-24 11:45:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:10,354 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-24 11:45:10,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:45:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-24 11:45:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:45:10,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:10,355 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:10,355 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:10,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1097964593, now seen corresponding path program 2 times [2018-10-24 11:45:10,356 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:10,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:10,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:10,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:10,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:10,772 WARN L179 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-24 11:45:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:11,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:11,033 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:11,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:45:11,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-24 11:45:11,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:11,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:11,675 WARN L179 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-10-24 11:45:12,838 WARN L179 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2018-10-24 11:45:13,554 WARN L179 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-24 11:45:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-24 11:45:13,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:13,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2018-10-24 11:45:13,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:45:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:45:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:45:13,600 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 12 states. [2018-10-24 11:45:14,002 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2018-10-24 11:45:15,430 WARN L179 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-10-24 11:45:15,655 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2018-10-24 11:45:19,346 WARN L179 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2018-10-24 11:45:21,994 WARN L179 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2018-10-24 11:45:23,859 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2018-10-24 11:45:24,479 WARN L179 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-10-24 11:45:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:24,496 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-24 11:45:24,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:45:24,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2018-10-24 11:45:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:24,498 INFO L225 Difference]: With dead ends: 42 [2018-10-24 11:45:24,498 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 11:45:24,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:45:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 11:45:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2018-10-24 11:45:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 11:45:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-24 11:45:24,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-10-24 11:45:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:24,506 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-24 11:45:24,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:45:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-24 11:45:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:45:24,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:24,507 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:24,508 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:24,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1040706291, now seen corresponding path program 2 times [2018-10-24 11:45:24,508 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:24,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:24,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:24,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:24,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:31,426 WARN L179 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 119 DAG size of output: 49 [2018-10-24 11:45:32,291 WARN L179 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 68 [2018-10-24 11:45:32,916 WARN L179 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 65 [2018-10-24 11:45:38,191 WARN L179 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 174 DAG size of output: 109 [2018-10-24 11:45:39,563 WARN L179 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 71 [2018-10-24 11:45:40,258 WARN L179 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 67 [2018-10-24 11:45:40,612 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 45 [2018-10-24 11:45:40,986 WARN L179 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 31 [2018-10-24 11:45:41,315 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 41 [2018-10-24 11:45:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:41,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:41,611 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:41,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:45:41,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:45:41,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:41,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:41,677 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 11:45:41,677 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:41,679 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 11:45:41,679 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:41,750 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 38 [2018-10-24 11:45:41,753 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 11:45:41,753 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:41,765 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:41,770 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 35 [2018-10-24 11:45:41,773 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 11:45:41,774 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:41,784 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:41,816 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-24 11:45:41,816 INFO L202 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:286, output treesize:72 [2018-10-24 11:45:44,665 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2018-10-24 11:45:44,683 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2018-10-24 11:45:44,687 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:45:44,689 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 77 [2018-10-24 11:45:44,690 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:44,708 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:44,795 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2018-10-24 11:45:44,799 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 54 [2018-10-24 11:45:44,800 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:44,815 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:44,901 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2018-10-24 11:45:44,906 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:45:44,907 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 73 [2018-10-24 11:45:44,908 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:44,925 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:44,984 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2018-10-24 11:45:44,987 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:45:44,989 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 77 [2018-10-24 11:45:44,990 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-24 11:45:45,050 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:45:45,093 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2018-10-24 11:45:45,094 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:269, output treesize:130 [2018-10-24 11:45:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:48,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:48,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2018-10-24 11:45:48,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:45:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:45:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=351, Unknown=2, NotChecked=0, Total=420 [2018-10-24 11:45:48,094 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 21 states. [2018-10-24 11:45:48,324 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2018-10-24 11:45:48,524 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2018-10-24 11:45:54,820 WARN L179 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2018-10-24 11:45:55,281 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 42 [2018-10-24 11:45:57,042 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 43 [2018-10-24 11:45:58,801 WARN L179 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 49 [2018-10-24 11:45:59,063 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2018-10-24 11:46:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:00,115 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-10-24 11:46:00,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:46:00,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-24 11:46:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:00,116 INFO L225 Difference]: With dead ends: 43 [2018-10-24 11:46:00,116 INFO L226 Difference]: Without dead ends: 35 [2018-10-24 11:46:00,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=135, Invalid=617, Unknown=4, NotChecked=0, Total=756 [2018-10-24 11:46:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-24 11:46:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-24 11:46:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:46:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-24 11:46:00,123 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2018-10-24 11:46:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:00,123 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-24 11:46:00,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:46:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-24 11:46:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-24 11:46:00,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:00,124 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:00,125 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:00,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash -532415725, now seen corresponding path program 2 times [2018-10-24 11:46:00,125 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:00,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:00,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:00,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:00,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:46:00,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:00,766 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:00,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:46:00,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:46:00,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:46:00,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:46:00,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:00,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-10-24 11:46:00,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:46:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:46:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:46:00,882 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2018-10-24 11:46:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:01,191 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2018-10-24 11:46:01,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:46:01,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-24 11:46:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:01,192 INFO L225 Difference]: With dead ends: 44 [2018-10-24 11:46:01,192 INFO L226 Difference]: Without dead ends: 35 [2018-10-24 11:46:01,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:46:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-24 11:46:01,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-24 11:46:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:46:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-24 11:46:01,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2018-10-24 11:46:01,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:01,199 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-24 11:46:01,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:46:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-24 11:46:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-24 11:46:01,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:01,200 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:01,200 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:01,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1097890827, now seen corresponding path program 3 times [2018-10-24 11:46:01,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:01,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:01,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:01,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:01,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:46:02,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:02,230 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:02,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:46:02,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-24 11:46:02,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:46:02,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:46:02,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:02,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-10-24 11:46:02,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:46:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:46:02,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:46:02,555 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 11 states. [2018-10-24 11:46:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:02,745 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-24 11:46:02,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:46:02,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-10-24 11:46:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:02,747 INFO L225 Difference]: With dead ends: 55 [2018-10-24 11:46:02,747 INFO L226 Difference]: Without dead ends: 46 [2018-10-24 11:46:02,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:46:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-24 11:46:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2018-10-24 11:46:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-24 11:46:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-24 11:46:02,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2018-10-24 11:46:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:02,756 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-24 11:46:02,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:46:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-24 11:46:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-24 11:46:02,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:02,757 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:02,758 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:02,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:02,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1777949197, now seen corresponding path program 3 times [2018-10-24 11:46:02,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:02,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:02,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:02,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:02,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:07,776 WARN L179 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 136 DAG size of output: 43 [2018-10-24 11:46:12,083 WARN L179 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 163 DAG size of output: 49 [2018-10-24 11:46:26,644 WARN L179 SmtUtils]: Spent 14.48 s on a formula simplification. DAG size of input: 192 DAG size of output: 57 [2018-10-24 11:46:31,324 WARN L179 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 195 DAG size of output: 55 [2018-10-24 11:46:33,827 WARN L179 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 195 DAG size of output: 57 [2018-10-24 11:46:36,319 WARN L179 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 195 DAG size of output: 60 [2018-10-24 11:46:38,822 WARN L179 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 184 DAG size of output: 47 [2018-10-24 11:46:39,486 WARN L179 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 43 [2018-10-24 11:46:40,225 WARN L179 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 47 [2018-10-24 11:46:40,535 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 39 [2018-10-24 11:46:43,188 WARN L179 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 162 DAG size of output: 33 [2018-10-24 11:46:47,479 WARN L179 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 148 DAG size of output: 32 [2018-10-24 11:47:20,122 WARN L179 SmtUtils]: Spent 32.51 s on a formula simplification. DAG size of input: 167 DAG size of output: 48 [2018-10-24 11:47:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:47:20,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:47:20,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:47:20,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:47:38,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-24 11:47:38,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:47:38,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:47:38,579 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 11:47:38,579 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,581 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 11:47:38,581 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,586 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2018-10-24 11:47:38,591 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:38,591 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,620 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,625 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 59 [2018-10-24 11:47:38,634 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:38,634 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,657 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,664 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 56 [2018-10-24 11:47:38,669 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:38,670 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,700 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,703 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 11:47:38,703 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,709 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2018-10-24 11:47:38,713 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:38,713 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,755 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,791 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2018-10-24 11:47:38,805 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:38,806 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,848 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,853 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 59 [2018-10-24 11:47:38,856 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:38,856 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,895 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,901 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 11:47:38,901 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:38,947 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2018-10-24 11:47:38,964 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:38,964 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:39,233 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:39,266 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 56 [2018-10-24 11:47:39,281 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:47:39,282 INFO L267 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:39,309 INFO L267 ElimStorePlain]: Start of recursive call 20: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:45,593 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2018-10-24 11:47:45,594 INFO L202 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:1168, output treesize:193 [2018-10-24 11:47:45,775 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2018-10-24 11:47:46,027 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-10-24 11:47:46,260 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-10-24 11:47:47,226 WARN L179 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2018-10-24 11:47:48,712 WARN L179 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 62 [2018-10-24 11:47:49,159 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-10-24 11:47:50,097 WARN L179 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2018-10-24 11:47:50,769 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2018-10-24 11:47:56,857 WARN L179 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2018-10-24 11:47:56,880 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2018-10-24 11:47:56,901 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:56,902 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:56,903 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:56,904 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:56,912 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 173 [2018-10-24 11:47:56,913 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,127 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,338 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 101 [2018-10-24 11:47:57,347 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,348 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,368 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,374 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 157 [2018-10-24 11:47:57,375 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,435 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,620 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 85 [2018-10-24 11:47:57,658 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,659 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,660 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,661 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,662 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,663 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,674 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 177 [2018-10-24 11:47:57,675 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,727 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,730 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 83 [2018-10-24 11:47:57,739 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,740 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,741 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,742 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,742 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,744 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:47:57,754 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 177 [2018-10-24 11:47:57,756 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,838 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:47:57,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2018-10-24 11:47:57,965 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 10 variables, input treesize:425, output treesize:227 [2018-10-24 11:48:01,289 WARN L179 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2018-10-24 11:48:02,284 WARN L179 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-10-24 11:48:08,868 WARN L179 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2018-10-24 11:48:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:08,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:08,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2018-10-24 11:48:08,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:48:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:48:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=690, Unknown=1, NotChecked=0, Total=812 [2018-10-24 11:48:08,908 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-10-24 11:48:09,166 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-10-24 11:48:13,468 WARN L179 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2018-10-24 11:48:14,779 WARN L179 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2018-10-24 11:48:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:15,067 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2018-10-24 11:48:15,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:48:15,068 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2018-10-24 11:48:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:15,069 INFO L225 Difference]: With dead ends: 53 [2018-10-24 11:48:15,069 INFO L226 Difference]: Without dead ends: 45 [2018-10-24 11:48:15,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 102.5s TimeCoverageRelationStatistics Valid=147, Invalid=844, Unknown=1, NotChecked=0, Total=992 [2018-10-24 11:48:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-24 11:48:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-24 11:48:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 11:48:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-24 11:48:15,077 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 30 [2018-10-24 11:48:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:15,077 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-24 11:48:15,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:48:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-24 11:48:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 11:48:15,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:15,079 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:48:15,079 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:15,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:15,079 INFO L82 PathProgramCache]: Analyzing trace with hash -817506797, now seen corresponding path program 4 times [2018-10-24 11:48:15,080 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:15,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:15,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:15,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:15,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:48:15,524 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 9 [2018-10-24 11:48:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:18,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:48:18,769 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:48:18,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:48:18,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:48:18,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:48:18,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:48:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:18,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:18,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-24 11:48:18,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:48:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:48:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2018-10-24 11:48:18,883 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 13 states. [2018-10-24 11:48:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:19,051 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-10-24 11:48:19,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:48:19,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-10-24 11:48:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:19,055 INFO L225 Difference]: With dead ends: 54 [2018-10-24 11:48:19,055 INFO L226 Difference]: Without dead ends: 45 [2018-10-24 11:48:19,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2018-10-24 11:48:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-24 11:48:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-24 11:48:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 11:48:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-24 11:48:19,068 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2018-10-24 11:48:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:19,069 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-24 11:48:19,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:48:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-24 11:48:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 11:48:19,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:19,070 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:48:19,070 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:19,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1080000779, now seen corresponding path program 5 times [2018-10-24 11:48:19,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:19,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:19,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:19,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:19,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:48:19,374 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 9 [2018-10-24 11:48:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:23,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:48:23,071 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:48:23,079 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:48:23,389 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-24 11:48:23,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:48:23,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:48:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:23,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:23,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-10-24 11:48:23,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:48:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:48:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2018-10-24 11:48:23,513 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 15 states. [2018-10-24 11:48:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:23,780 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-24 11:48:23,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:48:23,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-24 11:48:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:23,788 INFO L225 Difference]: With dead ends: 65 [2018-10-24 11:48:23,788 INFO L226 Difference]: Without dead ends: 56 [2018-10-24 11:48:23,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2018-10-24 11:48:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-24 11:48:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2018-10-24 11:48:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-24 11:48:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-24 11:48:23,797 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2018-10-24 11:48:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:23,797 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-24 11:48:23,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:48:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-24 11:48:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 11:48:23,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:23,798 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:48:23,802 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:23,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1760059149, now seen corresponding path program 4 times [2018-10-24 11:48:23,802 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:23,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:23,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:23,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:23,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:48:30,534 WARN L179 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 127 DAG size of output: 43 [2018-10-24 11:48:36,859 WARN L179 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 159 DAG size of output: 49 [2018-10-24 11:48:37,987 WARN L179 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 191 DAG size of output: 62 [2018-10-24 11:48:42,492 WARN L179 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 195 DAG size of output: 62 [2018-10-24 11:48:45,154 WARN L179 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 196 DAG size of output: 63 [2018-10-24 11:48:52,069 WARN L179 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 218 DAG size of output: 65 [2018-10-24 11:48:59,357 WARN L179 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 211 DAG size of output: 56 [2018-10-24 11:49:06,670 WARN L179 SmtUtils]: Spent 7.25 s on a formula simplification. DAG size of input: 200 DAG size of output: 52 [2018-10-24 11:49:18,256 WARN L179 SmtUtils]: Spent 11.42 s on a formula simplification. DAG size of input: 201 DAG size of output: 52 [2018-10-24 11:49:24,725 WARN L179 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 180 DAG size of output: 49 [2018-10-24 11:49:27,175 WARN L179 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 185 DAG size of output: 48 [2018-10-24 11:49:27,646 WARN L179 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 34 [2018-10-24 11:49:34,040 WARN L179 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 151 DAG size of output: 33 Received shutdown request... [2018-10-24 11:49:38,408 WARN L187 SmtUtils]: Removed 25 from assertion stack [2018-10-24 11:49:38,409 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 11:49:38,413 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 11:49:38,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:49:38 BoogieIcfgContainer [2018-10-24 11:49:38,413 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 11:49:38,414 INFO L168 Benchmark]: Toolchain (without parser) took 275593.48 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 969.9 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -239.8 MB). Peak memory consumption was 730.1 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:38,415 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:49:38,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:38,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:49:38,416 INFO L168 Benchmark]: Boogie Preprocessor took 42.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:49:38,416 INFO L168 Benchmark]: RCFGBuilder took 507.28 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 714.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -762.1 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:38,417 INFO L168 Benchmark]: TraceAbstraction took 274722.37 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 255.9 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 511.8 MB). Peak memory consumption was 767.6 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:38,420 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 507.28 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 714.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -762.1 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 274722.37 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 255.9 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 511.8 MB). Peak memory consumption was 767.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 7,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 162. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. TIMEOUT Result, 274.6s OverallTime, 16 OverallIterations, 7 TraceHistogramMax, 31.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 191 SDtfs, 237 SDslu, 746 SDs, 0 SdLazy, 1537 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 384 GetRequests, 200 SyntacticMatches, 30 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 160.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 70 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 19.2s SatisfiabilityAnalysisTime, 148.3s InterpolantComputationTime, 557 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 532 ConstructedInterpolants, 38 QuantifiedInterpolants, 308229 SizeOfPredicates, 92 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 283 ConjunctsInUnsatCore, 25 InterpolantComputations, 5 PerfectInterpolantSequences, 183/678 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown