java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:03:31,018 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:03:31,020 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:03:31,036 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:03:31,036 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:03:31,037 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:03:31,039 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:03:31,040 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:03:31,042 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:03:31,043 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:03:31,044 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:03:31,044 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:03:31,045 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:03:31,046 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:03:31,048 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:03:31,049 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:03:31,050 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:03:31,051 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:03:31,053 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:03:31,055 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:03:31,056 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:03:31,057 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:03:31,059 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:03:31,059 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:03:31,060 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:03:31,061 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:03:31,061 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:03:31,062 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:03:31,063 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:03:31,064 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:03:31,064 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:03:31,065 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:03:31,065 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:03:31,065 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:03:31,066 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:03:31,067 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:03:31,068 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:03:31,085 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:03:31,086 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:03:31,087 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:03:31,087 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:03:31,087 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:03:31,088 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:03:31,088 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:03:31,088 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:03:31,088 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:03:31,089 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:03:31,089 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:03:31,090 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:03:31,090 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:03:31,090 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:03:31,090 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:03:31,091 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:03:31,091 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:03:31,091 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:03:31,091 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:03:31,091 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:03:31,092 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:03:31,092 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:03:31,092 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:03:31,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:03:31,092 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:03:31,093 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:03:31,093 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:03:31,093 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:03:31,093 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:03:31,094 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:03:31,094 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:03:31,094 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:03:31,094 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:03:31,164 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:03:31,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:03:31,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:03:31,191 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:03:31,191 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:03:31,192 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-09-14 16:03:31,531 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17bd764d9/bce9984b3b2f419997e081a5f86b381a/FLAG684c9a73a [2018-09-14 16:03:31,880 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:03:31,882 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-09-14 16:03:31,904 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17bd764d9/bce9984b3b2f419997e081a5f86b381a/FLAG684c9a73a [2018-09-14 16:03:31,930 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17bd764d9/bce9984b3b2f419997e081a5f86b381a [2018-09-14 16:03:31,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:03:31,947 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:03:31,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:03:31,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:03:31,957 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:03:31,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:03:31" (1/1) ... [2018-09-14 16:03:31,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2240911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:31, skipping insertion in model container [2018-09-14 16:03:31,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:03:31" (1/1) ... [2018-09-14 16:03:31,975 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:03:32,738 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:03:32,761 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:03:33,019 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:03:33,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33 WrapperNode [2018-09-14 16:03:33,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:03:33,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:03:33,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:03:33,099 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:03:33,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:03:33,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:03:33,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:03:33,261 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:03:33,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... [2018-09-14 16:03:33,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:03:33,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:03:33,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:03:33,657 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:03:33,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:03:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:03:33,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:03:33,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:03:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:03:33,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:03:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:03:33,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:03:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:03:38,677 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:03:38,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:03:38 BoogieIcfgContainer [2018-09-14 16:03:38,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:03:38,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:03:38,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:03:38,686 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:03:38,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:03:31" (1/3) ... [2018-09-14 16:03:38,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9d87f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:03:38, skipping insertion in model container [2018-09-14 16:03:38,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:33" (2/3) ... [2018-09-14 16:03:38,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9d87f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:03:38, skipping insertion in model container [2018-09-14 16:03:38,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:03:38" (3/3) ... [2018-09-14 16:03:38,692 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label21_true-unreach-call.c [2018-09-14 16:03:38,704 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:03:38,717 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:03:38,790 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:03:38,791 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:03:38,791 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:03:38,791 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:03:38,792 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:03:38,792 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:03:38,792 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:03:38,792 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:03:38,792 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:03:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:03:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-14 16:03:38,871 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:38,873 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:38,874 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:38,879 INFO L82 PathProgramCache]: Analyzing trace with hash 79824004, now seen corresponding path program 1 times [2018-09-14 16:03:38,881 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:38,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:38,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:38,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:38,932 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:39,914 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:03:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:40,160 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:40,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:03:40,161 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:40,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:03:40,184 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:03:40,185 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:40,188 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:03:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:42,015 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-09-14 16:03:42,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:03:42,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2018-09-14 16:03:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:42,042 INFO L225 Difference]: With dead ends: 848 [2018-09-14 16:03:42,043 INFO L226 Difference]: Without dead ends: 534 [2018-09-14 16:03:42,052 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-09-14 16:03:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-09-14 16:03:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-14 16:03:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-09-14 16:03:42,142 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 209 [2018-09-14 16:03:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:42,144 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-09-14 16:03:42,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:03:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-09-14 16:03:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-14 16:03:42,154 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:42,154 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:42,155 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:42,155 INFO L82 PathProgramCache]: Analyzing trace with hash 909218688, now seen corresponding path program 1 times [2018-09-14 16:03:42,156 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:42,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:42,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:42,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:42,157 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:42,633 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:42,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:03:42,634 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:42,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:03:42,638 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:03:42,639 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:42,639 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-09-14 16:03:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:45,012 INFO L93 Difference]: Finished difference Result 1493 states and 2512 transitions. [2018-09-14 16:03:45,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:03:45,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2018-09-14 16:03:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:45,020 INFO L225 Difference]: With dead ends: 1493 [2018-09-14 16:03:45,021 INFO L226 Difference]: Without dead ends: 967 [2018-09-14 16:03:45,024 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2018-09-14 16:03:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 951. [2018-09-14 16:03:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-09-14 16:03:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1540 transitions. [2018-09-14 16:03:45,069 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1540 transitions. Word has length 222 [2018-09-14 16:03:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:45,069 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 1540 transitions. [2018-09-14 16:03:45,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:03:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1540 transitions. [2018-09-14 16:03:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-14 16:03:45,077 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:45,077 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:45,078 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:45,078 INFO L82 PathProgramCache]: Analyzing trace with hash 262134433, now seen corresponding path program 1 times [2018-09-14 16:03:45,078 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:45,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:45,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:45,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:45,080 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:45,341 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:03:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:45,462 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:45,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:03:45,463 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:45,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:03:45,464 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:03:45,464 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:03:45,464 INFO L87 Difference]: Start difference. First operand 951 states and 1540 transitions. Second operand 6 states. [2018-09-14 16:03:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:48,973 INFO L93 Difference]: Finished difference Result 2784 states and 4694 transitions. [2018-09-14 16:03:48,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:03:48,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 237 [2018-09-14 16:03:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:48,992 INFO L225 Difference]: With dead ends: 2784 [2018-09-14 16:03:48,992 INFO L226 Difference]: Without dead ends: 1839 [2018-09-14 16:03:48,997 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:03:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2018-09-14 16:03:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1809. [2018-09-14 16:03:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1809 states. [2018-09-14 16:03:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2782 transitions. [2018-09-14 16:03:49,079 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2782 transitions. Word has length 237 [2018-09-14 16:03:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:49,080 INFO L480 AbstractCegarLoop]: Abstraction has 1809 states and 2782 transitions. [2018-09-14 16:03:49,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:03:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2782 transitions. [2018-09-14 16:03:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-14 16:03:49,091 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:49,091 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:49,091 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash -789776746, now seen corresponding path program 1 times [2018-09-14 16:03:49,092 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:49,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:49,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:49,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:49,093 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:49,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:49,595 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:03:49,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:49,605 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:49,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:03:50,204 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:03:51,283 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:03:51,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:03:51,284 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:51,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:03:51,285 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:03:51,285 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:03:51,287 INFO L87 Difference]: Start difference. First operand 1809 states and 2782 transitions. Second operand 5 states. [2018-09-14 16:03:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:54,237 INFO L93 Difference]: Finished difference Result 5676 states and 8986 transitions. [2018-09-14 16:03:54,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:03:54,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2018-09-14 16:03:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:54,270 INFO L225 Difference]: With dead ends: 5676 [2018-09-14 16:03:54,270 INFO L226 Difference]: Without dead ends: 3873 [2018-09-14 16:03:54,280 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 504 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:03:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2018-09-14 16:03:54,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3650. [2018-09-14 16:03:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3650 states. [2018-09-14 16:03:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5476 transitions. [2018-09-14 16:03:54,411 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5476 transitions. Word has length 256 [2018-09-14 16:03:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:54,411 INFO L480 AbstractCegarLoop]: Abstraction has 3650 states and 5476 transitions. [2018-09-14 16:03:54,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:03:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5476 transitions. [2018-09-14 16:03:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-14 16:03:54,430 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:54,430 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:54,431 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:54,431 INFO L82 PathProgramCache]: Analyzing trace with hash 182111589, now seen corresponding path program 1 times [2018-09-14 16:03:54,431 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:54,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:54,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:54,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:54,434 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:54,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:54,965 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:03:54,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:54,983 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:55,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:03:55,308 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:03:55,469 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:03:55,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-14 16:03:55,470 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:55,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:03:55,470 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:03:55,471 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:03:55,471 INFO L87 Difference]: Start difference. First operand 3650 states and 5476 transitions. Second operand 3 states. [2018-09-14 16:03:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:57,309 INFO L93 Difference]: Finished difference Result 7297 states and 10977 transitions. [2018-09-14 16:03:57,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:03:57,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2018-09-14 16:03:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:57,329 INFO L225 Difference]: With dead ends: 7297 [2018-09-14 16:03:57,329 INFO L226 Difference]: Without dead ends: 3653 [2018-09-14 16:03:57,343 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:03:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3653 states. [2018-09-14 16:03:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3653 to 3650. [2018-09-14 16:03:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3650 states. [2018-09-14 16:03:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5083 transitions. [2018-09-14 16:03:57,448 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5083 transitions. Word has length 256 [2018-09-14 16:03:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:57,449 INFO L480 AbstractCegarLoop]: Abstraction has 3650 states and 5083 transitions. [2018-09-14 16:03:57,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:03:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5083 transitions. [2018-09-14 16:03:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-14 16:03:57,461 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:57,461 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:57,462 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash 251638924, now seen corresponding path program 1 times [2018-09-14 16:03:57,462 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:57,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:57,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:57,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:57,463 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:58,229 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:58,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:03:58,229 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:58,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:03:58,230 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:03:58,230 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:03:58,231 INFO L87 Difference]: Start difference. First operand 3650 states and 5083 transitions. Second operand 4 states. [2018-09-14 16:04:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:01,437 INFO L93 Difference]: Finished difference Result 10377 states and 14807 transitions. [2018-09-14 16:04:01,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:04:01,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2018-09-14 16:04:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:01,470 INFO L225 Difference]: With dead ends: 10377 [2018-09-14 16:04:01,471 INFO L226 Difference]: Without dead ends: 6733 [2018-09-14 16:04:01,484 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:04:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6733 states. [2018-09-14 16:04:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6733 to 6657. [2018-09-14 16:04:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6657 states. [2018-09-14 16:04:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9251 transitions. [2018-09-14 16:04:01,665 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9251 transitions. Word has length 255 [2018-09-14 16:04:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:01,666 INFO L480 AbstractCegarLoop]: Abstraction has 6657 states and 9251 transitions. [2018-09-14 16:04:01,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:04:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9251 transitions. [2018-09-14 16:04:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-14 16:04:01,684 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:01,684 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:01,684 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash -337628274, now seen corresponding path program 1 times [2018-09-14 16:04:01,685 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:01,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:01,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:01,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:01,686 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:02,195 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 16:04:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:04:02,464 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:04:02,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:04:02,464 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:02,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:04:02,465 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:04:02,465 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:04:02,465 INFO L87 Difference]: Start difference. First operand 6657 states and 9251 transitions. Second operand 6 states. [2018-09-14 16:04:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:05,001 INFO L93 Difference]: Finished difference Result 14108 states and 19863 transitions. [2018-09-14 16:04:05,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 16:04:05,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 257 [2018-09-14 16:04:05,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:05,035 INFO L225 Difference]: With dead ends: 14108 [2018-09-14 16:04:05,035 INFO L226 Difference]: Without dead ends: 7437 [2018-09-14 16:04:05,051 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:04:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2018-09-14 16:04:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7259. [2018-09-14 16:04:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2018-09-14 16:04:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 9938 transitions. [2018-09-14 16:04:05,246 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 9938 transitions. Word has length 257 [2018-09-14 16:04:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:05,247 INFO L480 AbstractCegarLoop]: Abstraction has 7259 states and 9938 transitions. [2018-09-14 16:04:05,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:04:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 9938 transitions. [2018-09-14 16:04:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-14 16:04:05,265 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:05,266 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:05,266 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:05,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1081955538, now seen corresponding path program 1 times [2018-09-14 16:04:05,267 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:05,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:05,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:05,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:05,268 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:04:05,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:05,888 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:05,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:05,905 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:06,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:04:06,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:04:07,094 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:04:07,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-09-14 16:04:07,094 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:07,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:04:07,095 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:04:07,095 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:04:07,096 INFO L87 Difference]: Start difference. First operand 7259 states and 9938 transitions. Second operand 4 states. [2018-09-14 16:04:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:08,776 INFO L93 Difference]: Finished difference Result 16209 states and 22406 transitions. [2018-09-14 16:04:08,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:04:08,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 288 [2018-09-14 16:04:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:08,826 INFO L225 Difference]: With dead ends: 16209 [2018-09-14 16:04:08,827 INFO L226 Difference]: Without dead ends: 8956 [2018-09-14 16:04:08,849 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 573 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:04:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2018-09-14 16:04:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 8953. [2018-09-14 16:04:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8953 states. [2018-09-14 16:04:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 12158 transitions. [2018-09-14 16:04:09,072 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 12158 transitions. Word has length 288 [2018-09-14 16:04:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:09,073 INFO L480 AbstractCegarLoop]: Abstraction has 8953 states and 12158 transitions. [2018-09-14 16:04:09,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:04:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 12158 transitions. [2018-09-14 16:04:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-14 16:04:09,098 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:09,099 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:09,099 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash 960946226, now seen corresponding path program 1 times [2018-09-14 16:04:09,100 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:09,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:09,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:09,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:09,101 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:09,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:09,836 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:09,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:09,844 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:10,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:10,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:10,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:10,635 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:10,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:10,663 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:11,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:11,594 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-09-14 16:04:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 89 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:11,724 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:11,879 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 16:04:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:12,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:12,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 10 [2018-09-14 16:04:12,207 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:12,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:04:12,208 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:04:12,209 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:04:12,209 INFO L87 Difference]: Start difference. First operand 8953 states and 12158 transitions. Second operand 7 states. [2018-09-14 16:04:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:16,859 INFO L93 Difference]: Finished difference Result 30766 states and 47122 transitions. [2018-09-14 16:04:16,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:04:16,859 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 303 [2018-09-14 16:04:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:17,106 INFO L225 Difference]: With dead ends: 30766 [2018-09-14 16:04:17,107 INFO L226 Difference]: Without dead ends: 21819 [2018-09-14 16:04:17,149 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1206 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:04:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21819 states. [2018-09-14 16:04:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21819 to 20812. [2018-09-14 16:04:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20812 states. [2018-09-14 16:04:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20812 states to 20812 states and 27997 transitions. [2018-09-14 16:04:17,850 INFO L78 Accepts]: Start accepts. Automaton has 20812 states and 27997 transitions. Word has length 303 [2018-09-14 16:04:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:17,851 INFO L480 AbstractCegarLoop]: Abstraction has 20812 states and 27997 transitions. [2018-09-14 16:04:17,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:04:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 20812 states and 27997 transitions. [2018-09-14 16:04:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-09-14 16:04:17,915 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:17,915 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:17,916 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1548274009, now seen corresponding path program 1 times [2018-09-14 16:04:17,916 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:17,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:17,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:17,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:17,917 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:18,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:18,496 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:18,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:18,509 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:18,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:18,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:19,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:19,059 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:19,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:19,074 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:19,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:19,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:19,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:19,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-14 16:04:19,833 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:19,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:04:19,834 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:04:19,834 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:04:19,835 INFO L87 Difference]: Start difference. First operand 20812 states and 27997 transitions. Second operand 6 states. [2018-09-14 16:04:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:23,826 INFO L93 Difference]: Finished difference Result 46233 states and 64758 transitions. [2018-09-14 16:04:23,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:04:23,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 321 [2018-09-14 16:04:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:23,928 INFO L225 Difference]: With dead ends: 46233 [2018-09-14 16:04:23,928 INFO L226 Difference]: Without dead ends: 25432 [2018-09-14 16:04:23,981 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1280 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:04:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25432 states. [2018-09-14 16:04:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25432 to 24084. [2018-09-14 16:04:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24084 states. [2018-09-14 16:04:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 30261 transitions. [2018-09-14 16:04:24,601 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 30261 transitions. Word has length 321 [2018-09-14 16:04:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:24,601 INFO L480 AbstractCegarLoop]: Abstraction has 24084 states and 30261 transitions. [2018-09-14 16:04:24,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:04:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 30261 transitions. [2018-09-14 16:04:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-14 16:04:24,649 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:24,649 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:24,650 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1908447066, now seen corresponding path program 1 times [2018-09-14 16:04:24,650 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:24,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:24,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:24,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:24,651 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:25,039 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:04:25,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:04:25,040 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:25,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:04:25,041 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:04:25,041 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:04:25,041 INFO L87 Difference]: Start difference. First operand 24084 states and 30261 transitions. Second operand 3 states. [2018-09-14 16:04:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:26,711 INFO L93 Difference]: Finished difference Result 45279 states and 56878 transitions. [2018-09-14 16:04:26,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:04:26,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2018-09-14 16:04:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:26,769 INFO L225 Difference]: With dead ends: 45279 [2018-09-14 16:04:26,769 INFO L226 Difference]: Without dead ends: 21623 [2018-09-14 16:04:26,808 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:04:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21623 states. [2018-09-14 16:04:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21623 to 21378. [2018-09-14 16:04:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21378 states. [2018-09-14 16:04:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21378 states to 21378 states and 25736 transitions. [2018-09-14 16:04:27,239 INFO L78 Accepts]: Start accepts. Automaton has 21378 states and 25736 transitions. Word has length 340 [2018-09-14 16:04:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:27,240 INFO L480 AbstractCegarLoop]: Abstraction has 21378 states and 25736 transitions. [2018-09-14 16:04:27,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:04:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 21378 states and 25736 transitions. [2018-09-14 16:04:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-09-14 16:04:27,280 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:27,281 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:27,281 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1043224730, now seen corresponding path program 1 times [2018-09-14 16:04:27,282 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:27,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:27,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:27,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:27,283 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 178 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-09-14 16:04:28,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:28,186 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:28,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:28,195 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:28,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-09-14 16:04:28,718 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:28,986 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-09-14 16:04:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 142 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-14 16:04:29,308 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:04:29,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-14 16:04:29,309 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:29,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:04:29,309 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:04:29,310 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:04:29,310 INFO L87 Difference]: Start difference. First operand 21378 states and 25736 transitions. Second operand 5 states. [2018-09-14 16:04:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:31,208 INFO L93 Difference]: Finished difference Result 52323 states and 63116 transitions. [2018-09-14 16:04:31,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:04:31,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2018-09-14 16:04:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:31,306 INFO L225 Difference]: With dead ends: 52323 [2018-09-14 16:04:31,306 INFO L226 Difference]: Without dead ends: 34265 [2018-09-14 16:04:31,342 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 714 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:04:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34265 states. [2018-09-14 16:04:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34265 to 33156. [2018-09-14 16:04:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33156 states. [2018-09-14 16:04:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33156 states to 33156 states and 39378 transitions. [2018-09-14 16:04:31,984 INFO L78 Accepts]: Start accepts. Automaton has 33156 states and 39378 transitions. Word has length 360 [2018-09-14 16:04:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:31,984 INFO L480 AbstractCegarLoop]: Abstraction has 33156 states and 39378 transitions. [2018-09-14 16:04:31,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:04:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33156 states and 39378 transitions. [2018-09-14 16:04:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-14 16:04:32,030 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:32,030 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:32,030 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1126942795, now seen corresponding path program 1 times [2018-09-14 16:04:32,031 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:32,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:32,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:32,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:32,032 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-14 16:04:32,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:32,532 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:32,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:32,540 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:32,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-14 16:04:33,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 175 proven. 60 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-14 16:04:33,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:33,710 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:33,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:33,725 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:34,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 202 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:34,609 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 180 proven. 60 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-14 16:04:35,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:35,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 10, 8] total 26 [2018-09-14 16:04:35,080 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:35,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:04:35,081 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:04:35,081 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2018-09-14 16:04:35,082 INFO L87 Difference]: Start difference. First operand 33156 states and 39378 transitions. Second operand 12 states. [2018-09-14 16:04:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:46,825 INFO L93 Difference]: Finished difference Result 91170 states and 119305 transitions. [2018-09-14 16:04:46,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-14 16:04:46,825 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 387 [2018-09-14 16:04:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:47,101 INFO L225 Difference]: With dead ends: 91170 [2018-09-14 16:04:47,101 INFO L226 Difference]: Without dead ends: 58630 [2018-09-14 16:04:47,198 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1626 GetRequests, 1557 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2018-09-14 16:04:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58630 states. [2018-09-14 16:04:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58630 to 55051. [2018-09-14 16:04:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55051 states. [2018-09-14 16:04:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55051 states to 55051 states and 63670 transitions. [2018-09-14 16:04:48,660 INFO L78 Accepts]: Start accepts. Automaton has 55051 states and 63670 transitions. Word has length 387 [2018-09-14 16:04:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:48,661 INFO L480 AbstractCegarLoop]: Abstraction has 55051 states and 63670 transitions. [2018-09-14 16:04:48,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:04:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 55051 states and 63670 transitions. [2018-09-14 16:04:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-09-14 16:04:48,734 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:48,734 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:48,735 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -497271089, now seen corresponding path program 1 times [2018-09-14 16:04:48,735 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:48,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:48,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:48,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:48,736 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:49,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:49,515 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:49,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:49,523 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:49,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-14 16:04:49,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 185 proven. 102 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-14 16:04:50,233 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:04:50,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-14 16:04:50,233 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:50,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:04:50,234 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:04:50,234 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:04:50,235 INFO L87 Difference]: Start difference. First operand 55051 states and 63670 transitions. Second operand 5 states. [2018-09-14 16:04:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:52,446 INFO L93 Difference]: Finished difference Result 97294 states and 112580 transitions. [2018-09-14 16:04:52,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:04:52,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 403 [2018-09-14 16:04:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:52,584 INFO L225 Difference]: With dead ends: 97294 [2018-09-14 16:04:52,584 INFO L226 Difference]: Without dead ends: 50666 [2018-09-14 16:04:52,654 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 800 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:04:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50666 states. [2018-09-14 16:04:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50666 to 47903. [2018-09-14 16:04:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47903 states. [2018-09-14 16:04:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47903 states to 47903 states and 54463 transitions. [2018-09-14 16:04:53,463 INFO L78 Accepts]: Start accepts. Automaton has 47903 states and 54463 transitions. Word has length 403 [2018-09-14 16:04:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:53,463 INFO L480 AbstractCegarLoop]: Abstraction has 47903 states and 54463 transitions. [2018-09-14 16:04:53,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:04:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 47903 states and 54463 transitions. [2018-09-14 16:04:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-09-14 16:04:53,507 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:53,507 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:53,508 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1296594471, now seen corresponding path program 1 times [2018-09-14 16:04:53,508 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:53,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:53,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:53,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:53,509 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 259 proven. 58 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-09-14 16:04:54,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:54,066 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:54,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:54,083 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:54,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-09-14 16:04:54,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 205 proven. 169 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:04:55,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:55,391 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:55,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:55,408 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:56,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-14 16:04:56,364 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 197 proven. 117 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-14 16:04:56,716 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:04:56,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 6, 5] total 18 [2018-09-14 16:04:56,717 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:56,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:04:56,718 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:04:56,718 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:04:56,719 INFO L87 Difference]: Start difference. First operand 47903 states and 54463 transitions. Second operand 5 states. [2018-09-14 16:04:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:58,557 INFO L93 Difference]: Finished difference Result 88209 states and 100071 transitions. [2018-09-14 16:04:58,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:04:58,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2018-09-14 16:04:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:58,663 INFO L225 Difference]: With dead ends: 88209 [2018-09-14 16:04:58,663 INFO L226 Difference]: Without dead ends: 49091 [2018-09-14 16:04:58,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1665 GetRequests, 1645 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-09-14 16:04:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49091 states. [2018-09-14 16:04:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49091 to 48994. [2018-09-14 16:04:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48994 states. [2018-09-14 16:04:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 55599 transitions. [2018-09-14 16:04:59,506 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 55599 transitions. Word has length 415 [2018-09-14 16:04:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:59,506 INFO L480 AbstractCegarLoop]: Abstraction has 48994 states and 55599 transitions. [2018-09-14 16:04:59,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:04:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 55599 transitions. [2018-09-14 16:04:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-09-14 16:04:59,563 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:59,563 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:59,563 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash 335770293, now seen corresponding path program 1 times [2018-09-14 16:04:59,564 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:59,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:59,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:59,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:59,565 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:00,143 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:05:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 254 proven. 126 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-09-14 16:05:00,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:00,617 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:00,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:00,629 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:00,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-14 16:05:01,122 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-14 16:05:01,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:01,507 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:01,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:01,525 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:02,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-14 16:05:02,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-14 16:05:02,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:02,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-14 16:05:02,940 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:02,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:05:02,941 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:05:02,942 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:05:02,942 INFO L87 Difference]: Start difference. First operand 48994 states and 55599 transitions. Second operand 12 states. [2018-09-14 16:05:09,957 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 16:05:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:18,174 INFO L93 Difference]: Finished difference Result 163647 states and 204261 transitions. [2018-09-14 16:05:18,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-14 16:05:18,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 443 [2018-09-14 16:05:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:18,574 INFO L225 Difference]: With dead ends: 163647 [2018-09-14 16:05:18,574 INFO L226 Difference]: Without dead ends: 113277 [2018-09-14 16:05:18,727 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1929 GetRequests, 1829 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1417, Invalid=8885, Unknown=0, NotChecked=0, Total=10302 [2018-09-14 16:05:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113277 states. [2018-09-14 16:05:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113277 to 105755. [2018-09-14 16:05:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105755 states. [2018-09-14 16:05:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105755 states to 105755 states and 117649 transitions. [2018-09-14 16:05:21,623 INFO L78 Accepts]: Start accepts. Automaton has 105755 states and 117649 transitions. Word has length 443 [2018-09-14 16:05:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:21,623 INFO L480 AbstractCegarLoop]: Abstraction has 105755 states and 117649 transitions. [2018-09-14 16:05:21,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:05:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 105755 states and 117649 transitions. [2018-09-14 16:05:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-09-14 16:05:21,753 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:21,753 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:21,753 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1503667917, now seen corresponding path program 1 times [2018-09-14 16:05:21,754 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:21,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:21,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:21,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:21,755 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:22,435 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 16:05:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 331 proven. 244 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2018-09-14 16:05:22,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:22,803 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:22,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:22,818 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:23,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-09-14 16:05:23,553 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 331 proven. 244 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2018-09-14 16:05:24,913 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:05:24,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:05:24,913 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:24,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:05:24,914 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:05:24,914 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:05:24,915 INFO L87 Difference]: Start difference. First operand 105755 states and 117649 transitions. Second operand 5 states. [2018-09-14 16:05:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:28,460 INFO L93 Difference]: Finished difference Result 218483 states and 243609 transitions. [2018-09-14 16:05:28,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:05:28,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 562 [2018-09-14 16:05:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:28,752 INFO L225 Difference]: With dead ends: 218483 [2018-09-14 16:05:28,752 INFO L226 Difference]: Without dead ends: 120489 [2018-09-14 16:05:28,871 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 1119 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:05:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120489 states. [2018-09-14 16:05:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120489 to 115685. [2018-09-14 16:05:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115685 states. [2018-09-14 16:05:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115685 states to 115685 states and 128491 transitions. [2018-09-14 16:05:30,881 INFO L78 Accepts]: Start accepts. Automaton has 115685 states and 128491 transitions. Word has length 562 [2018-09-14 16:05:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:30,882 INFO L480 AbstractCegarLoop]: Abstraction has 115685 states and 128491 transitions. [2018-09-14 16:05:30,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:05:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 115685 states and 128491 transitions. [2018-09-14 16:05:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-09-14 16:05:30,989 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:30,990 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:30,990 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2117005917, now seen corresponding path program 1 times [2018-09-14 16:05:30,990 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:30,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:30,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:30,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:30,992 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:32,142 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:05:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 368 proven. 506 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-14 16:05:32,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:32,429 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:32,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:32,437 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:32,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 587 proven. 4 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-09-14 16:05:33,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 372 proven. 343 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-09-14 16:05:33,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:33,398 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:33,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:33,414 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:34,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 587 proven. 4 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-09-14 16:05:34,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 372 proven. 343 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-09-14 16:05:35,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:35,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-14 16:05:35,664 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:35,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 16:05:35,665 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 16:05:35,665 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:05:35,666 INFO L87 Difference]: Start difference. First operand 115685 states and 128491 transitions. Second operand 13 states. [2018-09-14 16:05:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:56,191 INFO L93 Difference]: Finished difference Result 550354 states and 659408 transitions. [2018-09-14 16:05:56,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-14 16:05:56,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 572 [2018-09-14 16:05:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:58,152 INFO L225 Difference]: With dead ends: 550354 [2018-09-14 16:05:58,152 INFO L226 Difference]: Without dead ends: 439711 [2018-09-14 16:05:58,453 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2368 GetRequests, 2305 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=599, Invalid=2263, Unknown=0, NotChecked=0, Total=2862 [2018-09-14 16:05:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439711 states. [2018-09-14 16:06:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439711 to 435447. [2018-09-14 16:06:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435447 states. [2018-09-14 16:06:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435447 states to 435447 states and 519921 transitions. [2018-09-14 16:06:18,224 INFO L78 Accepts]: Start accepts. Automaton has 435447 states and 519921 transitions. Word has length 572 [2018-09-14 16:06:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:18,225 INFO L480 AbstractCegarLoop]: Abstraction has 435447 states and 519921 transitions. [2018-09-14 16:06:18,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 16:06:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 435447 states and 519921 transitions. [2018-09-14 16:06:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-09-14 16:06:18,541 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:18,541 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:18,541 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash 687616279, now seen corresponding path program 1 times [2018-09-14 16:06:18,542 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:18,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:18,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:18,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:18,543 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 477 proven. 106 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-09-14 16:06:19,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:19,267 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:19,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:19,277 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:20,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 733 proven. 14 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-14 16:06:20,664 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 739 proven. 8 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-14 16:06:21,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:21,241 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:21,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:21,258 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:22,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 733 proven. 14 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-14 16:06:22,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 739 proven. 8 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-14 16:06:23,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:23,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 16:06:23,224 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:23,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:06:23,225 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:06:23,225 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:06:23,225 INFO L87 Difference]: Start difference. First operand 435447 states and 519921 transitions. Second operand 9 states. [2018-09-14 16:06:25,798 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 Received shutdown request... [2018-09-14 16:07:05,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-14 16:07:05,683 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:07:05,690 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:07:05,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:07:05 BoogieIcfgContainer [2018-09-14 16:07:05,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:07:05,691 INFO L168 Benchmark]: Toolchain (without parser) took 213747.23 ms. Allocated memory was 1.5 GB in the beginning and 5.5 GB in the end (delta: 3.9 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 4.4 GB. Max. memory is 7.1 GB. [2018-09-14 16:07:05,692 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:07:05,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1150.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-09-14 16:07:05,694 INFO L168 Benchmark]: Boogie Procedure Inliner took 161.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:07:05,694 INFO L168 Benchmark]: Boogie Preprocessor took 395.00 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 813.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -951.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:07:05,695 INFO L168 Benchmark]: RCFGBuilder took 5021.44 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 260.4 MB). Peak memory consumption was 260.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:07:05,696 INFO L168 Benchmark]: TraceAbstraction took 207011.29 ms. Allocated memory was 2.4 GB in the beginning and 5.5 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -575.3 MB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. [2018-09-14 16:07:05,701 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1150.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 161.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 395.00 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 813.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -951.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5021.44 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 260.4 MB). Peak memory consumption was 260.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207011.29 ms. Allocated memory was 2.4 GB in the beginning and 5.5 GB in the end (delta: 3.1 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -575.3 MB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1641]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1641). Cancelled while BasicCegarLoop was constructing difference of abstraction (435447states) and FLOYD_HOARE automaton (currently 49 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (1435236 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 206.9s OverallTime, 19 OverallIterations, 7 TraceHistogramMax, 134.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4988 SDtfs, 29138 SDslu, 8460 SDs, 0 SdLazy, 46299 SolverSat, 9818 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16892 GetRequests, 16453 SyntacticMatches, 59 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6537 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435447occurred in iteration=18, 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: 31.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 27269 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 8.7s SatisfiabilityAnalysisTime, 25.1s InterpolantComputationTime, 14884 NumberOfCodeBlocks, 14884 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 23026 ConstructedInterpolants, 0 QuantifiedInterpolants, 25990776 SizeOfPredicates, 112 NumberOfNonLiveVariables, 28810 ConjunctsInSsa, 291 ConjunctsInUnsatCore, 59 InterpolantComputations, 14 PerfectInterpolantSequences, 19386/22864 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-07-05-714.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-07-05-714.csv Completed graceful shutdown