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_label41_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:15:32,824 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:15:32,826 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:15:32,839 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:15:32,839 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:15:32,840 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:15:32,842 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:15:32,843 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:15:32,845 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:15:32,848 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:15:32,849 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:15:32,849 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:15:32,850 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:15:32,851 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:15:32,852 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:15:32,853 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:15:32,854 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:15:32,856 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:15:32,858 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:15:32,860 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:15:32,861 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:15:32,862 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:15:32,865 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 10:15:32,865 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 10:15:32,865 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 10:15:32,866 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 10:15:32,870 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 10:15:32,871 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 10:15:32,872 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 10:15:32,875 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 10:15:32,875 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 10:15:32,876 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 10:15:32,877 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 10:15:32,877 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 10:15:32,883 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 10:15:32,884 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 10:15:32,884 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 [2018-09-18 10:15:32,912 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:15:32,912 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:15:32,913 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:15:32,917 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:15:32,917 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:15:32,917 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:15:32,917 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:15:32,918 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:15:32,918 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:15:32,918 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:15:32,918 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:15:32,919 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:15:32,920 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:15:32,920 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:15:32,920 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:15:32,920 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:15:32,922 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:15:32,922 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:15:32,922 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:15:32,923 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:15:32,923 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:15:32,923 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:15:32,923 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:15:32,924 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:15:32,924 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:15:32,924 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:15:32,924 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:15:32,925 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:15:32,925 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:15:32,925 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:15:32,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:15:32,926 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:15:32,926 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:15:32,926 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:15:32,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:15:33,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:15:33,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:15:33,014 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:15:33,015 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:15:33,015 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label41_true-unreach-call.c [2018-09-18 10:15:33,404 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a997c96/7da0d88f4fcf4d1992ca993882eb3cd3/FLAG94455ffac [2018-09-18 10:15:33,747 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:15:33,748 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label41_true-unreach-call.c [2018-09-18 10:15:33,772 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a997c96/7da0d88f4fcf4d1992ca993882eb3cd3/FLAG94455ffac [2018-09-18 10:15:33,796 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a997c96/7da0d88f4fcf4d1992ca993882eb3cd3 [2018-09-18 10:15:33,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:15:33,812 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:15:33,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:15:33,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:15:33,823 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:15:33,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:15:33" (1/1) ... [2018-09-18 10:15:33,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108b7f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:33, skipping insertion in model container [2018-09-18 10:15:33,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:15:33" (1/1) ... [2018-09-18 10:15:33,843 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:15:34,650 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:15:34,667 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:15:34,890 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:15:34,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34 WrapperNode [2018-09-18 10:15:34,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:15:34,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:15:34,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:15:34,956 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:15:34,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:15:35,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:15:35,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:15:35,130 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:15:35,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (1/1) ... [2018-09-18 10:15:35,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:15:35,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:15:35,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:15:35,479 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:15:35,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (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 [2018-09-18 10:15:35,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:15:35,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:15:35,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:15:35,548 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:15:35,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:15:35,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:15:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:15:35,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:15:40,359 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:15:40,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:15:40 BoogieIcfgContainer [2018-09-18 10:15:40,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:15:40,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:15:40,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:15:40,368 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:15:40,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:15:33" (1/3) ... [2018-09-18 10:15:40,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2617a235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:15:40, skipping insertion in model container [2018-09-18 10:15:40,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:15:34" (2/3) ... [2018-09-18 10:15:40,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2617a235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:15:40, skipping insertion in model container [2018-09-18 10:15:40,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:15:40" (3/3) ... [2018-09-18 10:15:40,374 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label41_true-unreach-call.c [2018-09-18 10:15:40,385 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:15:40,397 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:15:40,470 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:15:40,470 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:15:40,471 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:15:40,471 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:15:40,471 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:15:40,471 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:15:40,471 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:15:40,472 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:15:40,472 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:15:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:15:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-18 10:15:40,552 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:40,554 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] [2018-09-18 10:15:40,555 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1737651188, now seen corresponding path program 1 times [2018-09-18 10:15:40,565 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:40,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:40,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:40,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:40,626 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:41,689 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:15:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:15:41,975 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:15:41,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 10:15:41,976 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:41,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 10:15:41,993 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 10:15:41,994 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:15:41,996 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-18 10:15:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:45,458 INFO L93 Difference]: Finished difference Result 1074 states and 1924 transitions. [2018-09-18 10:15:45,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 10:15:45,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 189 [2018-09-18 10:15:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:45,555 INFO L225 Difference]: With dead ends: 1074 [2018-09-18 10:15:45,556 INFO L226 Difference]: Without dead ends: 756 [2018-09-18 10:15:45,565 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:15:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2018-09-18 10:15:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 520. [2018-09-18 10:15:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-18 10:15:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 919 transitions. [2018-09-18 10:15:45,686 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 919 transitions. Word has length 189 [2018-09-18 10:15:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:45,687 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 919 transitions. [2018-09-18 10:15:45,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 10:15:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 919 transitions. [2018-09-18 10:15:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-18 10:15:45,695 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:45,696 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] [2018-09-18 10:15:45,696 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1467958639, now seen corresponding path program 1 times [2018-09-18 10:15:45,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:45,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:45,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:45,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:45,698 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:46,054 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:15:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:15:46,163 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:15:46,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:15:46,164 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:46,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:15:46,166 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:15:46,166 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:15:46,166 INFO L87 Difference]: Start difference. First operand 520 states and 919 transitions. Second operand 6 states. [2018-09-18 10:15:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:49,803 INFO L93 Difference]: Finished difference Result 1482 states and 2700 transitions. [2018-09-18 10:15:49,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:15:49,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 217 [2018-09-18 10:15:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:49,819 INFO L225 Difference]: With dead ends: 1482 [2018-09-18 10:15:49,819 INFO L226 Difference]: Without dead ends: 968 [2018-09-18 10:15:49,823 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 [2018-09-18 10:15:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2018-09-18 10:15:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 949. [2018-09-18 10:15:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2018-09-18 10:15:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1579 transitions. [2018-09-18 10:15:49,879 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1579 transitions. Word has length 217 [2018-09-18 10:15:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:49,879 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1579 transitions. [2018-09-18 10:15:49,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:15:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1579 transitions. [2018-09-18 10:15:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-09-18 10:15:49,885 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:49,885 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] [2018-09-18 10:15:49,886 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1187874820, now seen corresponding path program 1 times [2018-09-18 10:15:49,886 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:49,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:49,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:49,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:49,888 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:15:50,330 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:15:50,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:15:50,330 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:50,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:15:50,333 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:15:50,334 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:15:50,334 INFO L87 Difference]: Start difference. First operand 949 states and 1579 transitions. Second operand 3 states. [2018-09-18 10:15:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:53,022 INFO L93 Difference]: Finished difference Result 2535 states and 4260 transitions. [2018-09-18 10:15:53,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:15:53,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2018-09-18 10:15:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:53,041 INFO L225 Difference]: With dead ends: 2535 [2018-09-18 10:15:53,041 INFO L226 Difference]: Without dead ends: 1592 [2018-09-18 10:15:53,046 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:15:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2018-09-18 10:15:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1590. [2018-09-18 10:15:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2018-09-18 10:15:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2503 transitions. [2018-09-18 10:15:53,129 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2503 transitions. Word has length 235 [2018-09-18 10:15:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:53,130 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 2503 transitions. [2018-09-18 10:15:53,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:15:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2503 transitions. [2018-09-18 10:15:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-18 10:15:53,142 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:53,142 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:53,143 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1850495347, now seen corresponding path program 1 times [2018-09-18 10:15:53,143 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:53,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:53,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:53,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:53,145 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:53,429 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:15:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:15:53,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:53,532 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 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 [2018-09-18 10:15:53,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:53,543 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:53,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-18 10:15:54,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:15:54,437 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:15:54,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:15:54,438 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:54,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:15:54,439 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:15:54,439 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:15:54,439 INFO L87 Difference]: Start difference. First operand 1590 states and 2503 transitions. Second operand 5 states. [2018-09-18 10:15:55,143 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-18 10:15:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:15:57,576 INFO L93 Difference]: Finished difference Result 4071 states and 6536 transitions. [2018-09-18 10:15:57,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:15:57,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2018-09-18 10:15:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:15:57,593 INFO L225 Difference]: With dead ends: 4071 [2018-09-18 10:15:57,593 INFO L226 Difference]: Without dead ends: 2487 [2018-09-18 10:15:57,603 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 496 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:15:57,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2018-09-18 10:15:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2428. [2018-09-18 10:15:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2018-09-18 10:15:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3453 transitions. [2018-09-18 10:15:57,683 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3453 transitions. Word has length 251 [2018-09-18 10:15:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:15:57,684 INFO L480 AbstractCegarLoop]: Abstraction has 2428 states and 3453 transitions. [2018-09-18 10:15:57,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:15:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3453 transitions. [2018-09-18 10:15:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-18 10:15:57,693 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:15:57,694 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:15:57,694 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:15:57,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2115580027, now seen corresponding path program 1 times [2018-09-18 10:15:57,695 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:15:57,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:57,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:57,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:15:57,696 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:15:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:15:58,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:15:58,097 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 [2018-09-18 10:15:58,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:15:58,105 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:15:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:15:58,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:15:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-18 10:15:58,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:15:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-18 10:15:58,694 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:15:58,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:15:58,695 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:15:58,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:15:58,696 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:15:58,696 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:15:58,696 INFO L87 Difference]: Start difference. First operand 2428 states and 3453 transitions. Second operand 3 states. [2018-09-18 10:16:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:00,916 INFO L93 Difference]: Finished difference Result 7183 states and 10452 transitions. [2018-09-18 10:16:00,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:16:00,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 253 [2018-09-18 10:16:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:00,945 INFO L225 Difference]: With dead ends: 7183 [2018-09-18 10:16:00,945 INFO L226 Difference]: Without dead ends: 4761 [2018-09-18 10:16:00,959 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 504 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:16:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2018-09-18 10:16:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 4717. [2018-09-18 10:16:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4717 states. [2018-09-18 10:16:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 6688 transitions. [2018-09-18 10:16:01,209 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 6688 transitions. Word has length 253 [2018-09-18 10:16:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:01,210 INFO L480 AbstractCegarLoop]: Abstraction has 4717 states and 6688 transitions. [2018-09-18 10:16:01,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:16:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 6688 transitions. [2018-09-18 10:16:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-18 10:16:01,237 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:01,237 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:01,238 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1557357935, now seen corresponding path program 1 times [2018-09-18 10:16:01,239 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:01,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:01,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:01,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:01,240 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 80 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-18 10:16:01,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:01,616 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 [2018-09-18 10:16:01,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:01,625 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:01,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:02,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:02,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:02,712 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 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:16:02,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:02,743 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:03,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:03,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:04,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:16:04,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-18 10:16:04,209 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:16:04,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:16:04,210 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:16:04,210 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-18 10:16:04,211 INFO L87 Difference]: Start difference. First operand 4717 states and 6688 transitions. Second operand 9 states. [2018-09-18 10:16:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:06,730 INFO L93 Difference]: Finished difference Result 9704 states and 13898 transitions. [2018-09-18 10:16:06,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-18 10:16:06,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 264 [2018-09-18 10:16:06,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:06,759 INFO L225 Difference]: With dead ends: 9704 [2018-09-18 10:16:06,760 INFO L226 Difference]: Without dead ends: 4993 [2018-09-18 10:16:06,779 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 1050 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2018-09-18 10:16:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2018-09-18 10:16:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4807. [2018-09-18 10:16:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4807 states. [2018-09-18 10:16:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4807 states to 4807 states and 6200 transitions. [2018-09-18 10:16:06,995 INFO L78 Accepts]: Start accepts. Automaton has 4807 states and 6200 transitions. Word has length 264 [2018-09-18 10:16:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:06,996 INFO L480 AbstractCegarLoop]: Abstraction has 4807 states and 6200 transitions. [2018-09-18 10:16:06,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:16:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4807 states and 6200 transitions. [2018-09-18 10:16:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-09-18 10:16:07,018 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:07,018 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:07,019 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1934379187, now seen corresponding path program 1 times [2018-09-18 10:16:07,019 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:07,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:07,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:07,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:07,020 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:07,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:07,502 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:16:07,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:07,511 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:07,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:08,472 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-09-18 10:16:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-18 10:16:08,556 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:16:08,822 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:16:08,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-09-18 10:16:08,822 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:08,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:16:08,823 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:16:08,823 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:16:08,824 INFO L87 Difference]: Start difference. First operand 4807 states and 6200 transitions. Second operand 6 states. [2018-09-18 10:16:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:11,073 INFO L93 Difference]: Finished difference Result 10620 states and 14154 transitions. [2018-09-18 10:16:11,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:16:11,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 304 [2018-09-18 10:16:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:11,107 INFO L225 Difference]: With dead ends: 10620 [2018-09-18 10:16:11,107 INFO L226 Difference]: Without dead ends: 5375 [2018-09-18 10:16:11,127 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 600 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-09-18 10:16:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5375 states. [2018-09-18 10:16:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5375 to 5169. [2018-09-18 10:16:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5169 states. [2018-09-18 10:16:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5169 states to 5169 states and 6616 transitions. [2018-09-18 10:16:11,290 INFO L78 Accepts]: Start accepts. Automaton has 5169 states and 6616 transitions. Word has length 304 [2018-09-18 10:16:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:11,291 INFO L480 AbstractCegarLoop]: Abstraction has 5169 states and 6616 transitions. [2018-09-18 10:16:11,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:16:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5169 states and 6616 transitions. [2018-09-18 10:16:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-18 10:16:11,309 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:11,310 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:11,310 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:11,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1587871350, now seen corresponding path program 1 times [2018-09-18 10:16:11,311 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:11,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:11,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:11,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:11,312 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:11,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:11,921 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 [2018-09-18 10:16:11,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:11,930 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:12,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:12,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:12,519 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:16:12,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:16:12,520 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:12,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:16:12,520 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:16:12,521 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:16:12,521 INFO L87 Difference]: Start difference. First operand 5169 states and 6616 transitions. Second operand 3 states. [2018-09-18 10:16:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:14,175 INFO L93 Difference]: Finished difference Result 14581 states and 18997 transitions. [2018-09-18 10:16:14,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:16:14,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 315 [2018-09-18 10:16:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:14,230 INFO L225 Difference]: With dead ends: 14581 [2018-09-18 10:16:14,230 INFO L226 Difference]: Without dead ends: 9418 [2018-09-18 10:16:14,253 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 628 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:16:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9418 states. [2018-09-18 10:16:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9418 to 9334. [2018-09-18 10:16:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9334 states. [2018-09-18 10:16:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9334 states to 9334 states and 11830 transitions. [2018-09-18 10:16:14,482 INFO L78 Accepts]: Start accepts. Automaton has 9334 states and 11830 transitions. Word has length 315 [2018-09-18 10:16:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:14,483 INFO L480 AbstractCegarLoop]: Abstraction has 9334 states and 11830 transitions. [2018-09-18 10:16:14,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:16:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9334 states and 11830 transitions. [2018-09-18 10:16:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-09-18 10:16:14,517 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:14,517 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:16:14,517 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash -838907546, now seen corresponding path program 1 times [2018-09-18 10:16:14,518 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:14,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:14,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:14,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:14,519 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 141 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 10:16:14,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:14,995 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:16:15,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:15,003 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:15,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-18 10:16:15,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 141 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 10:16:15,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:15,463 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 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:16:15,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:15,478 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:15,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-18 10:16:16,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 141 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 10:16:16,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:16:16,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-18 10:16:16,301 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:16:16,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:16:16,302 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:16:16,302 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:16:16,302 INFO L87 Difference]: Start difference. First operand 9334 states and 11830 transitions. Second operand 9 states. [2018-09-18 10:16:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:26,700 INFO L93 Difference]: Finished difference Result 38377 states and 61815 transitions. [2018-09-18 10:16:26,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-18 10:16:26,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 321 [2018-09-18 10:16:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:26,938 INFO L225 Difference]: With dead ends: 38377 [2018-09-18 10:16:26,938 INFO L226 Difference]: Without dead ends: 29049 [2018-09-18 10:16:27,010 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1364 GetRequests, 1311 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2018-09-18 10:16:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29049 states. [2018-09-18 10:16:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29049 to 26299. [2018-09-18 10:16:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26299 states. [2018-09-18 10:16:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 33959 transitions. [2018-09-18 10:16:28,204 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 33959 transitions. Word has length 321 [2018-09-18 10:16:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:28,205 INFO L480 AbstractCegarLoop]: Abstraction has 26299 states and 33959 transitions. [2018-09-18 10:16:28,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:16:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 33959 transitions. [2018-09-18 10:16:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-18 10:16:28,300 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:28,300 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, 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] [2018-09-18 10:16:28,301 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash -741077395, now seen corresponding path program 1 times [2018-09-18 10:16:28,301 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:28,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:28,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:28,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:28,302 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:28,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:28,918 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 [2018-09-18 10:16:28,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:28,933 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:29,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:29,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:29,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:29,370 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 [2018-09-18 10:16:29,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:29,389 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:29,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-18 10:16:30,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-18 10:16:30,686 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-18 10:16:30,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 13 [2018-09-18 10:16:30,687 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:30,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:16:30,688 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:16:30,688 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:16:30,689 INFO L87 Difference]: Start difference. First operand 26299 states and 33959 transitions. Second operand 5 states. [2018-09-18 10:16:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:33,250 INFO L93 Difference]: Finished difference Result 73357 states and 94919 transitions. [2018-09-18 10:16:33,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:16:33,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2018-09-18 10:16:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:33,411 INFO L225 Difference]: With dead ends: 73357 [2018-09-18 10:16:33,411 INFO L226 Difference]: Without dead ends: 46671 [2018-09-18 10:16:33,478 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1313 GetRequests, 1298 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:16:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46671 states. [2018-09-18 10:16:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46671 to 45879. [2018-09-18 10:16:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45879 states. [2018-09-18 10:16:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45879 states to 45879 states and 57987 transitions. [2018-09-18 10:16:34,680 INFO L78 Accepts]: Start accepts. Automaton has 45879 states and 57987 transitions. Word has length 327 [2018-09-18 10:16:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:34,681 INFO L480 AbstractCegarLoop]: Abstraction has 45879 states and 57987 transitions. [2018-09-18 10:16:34,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:16:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 45879 states and 57987 transitions. [2018-09-18 10:16:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-09-18 10:16:34,808 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:34,809 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:16:34,809 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 864215609, now seen corresponding path program 1 times [2018-09-18 10:16:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:34,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:34,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:34,811 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:35,474 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:16:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:35,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:35,799 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 [2018-09-18 10:16:35,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:35,810 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:36,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:16:36,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:16:36,681 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:16:36,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-09-18 10:16:36,681 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:36,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:16:36,682 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:16:36,682 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:16:36,683 INFO L87 Difference]: Start difference. First operand 45879 states and 57987 transitions. Second operand 5 states. [2018-09-18 10:16:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:38,406 INFO L93 Difference]: Finished difference Result 127499 states and 167080 transitions. [2018-09-18 10:16:38,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:16:38,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 352 [2018-09-18 10:16:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:38,772 INFO L225 Difference]: With dead ends: 127499 [2018-09-18 10:16:38,772 INFO L226 Difference]: Without dead ends: 81626 [2018-09-18 10:16:38,897 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:16:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81626 states. [2018-09-18 10:16:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81626 to 80439. [2018-09-18 10:16:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80439 states. [2018-09-18 10:16:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80439 states to 80439 states and 101769 transitions. [2018-09-18 10:16:41,818 INFO L78 Accepts]: Start accepts. Automaton has 80439 states and 101769 transitions. Word has length 352 [2018-09-18 10:16:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:41,818 INFO L480 AbstractCegarLoop]: Abstraction has 80439 states and 101769 transitions. [2018-09-18 10:16:41,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:16:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 80439 states and 101769 transitions. [2018-09-18 10:16:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-09-18 10:16:42,084 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:42,084 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:42,085 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1472588676, now seen corresponding path program 1 times [2018-09-18 10:16:42,085 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:42,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:42,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:42,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:42,087 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 291 proven. 20 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-18 10:16:42,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:42,618 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 [2018-09-18 10:16:42,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:42,634 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:42,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2018-09-18 10:16:43,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 287 proven. 6 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-09-18 10:16:43,488 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:16:43,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2018-09-18 10:16:43,489 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:43,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:16:43,489 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:16:43,489 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:16:43,490 INFO L87 Difference]: Start difference. First operand 80439 states and 101769 transitions. Second operand 3 states. [2018-09-18 10:16:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:44,969 INFO L93 Difference]: Finished difference Result 160869 states and 203545 transitions. [2018-09-18 10:16:44,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:16:44,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2018-09-18 10:16:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:45,259 INFO L225 Difference]: With dead ends: 160869 [2018-09-18 10:16:45,260 INFO L226 Difference]: Without dead ends: 80436 [2018-09-18 10:16:45,409 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 953 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:16:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80436 states. [2018-09-18 10:16:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80436 to 80435. [2018-09-18 10:16:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80435 states. [2018-09-18 10:16:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80435 states to 80435 states and 101721 transitions. [2018-09-18 10:16:47,860 INFO L78 Accepts]: Start accepts. Automaton has 80435 states and 101721 transitions. Word has length 477 [2018-09-18 10:16:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:47,861 INFO L480 AbstractCegarLoop]: Abstraction has 80435 states and 101721 transitions. [2018-09-18 10:16:47,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:16:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 80435 states and 101721 transitions. [2018-09-18 10:16:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-09-18 10:16:48,102 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:48,103 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:16:48,103 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1533573791, now seen corresponding path program 1 times [2018-09-18 10:16:48,104 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:48,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:48,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:48,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:48,105 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:48,800 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:16:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 304 proven. 121 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-09-18 10:16:49,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:49,013 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:16:49,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:49,021 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:49,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-18 10:16:50,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-18 10:16:50,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:50,325 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:16:50,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:50,341 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:51,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-18 10:16:52,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 425 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-18 10:16:52,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:16:52,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-18 10:16:52,370 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:16:52,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:16:52,371 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:16:52,372 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:16:52,372 INFO L87 Difference]: Start difference. First operand 80435 states and 101721 transitions. Second operand 9 states. [2018-09-18 10:17:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:03,159 INFO L93 Difference]: Finished difference Result 250854 states and 355855 transitions. [2018-09-18 10:17:03,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-18 10:17:03,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 477 [2018-09-18 10:17:03,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:04,186 INFO L225 Difference]: With dead ends: 250854 [2018-09-18 10:17:04,186 INFO L226 Difference]: Without dead ends: 170425 [2018-09-18 10:17:04,425 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1973 GetRequests, 1925 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2018-09-18 10:17:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170425 states. [2018-09-18 10:17:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170425 to 160047. [2018-09-18 10:17:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160047 states. [2018-09-18 10:17:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160047 states to 160047 states and 196346 transitions. [2018-09-18 10:17:09,052 INFO L78 Accepts]: Start accepts. Automaton has 160047 states and 196346 transitions. Word has length 477 [2018-09-18 10:17:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:09,052 INFO L480 AbstractCegarLoop]: Abstraction has 160047 states and 196346 transitions. [2018-09-18 10:17:09,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:17:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 160047 states and 196346 transitions. [2018-09-18 10:17:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-09-18 10:17:09,363 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:09,364 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:17:09,364 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2059787674, now seen corresponding path program 1 times [2018-09-18 10:17:09,365 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:09,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:09,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:09,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:09,366 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-18 10:17:09,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:09,861 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:17:09,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:09,871 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:10,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-09-18 10:17:10,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:11,044 WARN L178 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-09-18 10:17:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-18 10:17:11,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:11,213 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:17:11,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:11,233 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:12,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-09-18 10:17:12,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-18 10:17:12,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:17:12,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-18 10:17:12,520 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:17:12,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:17:12,521 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:17:12,521 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:17:12,522 INFO L87 Difference]: Start difference. First operand 160047 states and 196346 transitions. Second operand 7 states. [2018-09-18 10:17:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:19,374 INFO L93 Difference]: Finished difference Result 302636 states and 388968 transitions. [2018-09-18 10:17:19,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:17:19,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 486 [2018-09-18 10:17:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:19,902 INFO L225 Difference]: With dead ends: 302636 [2018-09-18 10:17:19,903 INFO L226 Difference]: Without dead ends: 143651 [2018-09-18 10:17:20,148 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1952 GetRequests, 1940 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:17:20,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143651 states. [2018-09-18 10:17:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143651 to 137208. [2018-09-18 10:17:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137208 states. [2018-09-18 10:17:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137208 states to 137208 states and 163533 transitions. [2018-09-18 10:17:28,513 INFO L78 Accepts]: Start accepts. Automaton has 137208 states and 163533 transitions. Word has length 486 [2018-09-18 10:17:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:28,514 INFO L480 AbstractCegarLoop]: Abstraction has 137208 states and 163533 transitions. [2018-09-18 10:17:28,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:17:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 137208 states and 163533 transitions. [2018-09-18 10:17:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2018-09-18 10:17:28,698 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:28,698 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:17:28,698 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash -592567081, now seen corresponding path program 1 times [2018-09-18 10:17:28,699 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:28,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:28,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:28,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:28,700 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 325 proven. 33 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-18 10:17:29,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:29,135 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 [2018-09-18 10:17:29,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:29,148 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:29,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 357 proven. 4 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-18 10:17:30,118 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 338 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-18 10:17:30,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:30,416 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 [2018-09-18 10:17:30,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:30,433 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:31,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 357 proven. 4 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-18 10:17:31,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 338 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-18 10:17:31,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:17:31,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-18 10:17:31,737 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:17:31,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:17:31,738 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:17:31,739 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:17:31,739 INFO L87 Difference]: Start difference. First operand 137208 states and 163533 transitions. Second operand 9 states. [2018-09-18 10:18:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:06,533 INFO L93 Difference]: Finished difference Result 1116050 states and 1531857 transitions. [2018-09-18 10:18:06,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-18 10:18:06,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 498 [2018-09-18 10:18:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:11,918 INFO L225 Difference]: With dead ends: 1116050 [2018-09-18 10:18:11,918 INFO L226 Difference]: Without dead ends: 980139 [2018-09-18 10:18:12,478 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2052 GetRequests, 2006 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2018-09-18 10:18:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980139 states. [2018-09-18 10:18:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980139 to 937842. [2018-09-18 10:18:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937842 states. [2018-09-18 10:19:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937842 states to 937842 states and 1156172 transitions. [2018-09-18 10:19:02,335 INFO L78 Accepts]: Start accepts. Automaton has 937842 states and 1156172 transitions. Word has length 498 [2018-09-18 10:19:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:19:02,335 INFO L480 AbstractCegarLoop]: Abstraction has 937842 states and 1156172 transitions. [2018-09-18 10:19:02,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:19:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 937842 states and 1156172 transitions. Received shutdown request... [2018-09-18 10:19:05,354 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:19:05,360 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:19:05,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:19:05 BoogieIcfgContainer [2018-09-18 10:19:05,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:19:05,362 INFO L168 Benchmark]: Toolchain (without parser) took 211553.06 ms. Allocated memory was 1.5 GB in the beginning and 6.9 GB in the end (delta: 5.4 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 5.5 GB. Max. memory is 7.1 GB. [2018-09-18 10:19:05,363 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 10:19:05,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1141.90 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-18 10:19:05,364 INFO L168 Benchmark]: Boogie Procedure Inliner took 174.10 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. [2018-09-18 10:19:05,365 INFO L168 Benchmark]: Boogie Preprocessor took 348.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -929.5 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-18 10:19:05,368 INFO L168 Benchmark]: RCFGBuilder took 4881.34 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 258.6 MB). Peak memory consumption was 258.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:19:05,369 INFO L168 Benchmark]: TraceAbstraction took 204999.69 ms. Allocated memory was 2.3 GB in the beginning and 6.9 GB in the end (delta: 4.6 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). Peak memory consumption was 5.2 GB. Max. memory is 7.1 GB. [2018-09-18 10:19:05,376 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1141.90 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 174.10 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 348.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -929.5 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4881.34 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 258.6 MB). Peak memory consumption was 258.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204999.69 ms. Allocated memory was 2.3 GB in the beginning and 6.9 GB in the end (delta: 4.6 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). Peak memory consumption was 5.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1581]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1581). Cancelled while IsEmpty was searching accepting run (input had 937842 states). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 204.9s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 100.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5322 SDtfs, 19153 SDslu, 9512 SDs, 0 SdLazy, 29509 SolverSat, 6209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13693 GetRequests, 13418 SyntacticMatches, 30 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=937842occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 71.7s AutomataMinimizationTime, 15 MinimizatonAttempts, 64684 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 18.3s InterpolantComputationTime, 11664 NumberOfCodeBlocks, 11664 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 18311 ConstructedInterpolants, 0 QuantifiedInterpolants, 13673862 SizeOfPredicates, 32 NumberOfNonLiveVariables, 24837 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 51 InterpolantComputations, 13 PerfectInterpolantSequences, 12871/13462 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_label41_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-19-05-395.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label41_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-19-05-395.csv Completed graceful shutdown