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_label15_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:00:55,224 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:00:55,227 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:00:55,244 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:00:55,245 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:00:55,246 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:00:55,248 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:00:55,250 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:00:55,253 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:00:55,260 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:00:55,261 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:00:55,264 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:00:55,265 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:00:55,266 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:00:55,269 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:00:55,270 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:00:55,270 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:00:55,272 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:00:55,278 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:00:55,280 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:00:55,281 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:00:55,284 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:00:55,289 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:00:55,289 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:00:55,290 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:00:55,291 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:00:55,293 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:00:55,293 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:00:55,294 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:00:55,295 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:00:55,295 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:00:55,296 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:00:55,296 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:00:55,296 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:00:55,297 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:00:55,298 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:00:55,299 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:00:55,318 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:00:55,318 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:00:55,321 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:00:55,321 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:00:55,321 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:00:55,321 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:00:55,322 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:00:55,322 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:00:55,322 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:00:55,322 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:00:55,322 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:00:55,323 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:00:55,323 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:00:55,324 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:00:55,324 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:00:55,324 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:00:55,324 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:00:55,324 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:00:55,324 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:00:55,325 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:00:55,325 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:00:55,325 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:00:55,325 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:00:55,326 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:55,327 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:00:55,327 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:00:55,327 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:00:55,327 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:00:55,328 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:00:55,328 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:00:55,328 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:00:55,328 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:00:55,328 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:00:55,377 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:00:55,392 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:00:55,398 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:00:55,399 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:00:55,400 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:00:55,401 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label15_true-unreach-call.c [2018-09-14 16:00:55,732 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a47d8afe9/1812f12a72da44a494c30390b9eb8d57/FLAGf31baf9d5 [2018-09-14 16:00:56,110 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:00:56,111 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label15_true-unreach-call.c [2018-09-14 16:00:56,130 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a47d8afe9/1812f12a72da44a494c30390b9eb8d57/FLAGf31baf9d5 [2018-09-14 16:00:56,144 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a47d8afe9/1812f12a72da44a494c30390b9eb8d57 [2018-09-14 16:00:56,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:00:56,157 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:00:56,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:56,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:00:56,167 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:00:56,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:56" (1/1) ... [2018-09-14 16:00:56,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4437afef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:56, skipping insertion in model container [2018-09-14 16:00:56,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:56" (1/1) ... [2018-09-14 16:00:56,183 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:00:56,942 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:56,964 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:00:57,408 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:57,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57 WrapperNode [2018-09-14 16:00:57,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:57,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:57,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:00:57,485 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:00:57,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:57,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:57,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:57,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:00:57,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:00:57,650 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:00:57,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:57,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:57,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:57,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:58,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:58,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:58,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... [2018-09-14 16:00:58,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:00:58,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:00:58,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:00:58,057 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:00:58,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:00:58,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:00:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:00:58,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:00:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:00:58,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:00:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:00:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:01:02,697 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:01:02,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:01:02 BoogieIcfgContainer [2018-09-14 16:01:02,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:01:02,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:01:02,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:01:02,703 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:01:02,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:00:56" (1/3) ... [2018-09-14 16:01:02,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184f3f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:01:02, skipping insertion in model container [2018-09-14 16:01:02,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:57" (2/3) ... [2018-09-14 16:01:02,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184f3f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:01:02, skipping insertion in model container [2018-09-14 16:01:02,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:01:02" (3/3) ... [2018-09-14 16:01:02,707 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label15_true-unreach-call.c [2018-09-14 16:01:02,718 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:01:02,727 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:01:02,785 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:01:02,786 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:01:02,786 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:01:02,786 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:01:02,786 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:01:02,786 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:01:02,787 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:01:02,787 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:01:02,787 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:01:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:01:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-14 16:01:02,839 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:02,840 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:02,841 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:02,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1930807004, now seen corresponding path program 1 times [2018-09-14 16:01:02,850 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:02,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:02,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:02,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:02,900 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:03,792 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:01:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:04,020 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:01:04,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:01:04,021 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:04,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:01:04,045 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:01:04,046 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:01:04,049 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:01:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:06,031 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-09-14 16:01:06,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:01:06,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2018-09-14 16:01:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:06,059 INFO L225 Difference]: With dead ends: 838 [2018-09-14 16:01:06,059 INFO L226 Difference]: Without dead ends: 524 [2018-09-14 16:01:06,067 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:01:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-09-14 16:01:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-09-14 16:01:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-09-14 16:01:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-09-14 16:01:06,158 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 207 [2018-09-14 16:01:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:06,159 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-09-14 16:01:06,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:01:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-09-14 16:01:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-14 16:01:06,169 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:06,170 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:06,170 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1700452501, now seen corresponding path program 1 times [2018-09-14 16:01:06,171 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:06,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:06,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:06,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:06,173 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:06,758 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:01:06,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:01:06,758 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:06,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:01:06,761 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:01:06,761 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:01:06,762 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-09-14 16:01:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:10,594 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-09-14 16:01:10,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:01:10,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 217 [2018-09-14 16:01:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:10,608 INFO L225 Difference]: With dead ends: 1581 [2018-09-14 16:01:10,609 INFO L226 Difference]: Without dead ends: 1065 [2018-09-14 16:01:10,614 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:01:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-09-14 16:01:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-09-14 16:01:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-09-14 16:01:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-09-14 16:01:10,675 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 217 [2018-09-14 16:01:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:10,676 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-09-14 16:01:10,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:01:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-09-14 16:01:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-14 16:01:10,682 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:10,682 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:10,682 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash -673913640, now seen corresponding path program 1 times [2018-09-14 16:01:10,683 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:10,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:10,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:10,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:10,684 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:11,023 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:01:11,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:01:11,024 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:11,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:01:11,025 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:01:11,025 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:01:11,025 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-09-14 16:01:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:13,596 INFO L93 Difference]: Finished difference Result 2887 states and 5065 transitions. [2018-09-14 16:01:13,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:01:13,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2018-09-14 16:01:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:13,610 INFO L225 Difference]: With dead ends: 2887 [2018-09-14 16:01:13,611 INFO L226 Difference]: Without dead ends: 1870 [2018-09-14 16:01:13,616 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:01:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2018-09-14 16:01:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1869. [2018-09-14 16:01:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1869 states. [2018-09-14 16:01:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2999 transitions. [2018-09-14 16:01:13,674 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2999 transitions. Word has length 220 [2018-09-14 16:01:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:13,675 INFO L480 AbstractCegarLoop]: Abstraction has 1869 states and 2999 transitions. [2018-09-14 16:01:13,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:01:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2999 transitions. [2018-09-14 16:01:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-14 16:01:13,683 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:13,684 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:13,684 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash -768110724, now seen corresponding path program 1 times [2018-09-14 16:01:13,685 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:13,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:13,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:13,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:13,686 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:13,999 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:01:13,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:01:14,000 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:14,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:01:14,000 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:01:14,001 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:01:14,001 INFO L87 Difference]: Start difference. First operand 1869 states and 2999 transitions. Second operand 4 states. [2018-09-14 16:01:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:16,347 INFO L93 Difference]: Finished difference Result 7160 states and 12067 transitions. [2018-09-14 16:01:16,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:01:16,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 222 [2018-09-14 16:01:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:16,389 INFO L225 Difference]: With dead ends: 7160 [2018-09-14 16:01:16,389 INFO L226 Difference]: Without dead ends: 5297 [2018-09-14 16:01:16,401 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:01:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2018-09-14 16:01:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 5291. [2018-09-14 16:01:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5291 states. [2018-09-14 16:01:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5291 states to 5291 states and 8112 transitions. [2018-09-14 16:01:16,569 INFO L78 Accepts]: Start accepts. Automaton has 5291 states and 8112 transitions. Word has length 222 [2018-09-14 16:01:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:16,570 INFO L480 AbstractCegarLoop]: Abstraction has 5291 states and 8112 transitions. [2018-09-14 16:01:16,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:01:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5291 states and 8112 transitions. [2018-09-14 16:01:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-14 16:01:16,593 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:16,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:16,593 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1656628327, now seen corresponding path program 1 times [2018-09-14 16:01:16,594 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:16,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:16,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:16,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:16,595 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:17,000 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:01:17,343 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 16:01:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:17,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:17,816 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:17,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:17,839 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:18,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:01:18,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:01:19,246 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:01:19,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2018-09-14 16:01:19,247 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:19,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:01:19,248 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:01:19,248 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:01:19,249 INFO L87 Difference]: Start difference. First operand 5291 states and 8112 transitions. Second operand 4 states. [2018-09-14 16:01:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:22,875 INFO L93 Difference]: Finished difference Result 15729 states and 24668 transitions. [2018-09-14 16:01:22,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:01:22,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2018-09-14 16:01:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:22,931 INFO L225 Difference]: With dead ends: 15729 [2018-09-14 16:01:22,932 INFO L226 Difference]: Without dead ends: 10444 [2018-09-14 16:01:22,958 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 475 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:01:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10444 states. [2018-09-14 16:01:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10444 to 10434. [2018-09-14 16:01:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10434 states. [2018-09-14 16:01:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10434 states to 10434 states and 15622 transitions. [2018-09-14 16:01:23,241 INFO L78 Accepts]: Start accepts. Automaton has 10434 states and 15622 transitions. Word has length 240 [2018-09-14 16:01:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:23,242 INFO L480 AbstractCegarLoop]: Abstraction has 10434 states and 15622 transitions. [2018-09-14 16:01:23,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:01:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 10434 states and 15622 transitions. [2018-09-14 16:01:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-14 16:01:23,287 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:23,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:23,287 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -513793361, now seen corresponding path program 1 times [2018-09-14 16:01:23,288 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:23,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:23,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:23,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:23,289 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:23,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:23,808 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:23,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:23,916 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:24,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:01:24,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:01:24,476 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:01:24,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:01:24,477 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:24,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:01:24,477 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:01:24,478 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:01:24,478 INFO L87 Difference]: Start difference. First operand 10434 states and 15622 transitions. Second operand 5 states. [2018-09-14 16:01:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:27,478 INFO L93 Difference]: Finished difference Result 33171 states and 52513 transitions. [2018-09-14 16:01:27,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:01:27,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2018-09-14 16:01:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:27,600 INFO L225 Difference]: With dead ends: 33171 [2018-09-14 16:01:27,600 INFO L226 Difference]: Without dead ends: 22743 [2018-09-14 16:01:27,660 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:01:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22743 states. [2018-09-14 16:01:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22743 to 22430. [2018-09-14 16:01:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22430 states. [2018-09-14 16:01:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22430 states to 22430 states and 33170 transitions. [2018-09-14 16:01:28,289 INFO L78 Accepts]: Start accepts. Automaton has 22430 states and 33170 transitions. Word has length 255 [2018-09-14 16:01:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:28,289 INFO L480 AbstractCegarLoop]: Abstraction has 22430 states and 33170 transitions. [2018-09-14 16:01:28,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:01:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 22430 states and 33170 transitions. [2018-09-14 16:01:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-14 16:01:28,369 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:28,369 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:28,369 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 818933703, now seen corresponding path program 1 times [2018-09-14 16:01:28,370 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:28,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:28,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:28,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:28,371 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:28,769 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-09-14 16:01:29,226 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 16:01:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 42 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:01:29,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:29,602 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:29,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:29,619 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:29,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:31,237 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-14 16:01:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:31,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:31,804 WARN L178 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-09-14 16:01:32,037 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-09-14 16:01:32,747 WARN L178 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-09-14 16:01:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:33,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:33,283 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 [2018-09-14 16:01:33,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:33,299 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:33,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:33,768 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:33,909 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-09-14 16:01:34,093 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-09-14 16:01:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:34,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:34,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 16 [2018-09-14 16:01:34,269 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:34,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:01:34,271 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:01:34,271 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:01:34,271 INFO L87 Difference]: Start difference. First operand 22430 states and 33170 transitions. Second operand 12 states. [2018-09-14 16:01:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:45,756 INFO L93 Difference]: Finished difference Result 103372 states and 172556 transitions. [2018-09-14 16:01:45,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-14 16:01:45,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 255 [2018-09-14 16:01:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:46,207 INFO L225 Difference]: With dead ends: 103372 [2018-09-14 16:01:46,208 INFO L226 Difference]: Without dead ends: 80948 [2018-09-14 16:01:46,615 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1193 GetRequests, 1093 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1557, Invalid=8543, Unknown=0, NotChecked=0, Total=10100 [2018-09-14 16:01:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80948 states. [2018-09-14 16:01:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80948 to 79229. [2018-09-14 16:01:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79229 states. [2018-09-14 16:01:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79229 states to 79229 states and 108201 transitions. [2018-09-14 16:01:48,676 INFO L78 Accepts]: Start accepts. Automaton has 79229 states and 108201 transitions. Word has length 255 [2018-09-14 16:01:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:48,676 INFO L480 AbstractCegarLoop]: Abstraction has 79229 states and 108201 transitions. [2018-09-14 16:01:48,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:01:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 79229 states and 108201 transitions. [2018-09-14 16:01:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-14 16:01:48,776 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:48,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:48,777 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1088752774, now seen corresponding path program 1 times [2018-09-14 16:01:48,777 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:48,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:48,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:48,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:48,778 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:49,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:49,305 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 [2018-09-14 16:01:49,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:49,317 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:49,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:49,646 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:50,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:50,081 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 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:01:50,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:50,098 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:50,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:50,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:51,193 WARN L178 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 16:01:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:51,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:51,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-14 16:01:51,306 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:51,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:01:51,307 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:01:51,308 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:01:51,308 INFO L87 Difference]: Start difference. First operand 79229 states and 108201 transitions. Second operand 6 states. [2018-09-14 16:01:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:54,718 INFO L93 Difference]: Finished difference Result 144203 states and 206871 transitions. [2018-09-14 16:01:54,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:01:54,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 264 [2018-09-14 16:01:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:54,971 INFO L225 Difference]: With dead ends: 144203 [2018-09-14 16:01:54,971 INFO L226 Difference]: Without dead ends: 64980 [2018-09-14 16:01:55,160 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1052 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:01:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64980 states. [2018-09-14 16:01:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64980 to 63719. [2018-09-14 16:01:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63719 states. [2018-09-14 16:01:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63719 states to 63719 states and 81729 transitions. [2018-09-14 16:01:56,914 INFO L78 Accepts]: Start accepts. Automaton has 63719 states and 81729 transitions. Word has length 264 [2018-09-14 16:01:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:56,914 INFO L480 AbstractCegarLoop]: Abstraction has 63719 states and 81729 transitions. [2018-09-14 16:01:56,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:01:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 63719 states and 81729 transitions. [2018-09-14 16:01:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-09-14 16:01:56,973 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:56,974 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:56,974 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:56,974 INFO L82 PathProgramCache]: Analyzing trace with hash -490604808, now seen corresponding path program 1 times [2018-09-14 16:01:56,974 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:56,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:56,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:56,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:56,975 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:57,491 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:01:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:01:57,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:57,700 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 [2018-09-14 16:01:57,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:57,716 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:57,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:01:58,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:01:58,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:58,126 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 [2018-09-14 16:01:58,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:58,149 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:58,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:01:58,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:01:58,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:58,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 16:01:58,806 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:58,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:01:58,807 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:01:58,807 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:01:58,808 INFO L87 Difference]: Start difference. First operand 63719 states and 81729 transitions. Second operand 9 states. [2018-09-14 16:02:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:08,368 INFO L93 Difference]: Finished difference Result 157636 states and 222547 transitions. [2018-09-14 16:02:08,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-14 16:02:08,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 281 [2018-09-14 16:02:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:08,797 INFO L225 Difference]: With dead ends: 157636 [2018-09-14 16:02:08,797 INFO L226 Difference]: Without dead ends: 93928 [2018-09-14 16:02:08,992 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 1153 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=641, Invalid=2665, Unknown=0, NotChecked=0, Total=3306 [2018-09-14 16:02:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93928 states. [2018-09-14 16:02:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93928 to 90874. [2018-09-14 16:02:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90874 states. [2018-09-14 16:02:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90874 states to 90874 states and 108588 transitions. [2018-09-14 16:02:11,879 INFO L78 Accepts]: Start accepts. Automaton has 90874 states and 108588 transitions. Word has length 281 [2018-09-14 16:02:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:11,880 INFO L480 AbstractCegarLoop]: Abstraction has 90874 states and 108588 transitions. [2018-09-14 16:02:11,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:02:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 90874 states and 108588 transitions. [2018-09-14 16:02:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-09-14 16:02:11,942 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:11,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:11,942 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1134781832, now seen corresponding path program 1 times [2018-09-14 16:02:11,943 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:11,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:11,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:11,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:11,944 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:12,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:12,423 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:12,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:12,431 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:12,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:12,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:13,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:13,372 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:13,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:13,388 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:13,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:14,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:15,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:15,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 23 [2018-09-14 16:02:15,234 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:15,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:02:15,235 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:02:15,235 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2018-09-14 16:02:15,236 INFO L87 Difference]: Start difference. First operand 90874 states and 108588 transitions. Second operand 9 states. [2018-09-14 16:02:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:25,612 INFO L93 Difference]: Finished difference Result 208285 states and 272216 transitions. [2018-09-14 16:02:25,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-14 16:02:25,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2018-09-14 16:02:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:26,148 INFO L225 Difference]: With dead ends: 208285 [2018-09-14 16:02:26,148 INFO L226 Difference]: Without dead ends: 118820 [2018-09-14 16:02:26,329 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1247 GetRequests, 1189 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=464, Invalid=3076, Unknown=0, NotChecked=0, Total=3540 [2018-09-14 16:02:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118820 states. [2018-09-14 16:02:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118820 to 112546. [2018-09-14 16:02:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112546 states. [2018-09-14 16:02:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112546 states to 112546 states and 133298 transitions. [2018-09-14 16:02:29,363 INFO L78 Accepts]: Start accepts. Automaton has 112546 states and 133298 transitions. Word has length 297 [2018-09-14 16:02:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:29,363 INFO L480 AbstractCegarLoop]: Abstraction has 112546 states and 133298 transitions. [2018-09-14 16:02:29,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:02:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 112546 states and 133298 transitions. [2018-09-14 16:02:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-09-14 16:02:29,440 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:29,440 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:29,441 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1717251398, now seen corresponding path program 1 times [2018-09-14 16:02:29,441 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:29,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:29,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:29,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:29,442 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:30,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:30,023 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:30,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:30,031 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:30,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:30,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:30,642 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-09-14 16:02:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 123 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:30,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:30,963 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:30,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:30,979 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:31,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-09-14 16:02:31,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 118 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:32,506 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:02:32,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 8, 8, 5] total 23 [2018-09-14 16:02:32,506 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:02:32,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:02:32,507 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:02:32,507 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2018-09-14 16:02:32,508 INFO L87 Difference]: Start difference. First operand 112546 states and 133298 transitions. Second operand 5 states. [2018-09-14 16:02:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:35,631 INFO L93 Difference]: Finished difference Result 216096 states and 255798 transitions. [2018-09-14 16:02:35,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:02:35,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2018-09-14 16:02:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:35,908 INFO L225 Difference]: With dead ends: 216096 [2018-09-14 16:02:35,908 INFO L226 Difference]: Without dead ends: 114037 [2018-09-14 16:02:36,033 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1330 GetRequests, 1305 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:02:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114037 states. [2018-09-14 16:02:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114037 to 113945. [2018-09-14 16:02:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113945 states. [2018-09-14 16:02:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113945 states to 113945 states and 134898 transitions. [2018-09-14 16:02:38,511 INFO L78 Accepts]: Start accepts. Automaton has 113945 states and 134898 transitions. Word has length 331 [2018-09-14 16:02:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:38,511 INFO L480 AbstractCegarLoop]: Abstraction has 113945 states and 134898 transitions. [2018-09-14 16:02:38,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:02:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 113945 states and 134898 transitions. [2018-09-14 16:02:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-09-14 16:02:38,594 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:38,595 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:38,595 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1413684658, now seen corresponding path program 1 times [2018-09-14 16:02:38,595 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:38,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:38,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:38,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:38,597 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 128 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-14 16:02:39,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:39,333 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 [2018-09-14 16:02:39,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:39,340 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:39,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-14 16:02:39,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 128 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-14 16:02:40,026 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:02:40,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:02:40,026 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:02:40,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:02:40,027 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:02:40,027 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:02:40,028 INFO L87 Difference]: Start difference. First operand 113945 states and 134898 transitions. Second operand 5 states. [2018-09-14 16:02:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:43,371 INFO L93 Difference]: Finished difference Result 260649 states and 310056 transitions. [2018-09-14 16:02:43,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:02:43,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2018-09-14 16:02:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:43,675 INFO L225 Difference]: With dead ends: 260649 [2018-09-14 16:02:43,676 INFO L226 Difference]: Without dead ends: 146720 [2018-09-14 16:02:43,822 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 693 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:02:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146720 states. [2018-09-14 16:02:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146720 to 144506. [2018-09-14 16:02:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144506 states. [2018-09-14 16:02:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144506 states to 144506 states and 170712 transitions. [2018-09-14 16:02:46,351 INFO L78 Accepts]: Start accepts. Automaton has 144506 states and 170712 transitions. Word has length 349 [2018-09-14 16:02:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:46,352 INFO L480 AbstractCegarLoop]: Abstraction has 144506 states and 170712 transitions. [2018-09-14 16:02:46,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:02:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 144506 states and 170712 transitions. [2018-09-14 16:02:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-09-14 16:02:46,432 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:46,432 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:46,432 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1077315670, now seen corresponding path program 1 times [2018-09-14 16:02:46,433 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:46,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:46,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:46,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:46,434 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 181 proven. 29 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-14 16:02:47,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:47,055 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:47,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:47,070 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:47,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-14 16:02:47,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-14 16:02:48,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:48,102 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:48,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:48,117 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:48,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-14 16:02:48,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-14 16:02:48,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:48,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:02:48,980 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:48,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:02:48,981 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:02:48,981 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:02:48,981 INFO L87 Difference]: Start difference. First operand 144506 states and 170712 transitions. Second operand 9 states. [2018-09-14 16:03:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:00,399 INFO L93 Difference]: Finished difference Result 478427 states and 580289 transitions. [2018-09-14 16:03:00,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:03:00,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 374 [2018-09-14 16:03:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:01,427 INFO L225 Difference]: With dead ends: 478427 [2018-09-14 16:03:01,427 INFO L226 Difference]: Without dead ends: 336796 [2018-09-14 16:03:01,677 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1511 GetRequests, 1487 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-14 16:03:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336796 states. [2018-09-14 16:03:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336796 to 334367. [2018-09-14 16:03:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334367 states. [2018-09-14 16:03:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334367 states to 334367 states and 394067 transitions. [2018-09-14 16:03:08,074 INFO L78 Accepts]: Start accepts. Automaton has 334367 states and 394067 transitions. Word has length 374 [2018-09-14 16:03:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:08,074 INFO L480 AbstractCegarLoop]: Abstraction has 334367 states and 394067 transitions. [2018-09-14 16:03:08,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:03:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 334367 states and 394067 transitions. [2018-09-14 16:03:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-09-14 16:03:08,172 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:08,172 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:08,173 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash -613168667, now seen corresponding path program 1 times [2018-09-14 16:03:08,173 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:08,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:08,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:08,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:08,174 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-14 16:03:08,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:08,537 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:08,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:08,546 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:08,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-14 16:03:08,906 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-14 16:03:10,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:10,069 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:03:10,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:10,085 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:10,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 167 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-14 16:03:10,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-14 16:03:10,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:03:10,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 10 [2018-09-14 16:03:10,893 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:03:10,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:03:10,894 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:03:10,895 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:03:10,895 INFO L87 Difference]: Start difference. First operand 334367 states and 394067 transitions. Second operand 7 states. [2018-09-14 16:03:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:30,671 INFO L93 Difference]: Finished difference Result 1232313 states and 1543422 transitions. [2018-09-14 16:03:30,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:03:30,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 379 [2018-09-14 16:03:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:34,013 INFO L225 Difference]: With dead ends: 1232313 [2018-09-14 16:03:34,014 INFO L226 Difference]: Without dead ends: 903713 [2018-09-14 16:03:34,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1524 GetRequests, 1510 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:03:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903713 states. [2018-09-14 16:04:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903713 to 879335. [2018-09-14 16:04:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879335 states. [2018-09-14 16:04:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879335 states to 879335 states and 1042138 transitions. [2018-09-14 16:04:08,113 INFO L78 Accepts]: Start accepts. Automaton has 879335 states and 1042138 transitions. Word has length 379 [2018-09-14 16:04:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:08,114 INFO L480 AbstractCegarLoop]: Abstraction has 879335 states and 1042138 transitions. [2018-09-14 16:04:08,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:04:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 879335 states and 1042138 transitions. [2018-09-14 16:04:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-09-14 16:04:08,331 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:08,331 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, 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] [2018-09-14 16:04:08,332 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash -948773423, now seen corresponding path program 1 times [2018-09-14 16:04:08,332 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:08,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:08,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:08,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:08,333 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 202 proven. 90 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-09-14 16:04:08,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:08,705 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:08,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:08,713 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:08,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 231 proven. 2 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2018-09-14 16:04:10,377 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 187 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:04:10,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:10,874 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:10,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:10,891 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:11,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 231 proven. 2 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2018-09-14 16:04:11,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 187 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:04:12,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:12,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-14 16:04:12,308 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:12,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:04:12,310 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:04:12,311 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:04:12,311 INFO L87 Difference]: Start difference. First operand 879335 states and 1042138 transitions. Second operand 12 states. [2018-09-14 16:04:22,149 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 20 Received shutdown request... [2018-09-14 16:04:28,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-14 16:04:28,136 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:04:28,142 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:04:28,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:04:28 BoogieIcfgContainer [2018-09-14 16:04:28,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:04:28,143 INFO L168 Benchmark]: Toolchain (without parser) took 211988.77 ms. Allocated memory was 1.6 GB in the beginning and 5.6 GB in the end (delta: 4.1 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -481.9 MB). Peak memory consumption was 3.6 GB. Max. memory is 7.1 GB. [2018-09-14 16:04:28,144 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:04:28,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1325.50 ms. Allocated memory is still 1.6 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. [2018-09-14 16:04:28,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 165.39 ms. Allocated memory is still 1.6 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:04:28,146 INFO L168 Benchmark]: Boogie Preprocessor took 406.60 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 819.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -954.7 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:04:28,147 INFO L168 Benchmark]: RCFGBuilder took 4641.15 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 258.7 MB). Peak memory consumption was 258.7 MB. Max. memory is 7.1 GB. [2018-09-14 16:04:28,147 INFO L168 Benchmark]: TraceAbstraction took 205443.51 ms. Allocated memory was 2.4 GB in the beginning and 5.6 GB in the end (delta: 3.2 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 108.3 MB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. [2018-09-14 16:04:28,152 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 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1325.50 ms. Allocated memory is still 1.6 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 165.39 ms. Allocated memory is still 1.6 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 406.60 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 819.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -954.7 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4641.15 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 258.7 MB). Peak memory consumption was 258.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205443.51 ms. Allocated memory was 2.4 GB in the beginning and 5.6 GB in the end (delta: 3.2 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 108.3 MB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1635]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1635). Cancelled while BasicCegarLoop was constructing difference of abstraction (879335states) and FLOYD_HOARE automaton (currently 82 states, 12 states before enhancement), while ReachableStatesComputation was computing reachable states (318390 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 205.3s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 114.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4108 SDtfs, 28682 SDslu, 6813 SDs, 0 SdLazy, 38408 SolverSat, 8669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 55.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12528 GetRequests, 12089 SyntacticMatches, 28 SemanticMatches, 411 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8937 ImplicationChecksByTransitivity, 17.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=879335occurred in iteration=14, 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: 55.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 41795 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 24.4s InterpolantComputationTime, 10270 NumberOfCodeBlocks, 10270 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 16205 ConstructedInterpolants, 0 QuantifiedInterpolants, 13103675 SizeOfPredicates, 90 NumberOfNonLiveVariables, 23460 ConjunctsInSsa, 268 ConjunctsInUnsatCore, 53 InterpolantComputations, 8 PerfectInterpolantSequences, 7175/8036 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_label15_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-04-28-164.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label15_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-04-28-164.csv Completed graceful shutdown