java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label24_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 12:29:17,289 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 12:29:17,291 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 12:29:17,303 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 12:29:17,303 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 12:29:17,304 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 12:29:17,305 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 12:29:17,307 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 12:29:17,309 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 12:29:17,310 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 12:29:17,311 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 12:29:17,311 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 12:29:17,312 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 12:29:17,313 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 12:29:17,314 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 12:29:17,315 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 12:29:17,316 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 12:29:17,318 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 12:29:17,320 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 12:29:17,321 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 12:29:17,322 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 12:29:17,324 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 12:29:17,326 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 12:29:17,326 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 12:29:17,327 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 12:29:17,328 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 12:29:17,329 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 12:29:17,329 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 12:29:17,330 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 12:29:17,331 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 12:29:17,332 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 12:29:17,332 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 12:29:17,333 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 12:29:17,333 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 12:29:17,334 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 12:29:17,334 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 12:29:17,335 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 12:29:17,359 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 12:29:17,359 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 12:29:17,361 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 12:29:17,361 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 12:29:17,361 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 12:29:17,361 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 12:29:17,361 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 12:29:17,362 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 12:29:17,362 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 12:29:17,362 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 12:29:17,362 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 12:29:17,362 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 12:29:17,366 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 12:29:17,367 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 12:29:17,367 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 12:29:17,367 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 12:29:17,367 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 12:29:17,367 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 12:29:17,368 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 12:29:17,370 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 12:29:17,370 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 12:29:17,370 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 12:29:17,370 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 12:29:17,370 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 12:29:17,371 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:29:17,371 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 12:29:17,371 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 12:29:17,371 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 12:29:17,372 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 12:29:17,372 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 12:29:17,372 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 12:29:17,372 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 12:29:17,372 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 12:29:17,373 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 12:29:17,425 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 12:29:17,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 12:29:17,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 12:29:17,446 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 12:29:17,447 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 12:29:17,447 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label24_true-unreach-call.c [2018-10-27 12:29:17,518 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/df1b0abd9/30dc3cde8a504117ab2f76d30c47439a/FLAGd42b8e47e [2018-10-27 12:29:18,148 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 12:29:18,149 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label24_true-unreach-call.c [2018-10-27 12:29:18,174 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/df1b0abd9/30dc3cde8a504117ab2f76d30c47439a/FLAGd42b8e47e [2018-10-27 12:29:18,196 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/df1b0abd9/30dc3cde8a504117ab2f76d30c47439a [2018-10-27 12:29:18,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 12:29:18,209 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 12:29:18,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 12:29:18,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 12:29:18,214 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 12:29:18,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:29:18" (1/1) ... [2018-10-27 12:29:18,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@afc856a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:18, skipping insertion in model container [2018-10-27 12:29:18,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:29:18" (1/1) ... [2018-10-27 12:29:18,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 12:29:18,337 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 12:29:19,040 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:29:19,045 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 12:29:19,412 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:29:19,439 INFO L193 MainTranslator]: Completed translation [2018-10-27 12:29:19,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19 WrapperNode [2018-10-27 12:29:19,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 12:29:19,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 12:29:19,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 12:29:19,441 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 12:29:19,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 12:29:19,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 12:29:19,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 12:29:19,762 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 12:29:19,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... [2018-10-27 12:29:19,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 12:29:19,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 12:29:19,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 12:29:19,906 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 12:29:19,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:29:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 12:29:19,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 12:29:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 12:29:19,980 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 12:29:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 12:29:19,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 12:29:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 12:29:19,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 12:29:24,985 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 12:29:24,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:29:24 BoogieIcfgContainer [2018-10-27 12:29:24,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 12:29:24,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 12:29:24,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 12:29:24,994 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 12:29:24,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:29:18" (1/3) ... [2018-10-27 12:29:24,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546eb8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:29:24, skipping insertion in model container [2018-10-27 12:29:24,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:29:19" (2/3) ... [2018-10-27 12:29:24,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546eb8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:29:24, skipping insertion in model container [2018-10-27 12:29:24,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:29:24" (3/3) ... [2018-10-27 12:29:24,998 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label24_true-unreach-call.c [2018-10-27 12:29:25,009 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 12:29:25,026 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 12:29:25,044 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 12:29:25,102 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 12:29:25,102 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 12:29:25,102 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 12:29:25,102 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 12:29:25,103 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 12:29:25,103 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 12:29:25,103 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 12:29:25,103 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 12:29:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 12:29:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-27 12:29:25,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:25,174 INFO L375 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] [2018-10-27 12:29:25,178 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:25,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2097974209, now seen corresponding path program 1 times [2018-10-27 12:29:25,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:25,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:25,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:25,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:25,252 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:26,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:29:26,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 12:29:26,347 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:26,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:29:26,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:29:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:26,368 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 12:29:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:29:28,418 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-10-27 12:29:28,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:29:28,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2018-10-27 12:29:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:29:28,450 INFO L225 Difference]: With dead ends: 844 [2018-10-27 12:29:28,451 INFO L226 Difference]: Without dead ends: 530 [2018-10-27 12:29:28,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-10-27 12:29:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-10-27 12:29:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-10-27 12:29:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-10-27 12:29:28,595 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 198 [2018-10-27 12:29:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:29:28,596 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-10-27 12:29:28,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:29:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-10-27 12:29:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-27 12:29:28,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:28,621 INFO L375 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] [2018-10-27 12:29:28,621 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:28,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:28,622 INFO L82 PathProgramCache]: Analyzing trace with hash -901742011, now seen corresponding path program 1 times [2018-10-27 12:29:28,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:28,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:28,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:28,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:28,626 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:29,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:29:29,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 12:29:29,159 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:29,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:29:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:29:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:29,164 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-10-27 12:29:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:29:31,126 INFO L93 Difference]: Finished difference Result 1473 states and 2495 transitions. [2018-10-27 12:29:31,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:29:31,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2018-10-27 12:29:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:29:31,136 INFO L225 Difference]: With dead ends: 1473 [2018-10-27 12:29:31,136 INFO L226 Difference]: Without dead ends: 954 [2018-10-27 12:29:31,140 INFO L605 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 [2018-10-27 12:29:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-10-27 12:29:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 953. [2018-10-27 12:29:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-10-27 12:29:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1483 transitions. [2018-10-27 12:29:31,180 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1483 transitions. Word has length 211 [2018-10-27 12:29:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:29:31,181 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1483 transitions. [2018-10-27 12:29:31,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:29:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1483 transitions. [2018-10-27 12:29:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-27 12:29:31,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:31,187 INFO L375 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] [2018-10-27 12:29:31,188 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:31,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1723298015, now seen corresponding path program 1 times [2018-10-27 12:29:31,188 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:31,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:31,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:31,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:31,190 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:31,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:29:31,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 12:29:31,540 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:31,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:29:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:29:31,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:31,542 INFO L87 Difference]: Start difference. First operand 953 states and 1483 transitions. Second operand 3 states. [2018-10-27 12:29:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:29:34,489 INFO L93 Difference]: Finished difference Result 2750 states and 4390 transitions. [2018-10-27 12:29:34,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:29:34,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2018-10-27 12:29:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:29:34,509 INFO L225 Difference]: With dead ends: 2750 [2018-10-27 12:29:34,509 INFO L226 Difference]: Without dead ends: 1803 [2018-10-27 12:29:34,514 INFO L605 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 [2018-10-27 12:29:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2018-10-27 12:29:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1786. [2018-10-27 12:29:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2018-10-27 12:29:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2741 transitions. [2018-10-27 12:29:34,599 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2741 transitions. Word has length 213 [2018-10-27 12:29:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:29:34,602 INFO L481 AbstractCegarLoop]: Abstraction has 1786 states and 2741 transitions. [2018-10-27 12:29:34,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:29:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2741 transitions. [2018-10-27 12:29:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-27 12:29:34,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:34,613 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:29:34,613 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:34,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash -989729704, now seen corresponding path program 1 times [2018-10-27 12:29:34,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:34,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:34,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:34,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:34,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:34,885 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 12:29:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:35,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:29:35,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:29:35,348 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:35,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:29:35,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:29:35,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:29:35,350 INFO L87 Difference]: Start difference. First operand 1786 states and 2741 transitions. Second operand 6 states. [2018-10-27 12:29:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:29:39,398 INFO L93 Difference]: Finished difference Result 5463 states and 9150 transitions. [2018-10-27 12:29:39,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 12:29:39,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2018-10-27 12:29:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:29:39,435 INFO L225 Difference]: With dead ends: 5463 [2018-10-27 12:29:39,435 INFO L226 Difference]: Without dead ends: 3683 [2018-10-27 12:29:39,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 12:29:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2018-10-27 12:29:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3579. [2018-10-27 12:29:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3579 states. [2018-10-27 12:29:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 5617 transitions. [2018-10-27 12:29:39,590 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 5617 transitions. Word has length 216 [2018-10-27 12:29:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:29:39,590 INFO L481 AbstractCegarLoop]: Abstraction has 3579 states and 5617 transitions. [2018-10-27 12:29:39,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:29:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 5617 transitions. [2018-10-27 12:29:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-27 12:29:39,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:39,608 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 12:29:39,608 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:39,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash -381167688, now seen corresponding path program 1 times [2018-10-27 12:29:39,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:39,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:39,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:39,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:39,610 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:39,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:29:39,837 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:29:39,838 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 232 with the following transitions: [2018-10-27 12:29:39,841 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [36], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:29:39,906 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:29:39,906 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:29:41,043 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:29:41,045 INFO L272 AbstractInterpreter]: Visited 199 different actions 199 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 12:29:41,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:41,091 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:29:42,253 INFO L227 lantSequenceWeakener]: Weakened 222 states. On average, predicates are now at 74.08% of their original sizes. [2018-10-27 12:29:42,253 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:29:44,148 INFO L415 sIntCurrentIteration]: We unified 230 AI predicates to 230 [2018-10-27 12:29:44,148 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:29:44,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:29:44,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-10-27 12:29:44,150 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:44,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 12:29:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 12:29:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-27 12:29:44,151 INFO L87 Difference]: Start difference. First operand 3579 states and 5617 transitions. Second operand 17 states. [2018-10-27 12:30:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:30:19,625 INFO L93 Difference]: Finished difference Result 7362 states and 11579 transitions. [2018-10-27 12:30:19,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 12:30:19,626 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 231 [2018-10-27 12:30:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:30:19,644 INFO L225 Difference]: With dead ends: 7362 [2018-10-27 12:30:19,644 INFO L226 Difference]: Without dead ends: 3789 [2018-10-27 12:30:19,656 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 233 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-10-27 12:30:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2018-10-27 12:30:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 3787. [2018-10-27 12:30:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3787 states. [2018-10-27 12:30:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 5835 transitions. [2018-10-27 12:30:19,761 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 5835 transitions. Word has length 231 [2018-10-27 12:30:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:30:19,761 INFO L481 AbstractCegarLoop]: Abstraction has 3787 states and 5835 transitions. [2018-10-27 12:30:19,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 12:30:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 5835 transitions. [2018-10-27 12:30:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-27 12:30:19,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:30:19,779 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 12:30:19,779 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:30:19,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:19,780 INFO L82 PathProgramCache]: Analyzing trace with hash -110227371, now seen corresponding path program 1 times [2018-10-27 12:30:19,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:30:19,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:19,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:30:19,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:19,781 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:30:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:30:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 51 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:30:20,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:30:20,063 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:30:20,063 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 244 with the following transitions: [2018-10-27 12:30:20,064 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [36], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:30:20,075 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:30:20,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:30:21,882 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:30:21,883 INFO L272 AbstractInterpreter]: Visited 203 different actions 402 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:30:21,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:21,892 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:30:23,205 INFO L227 lantSequenceWeakener]: Weakened 100 states. On average, predicates are now at 80.14% of their original sizes. [2018-10-27 12:30:23,205 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:30:26,522 INFO L415 sIntCurrentIteration]: We unified 242 AI predicates to 242 [2018-10-27 12:30:26,522 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:30:26,522 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:30:26,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [10] total 33 [2018-10-27 12:30:26,523 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:30:26,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-27 12:30:26,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-27 12:30:26,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2018-10-27 12:30:26,524 INFO L87 Difference]: Start difference. First operand 3787 states and 5835 transitions. Second operand 25 states. [2018-10-27 12:30:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:30:59,820 INFO L93 Difference]: Finished difference Result 7993 states and 12375 transitions. [2018-10-27 12:30:59,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 12:30:59,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 243 [2018-10-27 12:30:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:30:59,840 INFO L225 Difference]: With dead ends: 7993 [2018-10-27 12:30:59,840 INFO L226 Difference]: Without dead ends: 4420 [2018-10-27 12:30:59,851 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 253 GetRequests, 207 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2018-10-27 12:30:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2018-10-27 12:30:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 4415. [2018-10-27 12:30:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4415 states. [2018-10-27 12:30:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 6514 transitions. [2018-10-27 12:30:59,960 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 6514 transitions. Word has length 243 [2018-10-27 12:30:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:30:59,961 INFO L481 AbstractCegarLoop]: Abstraction has 4415 states and 6514 transitions. [2018-10-27 12:30:59,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-27 12:30:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 6514 transitions. [2018-10-27 12:30:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-27 12:30:59,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:30:59,980 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:30:59,980 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:30:59,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1571694760, now seen corresponding path program 1 times [2018-10-27 12:30:59,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:30:59,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:59,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:30:59,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:59,982 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-27 12:31:00,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:00,306 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:00,306 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-10-27 12:31:00,307 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:00,314 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:00,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:01,531 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:31:01,531 INFO L272 AbstractInterpreter]: Visited 204 different actions 400 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:31:01,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:01,543 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:31:01,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:01,543 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:31:01,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:01,553 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:31:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:01,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:31:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-27 12:31:02,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:31:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-27 12:31:02,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:31:02,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-10-27 12:31:02,815 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:31:02,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 12:31:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 12:31:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-27 12:31:02,817 INFO L87 Difference]: Start difference. First operand 4415 states and 6514 transitions. Second operand 8 states. [2018-10-27 12:31:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:31:08,442 INFO L93 Difference]: Finished difference Result 15285 states and 29085 transitions. [2018-10-27 12:31:08,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 12:31:08,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 249 [2018-10-27 12:31:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:31:08,544 INFO L225 Difference]: With dead ends: 15285 [2018-10-27 12:31:08,544 INFO L226 Difference]: Without dead ends: 11712 [2018-10-27 12:31:08,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-10-27 12:31:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2018-10-27 12:31:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 11470. [2018-10-27 12:31:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11470 states. [2018-10-27 12:31:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11470 states to 11470 states and 18550 transitions. [2018-10-27 12:31:09,112 INFO L78 Accepts]: Start accepts. Automaton has 11470 states and 18550 transitions. Word has length 249 [2018-10-27 12:31:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:31:09,113 INFO L481 AbstractCegarLoop]: Abstraction has 11470 states and 18550 transitions. [2018-10-27 12:31:09,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 12:31:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 11470 states and 18550 transitions. [2018-10-27 12:31:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-27 12:31:09,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:31:09,168 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:31:09,168 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:31:09,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash 600539593, now seen corresponding path program 1 times [2018-10-27 12:31:09,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:31:09,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:09,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:09,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:09,170 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:09,700 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 12:31:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 64 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-27 12:31:09,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:09,878 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:09,879 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2018-10-27 12:31:09,879 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [36], [37], [41], [45], [48], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:09,885 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:09,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:11,588 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:31:11,588 INFO L272 AbstractInterpreter]: Visited 204 different actions 400 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:31:11,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:11,595 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:31:11,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:11,595 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:31:11,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:11,605 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:31:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:11,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:31:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-27 12:31:11,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:31:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-27 12:31:12,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:31:12,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 12:31:12,170 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:31:12,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 12:31:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 12:31:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 12:31:12,171 INFO L87 Difference]: Start difference. First operand 11470 states and 18550 transitions. Second operand 9 states. [2018-10-27 12:31:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:31:21,217 INFO L93 Difference]: Finished difference Result 45075 states and 80901 transitions. [2018-10-27 12:31:21,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-27 12:31:21,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 253 [2018-10-27 12:31:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:31:21,454 INFO L225 Difference]: With dead ends: 45075 [2018-10-27 12:31:21,454 INFO L226 Difference]: Without dead ends: 34447 [2018-10-27 12:31:21,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 544 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=605, Invalid=2365, Unknown=0, NotChecked=0, Total=2970 [2018-10-27 12:31:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34447 states. [2018-10-27 12:31:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34447 to 32375. [2018-10-27 12:31:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32375 states. [2018-10-27 12:31:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32375 states to 32375 states and 48260 transitions. [2018-10-27 12:31:22,996 INFO L78 Accepts]: Start accepts. Automaton has 32375 states and 48260 transitions. Word has length 253 [2018-10-27 12:31:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:31:22,996 INFO L481 AbstractCegarLoop]: Abstraction has 32375 states and 48260 transitions. [2018-10-27 12:31:22,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 12:31:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 32375 states and 48260 transitions. [2018-10-27 12:31:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-27 12:31:23,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:31:23,123 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:31:23,124 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:31:23,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1088454084, now seen corresponding path program 1 times [2018-10-27 12:31:23,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:31:23,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:23,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:23,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:23,126 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:23,767 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 12:31:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:31:24,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:24,063 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:24,063 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 304 with the following transitions: [2018-10-27 12:31:24,064 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [350], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:24,070 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:24,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:26,020 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:31:26,020 INFO L272 AbstractInterpreter]: Visited 203 different actions 398 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:31:26,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:26,055 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:31:26,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:26,056 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:31:26,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:26,074 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:31:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:26,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:31:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 12:31:26,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:31:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 12:31:27,081 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:31:27,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 12:31:27,081 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:31:27,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:31:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:31:27,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 12:31:27,083 INFO L87 Difference]: Start difference. First operand 32375 states and 48260 transitions. Second operand 3 states. [2018-10-27 12:31:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:31:29,523 INFO L93 Difference]: Finished difference Result 85093 states and 130796 transitions. [2018-10-27 12:31:29,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:31:29,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2018-10-27 12:31:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:31:29,793 INFO L225 Difference]: With dead ends: 85093 [2018-10-27 12:31:29,793 INFO L226 Difference]: Without dead ends: 53141 [2018-10-27 12:31:29,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 604 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 12:31:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53141 states. [2018-10-27 12:31:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53141 to 53064. [2018-10-27 12:31:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53064 states. [2018-10-27 12:31:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53064 states to 53064 states and 79823 transitions. [2018-10-27 12:31:31,622 INFO L78 Accepts]: Start accepts. Automaton has 53064 states and 79823 transitions. Word has length 303 [2018-10-27 12:31:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:31:31,623 INFO L481 AbstractCegarLoop]: Abstraction has 53064 states and 79823 transitions. [2018-10-27 12:31:31,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:31:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 53064 states and 79823 transitions. [2018-10-27 12:31:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-27 12:31:31,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:31:31,737 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 12:31:31,737 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:31:31,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1272451628, now seen corresponding path program 1 times [2018-10-27 12:31:31,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:31:31,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:31,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:31,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:31,739 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:31:32,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:32,385 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:32,386 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 335 with the following transitions: [2018-10-27 12:31:32,386 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:32,392 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:32,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:34,132 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:31:34,132 INFO L272 AbstractInterpreter]: Visited 202 different actions 400 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:31:34,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:34,141 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:31:35,960 INFO L227 lantSequenceWeakener]: Weakened 331 states. On average, predicates are now at 72.66% of their original sizes. [2018-10-27 12:31:35,960 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:31:36,273 INFO L415 sIntCurrentIteration]: We unified 333 AI predicates to 333 [2018-10-27 12:31:36,273 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:31:36,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:31:36,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-10-27 12:31:36,274 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:31:36,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 12:31:36,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 12:31:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2018-10-27 12:31:36,275 INFO L87 Difference]: Start difference. First operand 53064 states and 79823 transitions. Second operand 19 states. [2018-10-27 12:32:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:32:12,366 INFO L93 Difference]: Finished difference Result 105762 states and 158399 transitions. [2018-10-27 12:32:12,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 12:32:12,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 334 [2018-10-27 12:32:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:32:12,636 INFO L225 Difference]: With dead ends: 105762 [2018-10-27 12:32:12,636 INFO L226 Difference]: Without dead ends: 54155 [2018-10-27 12:32:12,776 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 342 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2018-10-27 12:32:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54155 states. [2018-10-27 12:32:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54155 to 54045. [2018-10-27 12:32:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54045 states. [2018-10-27 12:32:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54045 states to 54045 states and 80062 transitions. [2018-10-27 12:32:14,252 INFO L78 Accepts]: Start accepts. Automaton has 54045 states and 80062 transitions. Word has length 334 [2018-10-27 12:32:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:32:14,253 INFO L481 AbstractCegarLoop]: Abstraction has 54045 states and 80062 transitions. [2018-10-27 12:32:14,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-27 12:32:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 54045 states and 80062 transitions. [2018-10-27 12:32:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-10-27 12:32:14,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:32:14,362 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2018-10-27 12:32:14,362 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:32:14,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash -588881806, now seen corresponding path program 1 times [2018-10-27 12:32:14,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:32:14,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:14,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:14,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:14,364 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:32:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 191 proven. 100 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-10-27 12:32:14,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:14,662 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:32:14,662 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 372 with the following transitions: [2018-10-27 12:32:14,662 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [123], [124], [128], [132], [136], [139], [140], [144], [148], [151], [156], [158], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:32:14,668 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:32:14,668 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:32:16,441 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:32:16,441 INFO L272 AbstractInterpreter]: Visited 206 different actions 407 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:32:16,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:16,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:32:16,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:16,449 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:32:16,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:16,459 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:32:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:16,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:32:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2018-10-27 12:32:17,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:32:17,393 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-27 12:32:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 191 proven. 100 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-10-27 12:32:17,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:32:17,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-10-27 12:32:17,920 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:32:17,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 12:32:17,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 12:32:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-27 12:32:17,922 INFO L87 Difference]: Start difference. First operand 54045 states and 80062 transitions. Second operand 7 states. [2018-10-27 12:32:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:32:22,595 INFO L93 Difference]: Finished difference Result 123365 states and 188375 transitions. [2018-10-27 12:32:22,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 12:32:22,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 371 [2018-10-27 12:32:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:32:23,044 INFO L225 Difference]: With dead ends: 123365 [2018-10-27 12:32:23,045 INFO L226 Difference]: Without dead ends: 72896 [2018-10-27 12:32:23,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 741 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-27 12:32:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72896 states. [2018-10-27 12:32:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72896 to 71899. [2018-10-27 12:32:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71899 states. [2018-10-27 12:32:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71899 states to 71899 states and 101932 transitions. [2018-10-27 12:32:25,953 INFO L78 Accepts]: Start accepts. Automaton has 71899 states and 101932 transitions. Word has length 371 [2018-10-27 12:32:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:32:25,953 INFO L481 AbstractCegarLoop]: Abstraction has 71899 states and 101932 transitions. [2018-10-27 12:32:25,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 12:32:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 71899 states and 101932 transitions. [2018-10-27 12:32:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-10-27 12:32:26,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:32:26,112 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:32:26,112 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:32:26,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1570967325, now seen corresponding path program 1 times [2018-10-27 12:32:26,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:32:26,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:26,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:26,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:26,114 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:32:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 211 proven. 103 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-10-27 12:32:26,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:26,554 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:32:26,554 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 392 with the following transitions: [2018-10-27 12:32:26,554 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [151], [156], [158], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:32:26,559 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:32:26,560 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:32:28,121 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:32:28,122 INFO L272 AbstractInterpreter]: Visited 206 different actions 407 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:32:28,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:28,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:32:28,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:28,128 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:32:28,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:28,137 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:32:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:28,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:32:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 328 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-10-27 12:32:28,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:32:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 255 proven. 96 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-10-27 12:32:29,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:32:29,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 12:32:29,332 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:32:29,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 12:32:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 12:32:29,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 12:32:29,334 INFO L87 Difference]: Start difference. First operand 71899 states and 101932 transitions. Second operand 9 states. [2018-10-27 12:32:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:32:33,721 INFO L93 Difference]: Finished difference Result 147445 states and 207977 transitions. [2018-10-27 12:32:33,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 12:32:33,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 391 [2018-10-27 12:32:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:32:34,008 INFO L225 Difference]: With dead ends: 147445 [2018-10-27 12:32:34,009 INFO L226 Difference]: Without dead ends: 78761 [2018-10-27 12:32:34,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2018-10-27 12:32:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78761 states. [2018-10-27 12:32:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78761 to 78334. [2018-10-27 12:32:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78334 states. [2018-10-27 12:32:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78334 states to 78334 states and 103124 transitions. [2018-10-27 12:32:35,569 INFO L78 Accepts]: Start accepts. Automaton has 78334 states and 103124 transitions. Word has length 391 [2018-10-27 12:32:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:32:35,569 INFO L481 AbstractCegarLoop]: Abstraction has 78334 states and 103124 transitions. [2018-10-27 12:32:35,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 12:32:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 78334 states and 103124 transitions. [2018-10-27 12:32:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-10-27 12:32:35,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:32:35,691 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 12:32:35,691 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:32:35,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash 15583462, now seen corresponding path program 1 times [2018-10-27 12:32:35,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:32:35,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:35,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:35,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:35,693 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:32:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:36,904 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 12:32:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 254 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-10-27 12:32:37,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:37,256 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:32:37,257 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 425 with the following transitions: [2018-10-27 12:32:37,257 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [562], [567], [569], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:32:37,263 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:32:37,264 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:32:38,762 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:32:38,763 INFO L272 AbstractInterpreter]: Visited 204 different actions 400 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:32:38,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:38,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:32:38,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:38,773 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:32:38,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:38,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:32:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:39,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:32:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-27 12:32:39,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:32:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-27 12:32:39,334 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:32:39,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-10-27 12:32:39,335 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:32:39,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:32:39,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:32:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-27 12:32:39,336 INFO L87 Difference]: Start difference. First operand 78334 states and 103124 transitions. Second operand 3 states. [2018-10-27 12:32:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:32:44,492 INFO L93 Difference]: Finished difference Result 158644 states and 211008 transitions. [2018-10-27 12:32:44,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:32:44,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 424 [2018-10-27 12:32:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:32:44,775 INFO L225 Difference]: With dead ends: 158644 [2018-10-27 12:32:44,775 INFO L226 Difference]: Without dead ends: 81934 [2018-10-27 12:32:44,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-27 12:32:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81934 states. [2018-10-27 12:32:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81934 to 81787. [2018-10-27 12:32:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81787 states. [2018-10-27 12:32:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81787 states to 81787 states and 108397 transitions. [2018-10-27 12:32:46,208 INFO L78 Accepts]: Start accepts. Automaton has 81787 states and 108397 transitions. Word has length 424 [2018-10-27 12:32:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:32:46,209 INFO L481 AbstractCegarLoop]: Abstraction has 81787 states and 108397 transitions. [2018-10-27 12:32:46,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:32:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 81787 states and 108397 transitions. [2018-10-27 12:32:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-10-27 12:32:46,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:32:46,358 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:32:46,358 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:32:46,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash 867587049, now seen corresponding path program 1 times [2018-10-27 12:32:46,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:32:46,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:46,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:46,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:46,360 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:32:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2018-10-27 12:32:46,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:46,887 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:32:46,887 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 500 with the following transitions: [2018-10-27 12:32:46,887 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [460], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [519], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1045], [1047], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:32:46,892 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:32:46,892 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:32:49,280 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:32:49,280 INFO L272 AbstractInterpreter]: Visited 205 different actions 609 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 12:32:49,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:49,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:32:49,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:49,282 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:32:49,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:49,290 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:32:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:49,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:32:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2018-10-27 12:32:49,731 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:32:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2018-10-27 12:32:50,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:32:50,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-10-27 12:32:50,005 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:32:50,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:32:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:32:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 12:32:50,007 INFO L87 Difference]: Start difference. First operand 81787 states and 108397 transitions. Second operand 6 states. Received shutdown request... [2018-10-27 12:32:51,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 12:32:51,275 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 12:32:51,282 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 12:32:51,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:32:51 BoogieIcfgContainer [2018-10-27 12:32:51,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 12:32:51,284 INFO L168 Benchmark]: Toolchain (without parser) took 213075.81 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -966.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-27 12:32:51,285 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 12:32:51,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1230.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:51,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 320.79 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 722.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -852.8 MB). Peak memory consumption was 40.2 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:51,287 INFO L168 Benchmark]: Boogie Preprocessor took 143.33 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:51,288 INFO L168 Benchmark]: RCFGBuilder took 5080.97 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 262.5 MB). Peak memory consumption was 262.5 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:51,288 INFO L168 Benchmark]: TraceAbstraction took 206295.42 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 2.4 GB in the end (delta: -475.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-27 12:32:51,293 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1230.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 320.79 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 722.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -852.8 MB). Peak memory consumption was 40.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.33 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5080.97 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 262.5 MB). Peak memory consumption was 262.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206295.42 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 2.4 GB in the end (delta: -475.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1608]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1608). Cancelled while BasicCegarLoop was constructing difference of abstraction (81787states) and FLOYD_HOARE automaton (currently 8 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (2150 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 206.1s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 151.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4153 SDtfs, 16376 SDslu, 4245 SDs, 0 SdLazy, 29377 SolverSat, 4865 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76.4s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 5992 GetRequests, 5769 SyntacticMatches, 23 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81787occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 17.0s AbstIntTime, 10 AbstIntIterations, 3 AbstIntStrong, 0.9990595200459461 AbsIntWeakeningRatio, 0.2422360248447205 AbsIntAvgWeakeningVarsNumRemoved, 48.88447204968944 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 4206 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 6626 NumberOfCodeBlocks, 6626 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 9088 ConstructedInterpolants, 0 QuantifiedInterpolants, 6113270 SizeOfPredicates, 6 NumberOfNonLiveVariables, 9886 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 6207/6748 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown