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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:18:19,214 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:18:19,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:18:19,235 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:18:19,235 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:18:19,239 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:18:19,240 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:18:19,245 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:18:19,248 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:18:19,253 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:18:19,254 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:18:19,254 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:18:19,259 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:18:19,261 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:18:19,264 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:18:19,265 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:18:19,266 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:18:19,271 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:18:19,276 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:18:19,278 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:18:19,280 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:18:19,282 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:18:19,284 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:18:19,284 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:18:19,285 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:18:19,285 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:18:19,289 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:18:19,290 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:18:19,290 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:18:19,294 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:18:19,294 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:18:19,297 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:18:19,297 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:18:19,298 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:18:19,299 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:18:19,299 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:18:19,300 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 06:18:19,332 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:18:19,332 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:18:19,333 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 06:18:19,334 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 06:18:19,337 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 06:18:19,337 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 06:18:19,337 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 06:18:19,338 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 06:18:19,338 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 06:18:19,338 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 06:18:19,338 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 06:18:19,338 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 06:18:19,339 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 06:18:19,339 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 06:18:19,340 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:18:19,340 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:18:19,341 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:18:19,342 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 06:18:19,343 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 06:18:19,343 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 06:18:19,343 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:18:19,343 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 06:18:19,343 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:18:19,344 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:18:19,344 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 06:18:19,344 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 06:18:19,344 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 06:18:19,345 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:18:19,345 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 06:18:19,345 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 06:18:19,345 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 06:18:19,346 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 06:18:19,346 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 06:18:19,346 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 06:18:19,346 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 06:18:19,346 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 06:18:19,421 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:18:19,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:18:19,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:18:19,446 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:18:19,447 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:18:19,448 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16_true-unreach-call.c [2018-10-27 06:18:19,521 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e8ebb9b8/1c199b0ea10e4e7d83873d8f4e47b8ce/FLAG32200d421 [2018-10-27 06:18:20,262 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:18:20,263 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label16_true-unreach-call.c [2018-10-27 06:18:20,280 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e8ebb9b8/1c199b0ea10e4e7d83873d8f4e47b8ce/FLAG32200d421 [2018-10-27 06:18:20,296 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e8ebb9b8/1c199b0ea10e4e7d83873d8f4e47b8ce [2018-10-27 06:18:20,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:18:20,309 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 06:18:20,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:18:20,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:18:20,314 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:18:20,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:18:20" (1/1) ... [2018-10-27 06:18:20,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72cfc8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:20, skipping insertion in model container [2018-10-27 06:18:20,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:18:20" (1/1) ... [2018-10-27 06:18:20,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:18:20,432 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:18:21,099 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:18:21,106 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:18:21,345 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:18:21,370 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:18:21,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21 WrapperNode [2018-10-27 06:18:21,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:18:21,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:18:21,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:18:21,373 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:18:21,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:18:21,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:18:21,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:18:21,691 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:18:21,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (1/1) ... [2018-10-27 06:18:21,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:18:21,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:18:21,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:18:21,795 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:18:21,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (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 06:18:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 06:18:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 06:18:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 06:18:21,868 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 06:18:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:18:21,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:18:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 06:18:21,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 06:18:26,990 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:18:26,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:18:26 BoogieIcfgContainer [2018-10-27 06:18:26,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:18:26,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 06:18:26,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 06:18:26,996 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 06:18:26,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:18:20" (1/3) ... [2018-10-27 06:18:26,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc8aeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:18:26, skipping insertion in model container [2018-10-27 06:18:26,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:18:21" (2/3) ... [2018-10-27 06:18:26,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc8aeb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:18:26, skipping insertion in model container [2018-10-27 06:18:26,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:18:26" (3/3) ... [2018-10-27 06:18:27,000 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label16_true-unreach-call.c [2018-10-27 06:18:27,011 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 06:18:27,020 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 06:18:27,039 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 06:18:27,081 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 06:18:27,081 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 06:18:27,081 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 06:18:27,081 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:18:27,081 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:18:27,082 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 06:18:27,082 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:18:27,082 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 06:18:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 06:18:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-27 06:18:27,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:18:27,132 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] [2018-10-27 06:18:27,134 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:18:27,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1790401401, now seen corresponding path program 1 times [2018-10-27 06:18:27,144 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:18:27,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:27,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:27,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:27,206 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:18:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:28,195 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 06:18:28,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:18:28,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:18:28,198 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:18:28,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:18:28,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:18:28,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:18:28,230 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 06:18:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:18:30,308 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-10-27 06:18:30,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:18:30,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2018-10-27 06:18:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:18:30,333 INFO L225 Difference]: With dead ends: 848 [2018-10-27 06:18:30,334 INFO L226 Difference]: Without dead ends: 534 [2018-10-27 06:18:30,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:18:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-10-27 06:18:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-10-27 06:18:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-10-27 06:18:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-10-27 06:18:30,444 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 172 [2018-10-27 06:18:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:18:30,446 INFO L481 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-10-27 06:18:30,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:18:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-10-27 06:18:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-27 06:18:30,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:18:30,455 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] [2018-10-27 06:18:30,455 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:18:30,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1193307901, now seen corresponding path program 1 times [2018-10-27 06:18:30,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:18:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:30,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:30,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:30,458 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:18:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:31,048 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 06:18:31,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:18:31,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:18:31,049 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:18:31,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:18:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:18:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:18:31,052 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-10-27 06:18:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:18:32,969 INFO L93 Difference]: Finished difference Result 1494 states and 2513 transitions. [2018-10-27 06:18:32,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:18:32,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2018-10-27 06:18:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:18:32,981 INFO L225 Difference]: With dead ends: 1494 [2018-10-27 06:18:32,981 INFO L226 Difference]: Without dead ends: 968 [2018-10-27 06:18:32,987 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 06:18:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2018-10-27 06:18:33,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 952. [2018-10-27 06:18:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-10-27 06:18:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1529 transitions. [2018-10-27 06:18:33,037 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1529 transitions. Word has length 185 [2018-10-27 06:18:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:18:33,038 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1529 transitions. [2018-10-27 06:18:33,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:18:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1529 transitions. [2018-10-27 06:18:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-27 06:18:33,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:18:33,052 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 06:18:33,053 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:18:33,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash 501674269, now seen corresponding path program 1 times [2018-10-27 06:18:33,054 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:18:33,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:33,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:33,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:33,056 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:18:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:18:33,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:33,576 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:18:33,577 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 197 with the following transitions: [2018-10-27 06:18:33,582 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [28], [29], [33], [37], [41], [45], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:18:33,664 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:18:33,665 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:18:34,801 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:18:34,803 INFO L272 AbstractInterpreter]: Visited 173 different actions 173 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 06:18:34,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:34,849 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:18:35,848 INFO L227 lantSequenceWeakener]: Weakened 187 states. On average, predicates are now at 71.98% of their original sizes. [2018-10-27 06:18:35,848 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:18:36,926 INFO L415 sIntCurrentIteration]: We unified 195 AI predicates to 195 [2018-10-27 06:18:36,926 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:18:36,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:18:36,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-10-27 06:18:36,929 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:18:36,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 06:18:36,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 06:18:36,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-27 06:18:36,931 INFO L87 Difference]: Start difference. First operand 952 states and 1529 transitions. Second operand 13 states. [2018-10-27 06:19:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:19:07,872 INFO L93 Difference]: Finished difference Result 2108 states and 3387 transitions. [2018-10-27 06:19:07,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:19:07,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 196 [2018-10-27 06:19:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:19:07,880 INFO L225 Difference]: With dead ends: 2108 [2018-10-27 06:19:07,880 INFO L226 Difference]: Without dead ends: 1162 [2018-10-27 06:19:07,884 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 196 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:19:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2018-10-27 06:19:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2018-10-27 06:19:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2018-10-27 06:19:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1747 transitions. [2018-10-27 06:19:07,919 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1747 transitions. Word has length 196 [2018-10-27 06:19:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:19:07,920 INFO L481 AbstractCegarLoop]: Abstraction has 1160 states and 1747 transitions. [2018-10-27 06:19:07,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 06:19:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1747 transitions. [2018-10-27 06:19:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-27 06:19:07,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:19:07,926 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:19:07,926 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:19:07,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:19:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1911484622, now seen corresponding path program 1 times [2018-10-27 06:19:07,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:19:07,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:19:07,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:19:07,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:19:07,929 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:19:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:19:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:19:08,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:19:08,455 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:19:08,455 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 206 with the following transitions: [2018-10-27 06:19:08,457 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [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], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:19:08,476 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:19:08,476 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:19:09,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:19:09,355 INFO L272 AbstractInterpreter]: Visited 177 different actions 352 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 06:19:09,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:19:09,366 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:19:09,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:19:09,366 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 06:19:09,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:19:09,387 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:19:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:19:09,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:19:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:19:10,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:19:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:19:11,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:19:11,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-10-27 06:19:11,002 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:19:11,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 06:19:11,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:19:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-10-27 06:19:11,004 INFO L87 Difference]: Start difference. First operand 1160 states and 1747 transitions. Second operand 9 states. [2018-10-27 06:19:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:19:22,252 INFO L93 Difference]: Finished difference Result 9426 states and 19261 transitions. [2018-10-27 06:19:22,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-27 06:19:22,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 205 [2018-10-27 06:19:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:19:22,361 INFO L225 Difference]: With dead ends: 9426 [2018-10-27 06:19:22,361 INFO L226 Difference]: Without dead ends: 8480 [2018-10-27 06:19:22,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-10-27 06:19:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8480 states. [2018-10-27 06:19:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8480 to 8113. [2018-10-27 06:19:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8113 states. [2018-10-27 06:19:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8113 states to 8113 states and 12545 transitions. [2018-10-27 06:19:22,780 INFO L78 Accepts]: Start accepts. Automaton has 8113 states and 12545 transitions. Word has length 205 [2018-10-27 06:19:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:19:22,780 INFO L481 AbstractCegarLoop]: Abstraction has 8113 states and 12545 transitions. [2018-10-27 06:19:22,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 06:19:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8113 states and 12545 transitions. [2018-10-27 06:19:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-27 06:19:22,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:19:22,826 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:19:22,827 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:19:22,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:19:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1256463911, now seen corresponding path program 1 times [2018-10-27 06:19:22,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:19:22,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:19:22,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:19:22,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:19:22,829 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:19:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:19:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:19:23,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:19:23,333 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:19:23,333 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-10-27 06:19:23,334 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [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], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:19:23,354 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:19:23,354 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:19:24,270 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:19:24,271 INFO L272 AbstractInterpreter]: Visited 176 different actions 346 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:19:24,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:19:24,300 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:19:25,130 INFO L227 lantSequenceWeakener]: Weakened 216 states. On average, predicates are now at 72.25% of their original sizes. [2018-10-27 06:19:25,131 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:19:27,132 INFO L415 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2018-10-27 06:19:27,132 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:19:27,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:19:27,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-10-27 06:19:27,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:19:27,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 06:19:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 06:19:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-10-27 06:19:27,135 INFO L87 Difference]: Start difference. First operand 8113 states and 12545 transitions. Second operand 20 states. [2018-10-27 06:19:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:19:57,862 INFO L93 Difference]: Finished difference Result 16176 states and 24700 transitions. [2018-10-27 06:19:57,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 06:19:57,862 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 219 [2018-10-27 06:19:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:19:57,911 INFO L225 Difference]: With dead ends: 16176 [2018-10-27 06:19:57,912 INFO L226 Difference]: Without dead ends: 8277 [2018-10-27 06:19:57,951 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 227 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2018-10-27 06:19:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2018-10-27 06:19:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8274. [2018-10-27 06:19:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2018-10-27 06:19:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12224 transitions. [2018-10-27 06:19:58,172 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12224 transitions. Word has length 219 [2018-10-27 06:19:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:19:58,173 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12224 transitions. [2018-10-27 06:19:58,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-27 06:19:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12224 transitions. [2018-10-27 06:19:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-27 06:19:58,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:19:58,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:19:58,195 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:19:58,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:19:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2003600888, now seen corresponding path program 1 times [2018-10-27 06:19:58,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:19:58,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:19:58,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:19:58,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:19:58,197 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:19:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:19:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:19:58,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:19:58,678 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:19:58,679 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-10-27 06:19:58,679 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:19:58,686 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:19:58,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:19:59,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:19:59,266 INFO L272 AbstractInterpreter]: Visited 177 different actions 346 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 06:19:59,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:19:59,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:19:59,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:19:59,274 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 06:19:59,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:19:59,285 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:19:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:19:59,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:19:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 06:19:59,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:19:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 06:19:59,773 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:19:59,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 06:19:59,773 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:19:59,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:19:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:19:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:19:59,775 INFO L87 Difference]: Start difference. First operand 8274 states and 12224 transitions. Second operand 3 states. [2018-10-27 06:20:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:20:01,476 INFO L93 Difference]: Finished difference Result 23168 states and 35721 transitions. [2018-10-27 06:20:01,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:20:01,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2018-10-27 06:20:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:20:01,561 INFO L225 Difference]: With dead ends: 23168 [2018-10-27 06:20:01,561 INFO L226 Difference]: Without dead ends: 15108 [2018-10-27 06:20:01,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 436 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:20:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2018-10-27 06:20:02,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 15080. [2018-10-27 06:20:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15080 states. [2018-10-27 06:20:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15080 states to 15080 states and 22901 transitions. [2018-10-27 06:20:02,422 INFO L78 Accepts]: Start accepts. Automaton has 15080 states and 22901 transitions. Word has length 219 [2018-10-27 06:20:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:20:02,423 INFO L481 AbstractCegarLoop]: Abstraction has 15080 states and 22901 transitions. [2018-10-27 06:20:02,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:20:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 15080 states and 22901 transitions. [2018-10-27 06:20:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-27 06:20:02,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:20:02,462 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:20:02,462 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:20:02,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash -713146558, now seen corresponding path program 1 times [2018-10-27 06:20:02,463 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:20:02,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:02,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:02,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:02,464 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:20:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:20:03,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:03,001 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:20:03,002 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2018-10-27 06:20:03,002 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:20:03,007 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:20:03,008 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:20:03,852 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:20:03,852 INFO L272 AbstractInterpreter]: Visited 178 different actions 354 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 06:20:03,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:03,888 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:20:03,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:03,888 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 06:20:03,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:03,903 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:20:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:04,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:20:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-27 06:20:04,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:20:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-27 06:20:04,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:20:04,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-10-27 06:20:04,790 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:20:04,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 06:20:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 06:20:04,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:20:04,792 INFO L87 Difference]: Start difference. First operand 15080 states and 22901 transitions. Second operand 8 states. [2018-10-27 06:20:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:20:07,300 INFO L93 Difference]: Finished difference Result 28374 states and 43436 transitions. [2018-10-27 06:20:07,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 06:20:07,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 230 [2018-10-27 06:20:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:20:07,358 INFO L225 Difference]: With dead ends: 28374 [2018-10-27 06:20:07,358 INFO L226 Difference]: Without dead ends: 14797 [2018-10-27 06:20:07,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 459 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-10-27 06:20:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14797 states. [2018-10-27 06:20:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14797 to 14790. [2018-10-27 06:20:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14790 states. [2018-10-27 06:20:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14790 states to 14790 states and 20716 transitions. [2018-10-27 06:20:07,725 INFO L78 Accepts]: Start accepts. Automaton has 14790 states and 20716 transitions. Word has length 230 [2018-10-27 06:20:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:20:07,725 INFO L481 AbstractCegarLoop]: Abstraction has 14790 states and 20716 transitions. [2018-10-27 06:20:07,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 06:20:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 14790 states and 20716 transitions. [2018-10-27 06:20:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-27 06:20:07,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:20:07,770 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:20:07,770 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:20:07,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:07,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1891198623, now seen corresponding path program 1 times [2018-10-27 06:20:07,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:20:07,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:07,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:07,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:07,772 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:20:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:20:08,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:20:08,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:20:08,092 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:20:08,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:20:08,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:20:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:20:08,093 INFO L87 Difference]: Start difference. First operand 14790 states and 20716 transitions. Second operand 3 states. [2018-10-27 06:20:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:20:10,020 INFO L93 Difference]: Finished difference Result 41374 states and 59939 transitions. [2018-10-27 06:20:10,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:20:10,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2018-10-27 06:20:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:20:10,154 INFO L225 Difference]: With dead ends: 41374 [2018-10-27 06:20:10,154 INFO L226 Difference]: Without dead ends: 27009 [2018-10-27 06:20:10,207 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 06:20:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27009 states. [2018-10-27 06:20:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27009 to 27006. [2018-10-27 06:20:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27006 states. [2018-10-27 06:20:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27006 states to 27006 states and 36805 transitions. [2018-10-27 06:20:10,859 INFO L78 Accepts]: Start accepts. Automaton has 27006 states and 36805 transitions. Word has length 273 [2018-10-27 06:20:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:20:10,860 INFO L481 AbstractCegarLoop]: Abstraction has 27006 states and 36805 transitions. [2018-10-27 06:20:10,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:20:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 27006 states and 36805 transitions. [2018-10-27 06:20:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-27 06:20:10,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:20:10,921 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] [2018-10-27 06:20:10,921 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:20:10,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2086891100, now seen corresponding path program 1 times [2018-10-27 06:20:10,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:20:10,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:10,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:10,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:10,923 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:20:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:11,536 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 06:20:11,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:11,536 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:20:11,536 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 309 with the following transitions: [2018-10-27 06:20:11,537 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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:20:11,541 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:20:11,542 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:20:12,310 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:20:12,310 INFO L272 AbstractInterpreter]: Visited 176 different actions 346 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:20:12,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:12,323 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:20:13,187 INFO L227 lantSequenceWeakener]: Weakened 305 states. On average, predicates are now at 72.64% of their original sizes. [2018-10-27 06:20:13,187 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:20:13,449 INFO L415 sIntCurrentIteration]: We unified 307 AI predicates to 307 [2018-10-27 06:20:13,450 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:20:13,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:20:13,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-10-27 06:20:13,450 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:20:13,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-27 06:20:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-27 06:20:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-10-27 06:20:13,452 INFO L87 Difference]: Start difference. First operand 27006 states and 36805 transitions. Second operand 18 states. [2018-10-27 06:20:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:20:27,675 INFO L93 Difference]: Finished difference Result 57605 states and 79624 transitions. [2018-10-27 06:20:27,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 06:20:27,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 308 [2018-10-27 06:20:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:20:27,778 INFO L225 Difference]: With dead ends: 57605 [2018-10-27 06:20:27,778 INFO L226 Difference]: Without dead ends: 31024 [2018-10-27 06:20:27,833 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 315 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-10-27 06:20:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2018-10-27 06:20:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 31021. [2018-10-27 06:20:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31021 states. [2018-10-27 06:20:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31021 states to 31021 states and 41594 transitions. [2018-10-27 06:20:28,435 INFO L78 Accepts]: Start accepts. Automaton has 31021 states and 41594 transitions. Word has length 308 [2018-10-27 06:20:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:20:28,435 INFO L481 AbstractCegarLoop]: Abstraction has 31021 states and 41594 transitions. [2018-10-27 06:20:28,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-27 06:20:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 31021 states and 41594 transitions. [2018-10-27 06:20:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-10-27 06:20:28,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:20:28,486 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 06:20:28,487 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:20:28,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:28,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1070910791, now seen corresponding path program 1 times [2018-10-27 06:20:28,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:20:28,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:28,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:28,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:28,488 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:20:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 213 proven. 34 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-27 06:20:29,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:29,093 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:20:29,094 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 332 with the following transitions: [2018-10-27 06:20:29,094 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], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [213], [216], [220], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:20:29,099 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:20:29,099 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:20:30,248 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:20:30,248 INFO L272 AbstractInterpreter]: Visited 180 different actions 531 times. Merged at 7 different actions 15 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 06:20:30,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:30,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:20:30,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:30,274 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 06:20:30,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:30,286 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:20:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:30,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:20:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 271 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-10-27 06:20:31,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:20:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 271 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-10-27 06:20:31,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:20:31,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 06:20:31,607 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:20:31,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 06:20:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:20:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-27 06:20:31,609 INFO L87 Difference]: Start difference. First operand 31021 states and 41594 transitions. Second operand 9 states. [2018-10-27 06:20:37,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:20:37,154 INFO L93 Difference]: Finished difference Result 70389 states and 99654 transitions. [2018-10-27 06:20:37,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-27 06:20:37,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 331 [2018-10-27 06:20:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:20:37,325 INFO L225 Difference]: With dead ends: 70389 [2018-10-27 06:20:37,326 INFO L226 Difference]: Without dead ends: 40003 [2018-10-27 06:20:37,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 677 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2018-10-27 06:20:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40003 states. [2018-10-27 06:20:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40003 to 38443. [2018-10-27 06:20:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38443 states. [2018-10-27 06:20:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38443 states to 38443 states and 46275 transitions. [2018-10-27 06:20:38,338 INFO L78 Accepts]: Start accepts. Automaton has 38443 states and 46275 transitions. Word has length 331 [2018-10-27 06:20:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:20:38,339 INFO L481 AbstractCegarLoop]: Abstraction has 38443 states and 46275 transitions. [2018-10-27 06:20:38,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 06:20:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38443 states and 46275 transitions. [2018-10-27 06:20:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-27 06:20:38,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:20:38,384 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 06:20:38,384 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:20:38,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash 627658605, now seen corresponding path program 1 times [2018-10-27 06:20:38,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:20:38,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:38,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:38,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:38,386 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:20:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 06:20:39,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:39,040 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:20:39,040 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-10-27 06:20:39,040 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], [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], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:20:39,045 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:20:39,045 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:20:40,271 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:20:40,271 INFO L272 AbstractInterpreter]: Visited 178 different actions 526 times. Merged at 7 different actions 15 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 06:20:40,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:40,279 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:20:40,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:40,279 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 06:20:40,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:40,286 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:20:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:40,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:20:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 06:20:41,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:20:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 06:20:41,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:20:41,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 06:20:41,489 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:20:41,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 06:20:41,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:20:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:20:41,490 INFO L87 Difference]: Start difference. First operand 38443 states and 46275 transitions. Second operand 9 states. [2018-10-27 06:20:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:20:49,706 INFO L93 Difference]: Finished difference Result 123433 states and 160483 transitions. [2018-10-27 06:20:49,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-27 06:20:49,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2018-10-27 06:20:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:20:50,069 INFO L225 Difference]: With dead ends: 123433 [2018-10-27 06:20:50,069 INFO L226 Difference]: Without dead ends: 86552 [2018-10-27 06:20:50,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 748 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=385, Invalid=1507, Unknown=0, NotChecked=0, Total=1892 [2018-10-27 06:20:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86552 states. [2018-10-27 06:20:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86552 to 84145. [2018-10-27 06:20:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84145 states. [2018-10-27 06:20:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84145 states to 84145 states and 100035 transitions. [2018-10-27 06:20:52,150 INFO L78 Accepts]: Start accepts. Automaton has 84145 states and 100035 transitions. Word has length 360 [2018-10-27 06:20:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:20:52,151 INFO L481 AbstractCegarLoop]: Abstraction has 84145 states and 100035 transitions. [2018-10-27 06:20:52,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 06:20:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 84145 states and 100035 transitions. [2018-10-27 06:20:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-10-27 06:20:52,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:20:52,238 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:20:52,238 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:20:52,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 28385607, now seen corresponding path program 1 times [2018-10-27 06:20:52,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:20:52,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:52,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:20:52,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:20:52,240 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:20:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:20:52,682 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 06:20:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 215 proven. 97 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-10-27 06:20:52,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:20:52,885 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:20:52,885 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 401 with the following transitions: [2018-10-27 06:20:52,886 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [111], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [213], [216], [220], [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], [543], [548], [550], [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], [837], [839], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:20:52,891 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:20:52,891 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:20:54,061 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:20:54,061 INFO L272 AbstractInterpreter]: Visited 181 different actions 719 times. Merged at 8 different actions 33 times. Widened at 1 different actions 1 times. Found 6 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:20:54,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:20:54,067 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:20:55,068 INFO L227 lantSequenceWeakener]: Weakened 396 states. On average, predicates are now at 73.77% of their original sizes. [2018-10-27 06:20:55,068 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:20:55,837 INFO L415 sIntCurrentIteration]: We unified 399 AI predicates to 399 [2018-10-27 06:20:55,838 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:20:55,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:20:55,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [9] total 31 [2018-10-27 06:20:55,838 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:20:55,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-27 06:20:55,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-27 06:20:55,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-10-27 06:20:55,839 INFO L87 Difference]: Start difference. First operand 84145 states and 100035 transitions. Second operand 24 states. [2018-10-27 06:21:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:21:53,771 INFO L93 Difference]: Finished difference Result 261381 states and 314595 transitions. [2018-10-27 06:21:53,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-27 06:21:53,772 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 400 [2018-10-27 06:21:53,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:21:53,772 INFO L225 Difference]: With dead ends: 261381 [2018-10-27 06:21:53,772 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 06:21:54,089 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 427 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=558, Invalid=2094, Unknown=0, NotChecked=0, Total=2652 [2018-10-27 06:21:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 06:21:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 06:21:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 06:21:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 06:21:54,091 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 400 [2018-10-27 06:21:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:21:54,092 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:21:54,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-27 06:21:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 06:21:54,092 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 06:21:54,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 06:21:57,000 WARN L179 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-10-27 06:21:59,009 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,056 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,060 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,063 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,432 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,444 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,465 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,466 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,544 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,560 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,569 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,645 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,827 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,901 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:21:59,987 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,106 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,108 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,202 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,268 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,374 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,695 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,799 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,899 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:00,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:01,008 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:01,024 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:01,039 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:01,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:01,326 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 06:22:01,486 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-10-27 06:22:01,563 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-27 06:22:01,565 INFO L168 Benchmark]: Toolchain (without parser) took 221256.29 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 773.3 MB in the end (delta: 645.3 MB). Peak memory consumption was 3.7 GB. Max. memory is 7.1 GB. [2018-10-27 06:22:01,566 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 06:22:01,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1061.94 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-27 06:22:01,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 317.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -858.6 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-27 06:22:01,570 INFO L168 Benchmark]: Boogie Preprocessor took 104.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2018-10-27 06:22:01,571 INFO L168 Benchmark]: RCFGBuilder took 5196.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 247.0 MB). Peak memory consumption was 247.0 MB. Max. memory is 7.1 GB. [2018-10-27 06:22:01,572 INFO L168 Benchmark]: TraceAbstraction took 214571.33 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 773.3 MB in the end (delta: 1.2 GB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. [2018-10-27 06:22:01,580 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1061.94 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 317.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -858.6 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5196.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 247.0 MB). Peak memory consumption was 247.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214571.33 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 773.3 MB in the end (delta: 1.2 GB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1530]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 2321. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown