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_label57_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:24:34,496 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:24:34,501 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:24:34,513 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:24:34,513 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:24:34,514 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:24:34,516 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:24:34,517 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:24:34,519 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:24:34,520 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:24:34,521 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:24:34,521 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:24:34,522 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:24:34,523 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:24:34,524 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:24:34,525 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:24:34,526 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:24:34,528 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:24:34,535 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:24:34,537 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:24:34,538 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:24:34,542 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:24:34,548 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:24:34,548 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:24:34,549 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:24:34,549 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:24:34,550 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:24:34,554 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:24:34,555 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:24:34,559 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:24:34,559 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:24:34,559 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:24:34,561 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:24:34,561 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:24:34,562 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:24:34,564 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:24:34,564 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 06:24:34,593 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:24:34,594 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:24:34,595 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 06:24:34,598 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 06:24:34,599 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 06:24:34,599 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 06:24:34,599 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 06:24:34,599 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 06:24:34,599 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 06:24:34,600 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 06:24:34,600 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 06:24:34,600 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 06:24:34,600 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 06:24:34,601 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 06:24:34,601 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:24:34,602 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:24:34,602 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:24:34,602 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 06:24:34,602 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 06:24:34,602 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 06:24:34,602 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:24:34,604 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 06:24:34,605 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:24:34,605 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:24:34,605 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 06:24:34,605 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 06:24:34,605 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 06:24:34,606 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:24:34,606 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 06:24:34,606 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 06:24:34,606 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 06:24:34,606 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 06:24:34,607 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 06:24:34,607 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 06:24:34,607 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 06:24:34,607 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 06:24:34,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:24:34,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:24:34,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:24:34,673 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:24:34,673 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:24:34,674 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label57_true-unreach-call.c [2018-10-27 06:24:34,726 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5935b9077/9e82544383274121a172d5b31bcc38a9/FLAGfd63ad263 [2018-10-27 06:24:35,349 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:24:35,350 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label57_true-unreach-call.c [2018-10-27 06:24:35,372 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5935b9077/9e82544383274121a172d5b31bcc38a9/FLAGfd63ad263 [2018-10-27 06:24:35,393 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5935b9077/9e82544383274121a172d5b31bcc38a9 [2018-10-27 06:24:35,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:24:35,408 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 06:24:35,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:24:35,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:24:35,413 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:24:35,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:24:35" (1/1) ... [2018-10-27 06:24:35,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b8a232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:35, skipping insertion in model container [2018-10-27 06:24:35,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:24:35" (1/1) ... [2018-10-27 06:24:35,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:24:35,511 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:24:36,149 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:24:36,156 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:24:36,519 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:24:36,545 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:24:36,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36 WrapperNode [2018-10-27 06:24:36,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:24:36,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:24:36,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:24:36,547 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:24:36,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:36,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:36,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:24:36,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:24:36,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:24:36,863 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:24:36,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:36,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:36,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:36,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:36,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:36,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:37,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (1/1) ... [2018-10-27 06:24:37,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:24:37,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:24:37,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:24:37,018 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:24:37,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (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 06:24:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 06:24:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 06:24:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 06:24:37,086 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 06:24:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:24:37,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:24:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 06:24:37,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 06:24:41,896 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:24:41,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:24:41 BoogieIcfgContainer [2018-10-27 06:24:41,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:24:41,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 06:24:41,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 06:24:41,902 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 06:24:41,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:24:35" (1/3) ... [2018-10-27 06:24:41,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b27edb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:24:41, skipping insertion in model container [2018-10-27 06:24:41,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:24:36" (2/3) ... [2018-10-27 06:24:41,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b27edb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:24:41, skipping insertion in model container [2018-10-27 06:24:41,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:24:41" (3/3) ... [2018-10-27 06:24:41,906 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label57_true-unreach-call.c [2018-10-27 06:24:41,916 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 06:24:41,924 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 06:24:41,942 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 06:24:41,986 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 06:24:41,987 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 06:24:41,987 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 06:24:41,987 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:24:41,987 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:24:41,987 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 06:24:41,987 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:24:41,987 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 06:24:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 06:24:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-27 06:24:42,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:42,048 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] [2018-10-27 06:24:42,050 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:42,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash 790095017, now seen corresponding path program 1 times [2018-10-27 06:24:42,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:42,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:42,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:42,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:42,106 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:42,936 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:24:43,154 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 06:24:43,157 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:43,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:24:43,157 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:43,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:24:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:24:43,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:43,184 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 06:24:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:45,211 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-10-27 06:24:45,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:24:45,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2018-10-27 06:24:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:45,239 INFO L225 Difference]: With dead ends: 844 [2018-10-27 06:24:45,240 INFO L226 Difference]: Without dead ends: 530 [2018-10-27 06:24:45,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-10-27 06:24:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-10-27 06:24:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-10-27 06:24:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-10-27 06:24:45,384 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 168 [2018-10-27 06:24:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:45,385 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-10-27 06:24:45,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:24:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-10-27 06:24:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-27 06:24:45,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:45,397 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] [2018-10-27 06:24:45,397 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:45,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash -553690579, now seen corresponding path program 1 times [2018-10-27 06:24:45,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:45,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:45,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:45,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:45,400 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:46,005 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 06:24:46,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:46,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:24:46,006 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:46,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:24:46,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:24:46,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:46,009 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-10-27 06:24:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:48,062 INFO L93 Difference]: Finished difference Result 1473 states and 2496 transitions. [2018-10-27 06:24:48,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:24:48,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2018-10-27 06:24:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:48,071 INFO L225 Difference]: With dead ends: 1473 [2018-10-27 06:24:48,072 INFO L226 Difference]: Without dead ends: 954 [2018-10-27 06:24:48,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:48,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-10-27 06:24:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 952. [2018-10-27 06:24:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-10-27 06:24:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1496 transitions. [2018-10-27 06:24:48,121 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1496 transitions. Word has length 181 [2018-10-27 06:24:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:48,122 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1496 transitions. [2018-10-27 06:24:48,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:24:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1496 transitions. [2018-10-27 06:24:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-27 06:24:48,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:48,127 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:24:48,128 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:48,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1994788873, now seen corresponding path program 1 times [2018-10-27 06:24:48,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:48,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:48,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:48,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:48,130 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:48,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:48,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:24:48,458 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:48,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:24:48,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:24:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:48,459 INFO L87 Difference]: Start difference. First operand 952 states and 1496 transitions. Second operand 3 states. [2018-10-27 06:24:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:51,535 INFO L93 Difference]: Finished difference Result 2749 states and 4435 transitions. [2018-10-27 06:24:51,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:24:51,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-10-27 06:24:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:51,560 INFO L225 Difference]: With dead ends: 2749 [2018-10-27 06:24:51,560 INFO L226 Difference]: Without dead ends: 1803 [2018-10-27 06:24:51,568 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 06:24:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2018-10-27 06:24:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1786. [2018-10-27 06:24:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2018-10-27 06:24:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2786 transitions. [2018-10-27 06:24:51,655 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2786 transitions. Word has length 183 [2018-10-27 06:24:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:51,656 INFO L481 AbstractCegarLoop]: Abstraction has 1786 states and 2786 transitions. [2018-10-27 06:24:51,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:24:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2786 transitions. [2018-10-27 06:24:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-27 06:24:51,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:51,664 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:24:51,664 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:51,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2119210880, now seen corresponding path program 1 times [2018-10-27 06:24:51,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:51,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:51,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:51,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:51,666 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:51,936 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 06:24:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:52,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:52,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 06:24:52,217 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:52,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 06:24:52,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:24:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:24:52,219 INFO L87 Difference]: Start difference. First operand 1786 states and 2786 transitions. Second operand 6 states. [2018-10-27 06:24:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:55,754 INFO L93 Difference]: Finished difference Result 5451 states and 9148 transitions. [2018-10-27 06:24:55,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 06:24:55,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2018-10-27 06:24:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:55,794 INFO L225 Difference]: With dead ends: 5451 [2018-10-27 06:24:55,794 INFO L226 Difference]: Without dead ends: 3671 [2018-10-27 06:24:55,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:24:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2018-10-27 06:24:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3579. [2018-10-27 06:24:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3579 states. [2018-10-27 06:24:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 5696 transitions. [2018-10-27 06:24:56,033 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 5696 transitions. Word has length 186 [2018-10-27 06:24:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:56,034 INFO L481 AbstractCegarLoop]: Abstraction has 3579 states and 5696 transitions. [2018-10-27 06:24:56,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 06:24:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 5696 transitions. [2018-10-27 06:24:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-27 06:24:56,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:56,047 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:24:56,047 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:56,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2107273996, now seen corresponding path program 1 times [2018-10-27 06:24:56,048 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:56,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:56,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:56,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:56,050 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:56,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:24:56,363 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:24:56,364 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 196 with the following transitions: [2018-10-27 06:24:56,366 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [36], [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], [805], [807], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:24:56,434 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:24:56,434 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:24:58,204 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:24:58,207 INFO L272 AbstractInterpreter]: Visited 172 different actions 338 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 06:24:58,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:58,255 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:24:59,276 INFO L227 lantSequenceWeakener]: Weakened 192 states. On average, predicates are now at 72.05% of their original sizes. [2018-10-27 06:24:59,277 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:25:00,426 INFO L415 sIntCurrentIteration]: We unified 194 AI predicates to 194 [2018-10-27 06:25:00,427 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:25:00,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:25:00,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [5] total 23 [2018-10-27 06:25:00,428 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:25:00,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 06:25:00,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 06:25:00,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2018-10-27 06:25:00,430 INFO L87 Difference]: Start difference. First operand 3579 states and 5696 transitions. Second operand 20 states. [2018-10-27 06:25:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:25:25,690 INFO L93 Difference]: Finished difference Result 7574 states and 12066 transitions. [2018-10-27 06:25:25,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 06:25:25,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2018-10-27 06:25:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:25:25,709 INFO L225 Difference]: With dead ends: 7574 [2018-10-27 06:25:25,710 INFO L226 Difference]: Without dead ends: 4001 [2018-10-27 06:25:25,722 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 202 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-10-27 06:25:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2018-10-27 06:25:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3998. [2018-10-27 06:25:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3998 states. [2018-10-27 06:25:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 6141 transitions. [2018-10-27 06:25:25,831 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 6141 transitions. Word has length 195 [2018-10-27 06:25:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:25:25,831 INFO L481 AbstractCegarLoop]: Abstraction has 3998 states and 6141 transitions. [2018-10-27 06:25:25,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-27 06:25:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 6141 transitions. [2018-10-27 06:25:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-27 06:25:25,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:25:25,845 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 06:25:25,846 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:25:25,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1111613903, now seen corresponding path program 1 times [2018-10-27 06:25:25,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:25:25,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:25,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:25:25,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:25,848 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:25:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:25:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:25:26,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:25:26,298 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:25:26,298 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-10-27 06:25:26,299 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [805], [807], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:25:26,312 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:25:26,313 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:25:27,042 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:25:27,043 INFO L272 AbstractInterpreter]: Visited 172 different actions 337 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 06:25:27,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:27,050 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:25:27,747 INFO L227 lantSequenceWeakener]: Weakened 205 states. On average, predicates are now at 74.01% of their original sizes. [2018-10-27 06:25:27,747 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:25:28,283 INFO L415 sIntCurrentIteration]: We unified 207 AI predicates to 207 [2018-10-27 06:25:28,283 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:25:28,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:25:28,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-10-27 06:25:28,284 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:25:28,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 06:25:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 06:25:28,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-10-27 06:25:28,286 INFO L87 Difference]: Start difference. First operand 3998 states and 6141 transitions. Second operand 17 states. [2018-10-27 06:26:06,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:26:06,727 INFO L93 Difference]: Finished difference Result 9693 states and 15360 transitions. [2018-10-27 06:26:06,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 06:26:06,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 208 [2018-10-27 06:26:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:26:06,758 INFO L225 Difference]: With dead ends: 9693 [2018-10-27 06:26:06,759 INFO L226 Difference]: Without dead ends: 6120 [2018-10-27 06:26:06,772 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 216 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2018-10-27 06:26:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6120 states. [2018-10-27 06:26:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6120 to 6112. [2018-10-27 06:26:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6112 states. [2018-10-27 06:26:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 9170 transitions. [2018-10-27 06:26:06,942 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 9170 transitions. Word has length 208 [2018-10-27 06:26:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:26:06,942 INFO L481 AbstractCegarLoop]: Abstraction has 6112 states and 9170 transitions. [2018-10-27 06:26:06,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 06:26:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 9170 transitions. [2018-10-27 06:26:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-27 06:26:06,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:26:06,962 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:26:06,962 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:26:06,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1183571648, now seen corresponding path program 1 times [2018-10-27 06:26:06,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:26:06,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:06,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:06,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:06,965 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:26:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-27 06:26:07,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:07,498 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:26:07,498 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 213 with the following transitions: [2018-10-27 06:26:07,499 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [28], [29], [33], [37], [41], [45], [49], [52], [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], [805], [807], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:26:07,508 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:26:07,508 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:26:08,315 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:26:08,316 INFO L272 AbstractInterpreter]: Visited 174 different actions 516 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:26:08,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:08,325 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:26:08,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:08,325 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 06:26:08,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:08,334 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:26:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:08,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:26:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-27 06:26:08,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:26:09,023 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-27 06:26:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-27 06:26:09,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:26:09,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 06:26:09,302 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:26:09,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:26:09,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:26:09,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:26:09,303 INFO L87 Difference]: Start difference. First operand 6112 states and 9170 transitions. Second operand 12 states. [2018-10-27 06:26:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:26:21,807 INFO L93 Difference]: Finished difference Result 55978 states and 97116 transitions. [2018-10-27 06:26:21,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-27 06:26:21,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 212 [2018-10-27 06:26:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:26:22,115 INFO L225 Difference]: With dead ends: 55978 [2018-10-27 06:26:22,116 INFO L226 Difference]: Without dead ends: 50712 [2018-10-27 06:26:22,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 438 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=859, Invalid=3971, Unknown=0, NotChecked=0, Total=4830 [2018-10-27 06:26:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50712 states. [2018-10-27 06:26:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50712 to 50518. [2018-10-27 06:26:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50518 states. [2018-10-27 06:26:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50518 states to 50518 states and 84292 transitions. [2018-10-27 06:26:23,878 INFO L78 Accepts]: Start accepts. Automaton has 50518 states and 84292 transitions. Word has length 212 [2018-10-27 06:26:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:26:23,878 INFO L481 AbstractCegarLoop]: Abstraction has 50518 states and 84292 transitions. [2018-10-27 06:26:23,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:26:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 50518 states and 84292 transitions. [2018-10-27 06:26:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-27 06:26:24,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:26:24,005 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2018-10-27 06:26:24,005 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:26:24,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1814692057, now seen corresponding path program 1 times [2018-10-27 06:26:24,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:26:24,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:24,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:24,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:24,007 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:26:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:25,058 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 06:26:25,469 WARN L179 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-27 06:26:25,958 WARN L179 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 06:26:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 81 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 06:26:26,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:26,233 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:26:26,234 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2018-10-27 06:26:26,235 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [28], [29], [33], [37], [41], [44], [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], [805], [807], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:26:26,241 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:26:26,241 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:26:27,382 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:26:27,382 INFO L272 AbstractInterpreter]: Visited 174 different actions 516 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:26:27,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:27,387 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:26:27,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:27,387 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 06:26:27,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:27,395 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:26:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:27,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:26:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-27 06:26:27,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:26:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-27 06:26:28,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:26:28,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2018-10-27 06:26:28,186 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:26:28,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 06:26:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 06:26:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-10-27 06:26:28,187 INFO L87 Difference]: Start difference. First operand 50518 states and 84292 transitions. Second operand 14 states. [2018-10-27 06:26:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:26:36,545 INFO L93 Difference]: Finished difference Result 202347 states and 414125 transitions. [2018-10-27 06:26:36,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-27 06:26:36,546 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 222 [2018-10-27 06:26:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:26:38,170 INFO L225 Difference]: With dead ends: 202347 [2018-10-27 06:26:38,170 INFO L226 Difference]: Without dead ends: 152687 [2018-10-27 06:26:38,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 462 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=356, Invalid=1126, Unknown=0, NotChecked=0, Total=1482 [2018-10-27 06:26:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152687 states. [2018-10-27 06:26:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152687 to 147348. [2018-10-27 06:26:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147348 states. [2018-10-27 06:26:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147348 states to 147348 states and 242898 transitions. [2018-10-27 06:26:44,057 INFO L78 Accepts]: Start accepts. Automaton has 147348 states and 242898 transitions. Word has length 222 [2018-10-27 06:26:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:26:44,057 INFO L481 AbstractCegarLoop]: Abstraction has 147348 states and 242898 transitions. [2018-10-27 06:26:44,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 06:26:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 147348 states and 242898 transitions. [2018-10-27 06:26:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-27 06:26:44,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:26:44,202 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:26:44,202 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:26:44,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:44,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1093098390, now seen corresponding path program 1 times [2018-10-27 06:26:44,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:26:44,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:44,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:44,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:44,204 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:26:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 113 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:26:45,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:45,189 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:26:45,189 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 244 with the following transitions: [2018-10-27 06:26:45,190 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [36], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [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], [805], [807], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:26:45,196 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:26:45,196 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:26:47,246 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:26:47,247 INFO L272 AbstractInterpreter]: Visited 174 different actions 697 times. Merged at 8 different actions 36 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:26:47,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:47,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:26:47,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:47,257 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 06:26:47,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:47,267 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:26:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:47,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:26:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-27 06:26:47,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:26:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-27 06:26:47,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:26:47,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 06:26:47,949 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:26:47,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:26:47,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:26:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:26:47,951 INFO L87 Difference]: Start difference. First operand 147348 states and 242898 transitions. Second operand 12 states. [2018-10-27 06:27:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:27:31,340 INFO L93 Difference]: Finished difference Result 1053038 states and 2193540 transitions. [2018-10-27 06:27:31,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-27 06:27:31,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 243 [2018-10-27 06:27:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:27:38,374 INFO L225 Difference]: With dead ends: 1053038 [2018-10-27 06:27:38,374 INFO L226 Difference]: Without dead ends: 906114 [2018-10-27 06:27:39,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 521 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=737, Invalid=3553, Unknown=0, NotChecked=0, Total=4290 [2018-10-27 06:27:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906114 states.