java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label42_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:13:47,490 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:13:47,497 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:13:47,517 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:13:47,517 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:13:47,519 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:13:47,520 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:13:47,525 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:13:47,529 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:13:47,530 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:13:47,532 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:13:47,532 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:13:47,533 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:13:47,535 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:13:47,543 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:13:47,545 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:13:47,549 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:13:47,550 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:13:47,554 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:13:47,556 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:13:47,558 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:13:47,560 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:13:47,566 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:13:47,566 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:13:47,567 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:13:47,568 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:13:47,569 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:13:47,570 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:13:47,573 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:13:47,574 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:13:47,574 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:13:47,575 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:13:47,575 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:13:47,575 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:13:47,576 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:13:47,579 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:13:47,579 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:13:47,601 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:13:47,601 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:13:47,602 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:13:47,602 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:13:47,602 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:13:47,605 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:13:47,605 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:13:47,605 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:13:47,605 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:13:47,605 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:13:47,606 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:13:47,606 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:13:47,606 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:13:47,607 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:13:47,607 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:13:47,607 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:13:47,607 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:13:47,608 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:13:47,609 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:13:47,609 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:13:47,609 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:13:47,609 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:13:47,610 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:13:47,610 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:13:47,610 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:13:47,610 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:13:47,610 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:13:47,611 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:13:47,611 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:13:47,611 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:13:47,611 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:13:47,611 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:13:47,612 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:13:47,673 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:13:47,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:13:47,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:13:47,700 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:13:47,701 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:13:47,701 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label42_true-unreach-call_false-termination.c [2018-09-14 16:13:48,046 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0356804c/7985df8a540c448a9f8b1c928630d6f0/FLAG77469ccf4 [2018-09-14 16:13:48,563 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:13:48,565 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label42_true-unreach-call_false-termination.c [2018-09-14 16:13:48,609 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0356804c/7985df8a540c448a9f8b1c928630d6f0/FLAG77469ccf4 [2018-09-14 16:13:48,631 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0356804c/7985df8a540c448a9f8b1c928630d6f0 [2018-09-14 16:13:48,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:13:48,651 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:13:48,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:13:48,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:13:48,664 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:13:48,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:13:48" (1/1) ... [2018-09-14 16:13:48,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ed525f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:48, skipping insertion in model container [2018-09-14 16:13:48,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:13:48" (1/1) ... [2018-09-14 16:13:48,682 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:13:50,090 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:13:50,109 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:13:50,868 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:13:51,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51 WrapperNode [2018-09-14 16:13:51,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:13:51,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:13:51,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:13:51,018 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:13:51,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:13:51,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:13:51,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:13:51,151 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:13:51,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... [2018-09-14 16:13:51,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:13:51,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:13:51,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:13:51,757 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:13:51,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:13:51,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:13:51,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:13:51,833 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-09-14 16:13:51,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-09-14 16:13:51,833 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-09-14 16:13:51,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-09-14 16:13:51,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 16:13:51,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 16:13:51,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:13:51,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:13:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:13:51,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:13:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:13:51,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:14:03,317 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:14:03,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:14:03 BoogieIcfgContainer [2018-09-14 16:14:03,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:14:03,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:14:03,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:14:03,325 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:14:03,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:13:48" (1/3) ... [2018-09-14 16:14:03,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d45dce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:14:03, skipping insertion in model container [2018-09-14 16:14:03,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:13:51" (2/3) ... [2018-09-14 16:14:03,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d45dce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:14:03, skipping insertion in model container [2018-09-14 16:14:03,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:14:03" (3/3) ... [2018-09-14 16:14:03,329 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label42_true-unreach-call_false-termination.c [2018-09-14 16:14:03,337 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:14:03,346 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:14:03,429 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:14:03,430 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:14:03,430 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:14:03,430 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:14:03,430 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:14:03,430 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:14:03,430 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:14:03,431 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:14:03,431 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:14:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states. [2018-09-14 16:14:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2018-09-14 16:14:03,550 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:03,552 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:14:03,553 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1999549575, now seen corresponding path program 1 times [2018-09-14 16:14:03,563 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:03,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:03,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:03,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:03,617 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:06,085 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:14:06,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:14:06,085 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:14:06,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:14:06,108 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:14:06,109 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:14:06,113 INFO L87 Difference]: Start difference. First operand 907 states. Second operand 3 states. [2018-09-14 16:14:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:14:12,835 INFO L93 Difference]: Finished difference Result 2647 states and 5102 transitions. [2018-09-14 16:14:12,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:14:12,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 827 [2018-09-14 16:14:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:14:12,879 INFO L225 Difference]: With dead ends: 2647 [2018-09-14 16:14:12,880 INFO L226 Difference]: Without dead ends: 1738 [2018-09-14 16:14:12,888 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:14:12,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2018-09-14 16:14:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1738. [2018-09-14 16:14:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2018-09-14 16:14:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3133 transitions. [2018-09-14 16:14:13,072 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3133 transitions. Word has length 827 [2018-09-14 16:14:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:14:13,077 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 3133 transitions. [2018-09-14 16:14:13,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:14:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3133 transitions. [2018-09-14 16:14:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-09-14 16:14:13,110 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:13,111 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:14:13,111 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1496303044, now seen corresponding path program 1 times [2018-09-14 16:14:13,113 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:13,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:13,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:13,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:13,115 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:13,463 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:14:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:13,870 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:14:13,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:14:13,870 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:14:13,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:14:13,873 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:14:13,873 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:14:13,874 INFO L87 Difference]: Start difference. First operand 1738 states and 3133 transitions. Second operand 6 states. [2018-09-14 16:14:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:14:23,834 INFO L93 Difference]: Finished difference Result 5285 states and 9647 transitions. [2018-09-14 16:14:23,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:14:23,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 843 [2018-09-14 16:14:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:14:23,863 INFO L225 Difference]: With dead ends: 5285 [2018-09-14 16:14:23,864 INFO L226 Difference]: Without dead ends: 3553 [2018-09-14 16:14:23,871 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:14:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2018-09-14 16:14:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3489. [2018-09-14 16:14:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3489 states. [2018-09-14 16:14:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 6194 transitions. [2018-09-14 16:14:24,025 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 6194 transitions. Word has length 843 [2018-09-14 16:14:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:14:24,025 INFO L480 AbstractCegarLoop]: Abstraction has 3489 states and 6194 transitions. [2018-09-14 16:14:24,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:14:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 6194 transitions. [2018-09-14 16:14:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2018-09-14 16:14:24,045 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:24,046 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:14:24,046 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1513525488, now seen corresponding path program 1 times [2018-09-14 16:14:24,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:24,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:24,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:24,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:24,049 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:24,381 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:14:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:24,802 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:14:24,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:14:24,802 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:14:24,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:14:24,804 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:14:24,804 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:14:24,805 INFO L87 Difference]: Start difference. First operand 3489 states and 6194 transitions. Second operand 6 states. [2018-09-14 16:14:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:14:31,520 INFO L93 Difference]: Finished difference Result 8886 states and 15694 transitions. [2018-09-14 16:14:31,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:14:31,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 856 [2018-09-14 16:14:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:14:31,549 INFO L225 Difference]: With dead ends: 8886 [2018-09-14 16:14:31,549 INFO L226 Difference]: Without dead ends: 5403 [2018-09-14 16:14:31,559 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:14:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2018-09-14 16:14:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 5372. [2018-09-14 16:14:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5372 states. [2018-09-14 16:14:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5372 states to 5372 states and 8379 transitions. [2018-09-14 16:14:31,682 INFO L78 Accepts]: Start accepts. Automaton has 5372 states and 8379 transitions. Word has length 856 [2018-09-14 16:14:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:14:31,683 INFO L480 AbstractCegarLoop]: Abstraction has 5372 states and 8379 transitions. [2018-09-14 16:14:31,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:14:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5372 states and 8379 transitions. [2018-09-14 16:14:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 864 [2018-09-14 16:14:31,704 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:31,705 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:14:31,705 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1436632313, now seen corresponding path program 1 times [2018-09-14 16:14:31,705 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:31,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:31,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:31,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:31,707 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:32,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:14:32,215 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:14:32,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:32,225 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:14:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:32,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:14:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:33,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:14:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:33,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:14:33,924 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:14:33,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:33,941 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:14:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:34,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:14:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:35,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:14:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:36,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:14:36,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-09-14 16:14:36,345 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:14:36,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:14:36,348 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:14:36,348 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:14:36,348 INFO L87 Difference]: Start difference. First operand 5372 states and 8379 transitions. Second operand 6 states. [2018-09-14 16:14:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:14:43,384 INFO L93 Difference]: Finished difference Result 16467 states and 26559 transitions. [2018-09-14 16:14:43,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:14:43,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 863 [2018-09-14 16:14:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:14:43,448 INFO L225 Difference]: With dead ends: 16467 [2018-09-14 16:14:43,448 INFO L226 Difference]: Without dead ends: 11101 [2018-09-14 16:14:43,468 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3460 GetRequests, 3442 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:14:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2018-09-14 16:14:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 11007. [2018-09-14 16:14:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11007 states. [2018-09-14 16:14:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 16715 transitions. [2018-09-14 16:14:43,799 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 16715 transitions. Word has length 863 [2018-09-14 16:14:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:14:43,800 INFO L480 AbstractCegarLoop]: Abstraction has 11007 states and 16715 transitions. [2018-09-14 16:14:43,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:14:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 16715 transitions. [2018-09-14 16:14:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2018-09-14 16:14:43,840 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:43,841 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:14:43,842 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1367677857, now seen corresponding path program 1 times [2018-09-14 16:14:43,842 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:43,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:43,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:43,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:43,844 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:44,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:14:44,639 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:14:44,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:44,657 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:14:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:44,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:14:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:45,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:14:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:46,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:14:46,065 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:14:46,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:46,082 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:14:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:46,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:14:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:14:47,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:14:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:14:47,817 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:14:47,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 15 [2018-09-14 16:14:47,818 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:14:47,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:14:47,819 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:14:47,820 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:14:47,820 INFO L87 Difference]: Start difference. First operand 11007 states and 16715 transitions. Second operand 5 states. [2018-09-14 16:14:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:14:54,432 INFO L93 Difference]: Finished difference Result 33216 states and 52402 transitions. [2018-09-14 16:14:54,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:14:54,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 870 [2018-09-14 16:14:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:14:54,554 INFO L225 Difference]: With dead ends: 33216 [2018-09-14 16:14:54,554 INFO L226 Difference]: Without dead ends: 22215 [2018-09-14 16:14:54,598 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3485 GetRequests, 3469 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:14:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22215 states. [2018-09-14 16:14:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22215 to 22213. [2018-09-14 16:14:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22213 states. [2018-09-14 16:14:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22213 states to 22213 states and 33868 transitions. [2018-09-14 16:14:55,136 INFO L78 Accepts]: Start accepts. Automaton has 22213 states and 33868 transitions. Word has length 870 [2018-09-14 16:14:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:14:55,137 INFO L480 AbstractCegarLoop]: Abstraction has 22213 states and 33868 transitions. [2018-09-14 16:14:55,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:14:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 22213 states and 33868 transitions. [2018-09-14 16:14:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2018-09-14 16:14:55,223 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:55,224 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:14:55,224 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:55,224 INFO L82 PathProgramCache]: Analyzing trace with hash 246963759, now seen corresponding path program 1 times [2018-09-14 16:14:55,225 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:55,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:55,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:55,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:55,226 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:55,634 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:14:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-09-14 16:14:56,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:14:56,745 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:14:56,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:56,759 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:14:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:57,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:14:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:57,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:14:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:58,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:14:58,134 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:14:58,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:58,150 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:14:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:58,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:14:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-14 16:14:59,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:14:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-14 16:14:59,671 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-14 16:14:59,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 13 [2018-09-14 16:14:59,673 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:14:59,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:14:59,674 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:14:59,674 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:14:59,675 INFO L87 Difference]: Start difference. First operand 22213 states and 33868 transitions. Second operand 5 states. [2018-09-14 16:15:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:15:06,387 INFO L93 Difference]: Finished difference Result 62618 states and 99699 transitions. [2018-09-14 16:15:06,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:15:06,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 917 [2018-09-14 16:15:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:15:06,573 INFO L225 Difference]: With dead ends: 62618 [2018-09-14 16:15:06,573 INFO L226 Difference]: Without dead ends: 40411 [2018-09-14 16:15:06,663 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3676 GetRequests, 3655 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:15:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40411 states. [2018-09-14 16:15:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40411 to 40231. [2018-09-14 16:15:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40231 states. [2018-09-14 16:15:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40231 states to 40231 states and 56121 transitions. [2018-09-14 16:15:07,616 INFO L78 Accepts]: Start accepts. Automaton has 40231 states and 56121 transitions. Word has length 917 [2018-09-14 16:15:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:15:07,617 INFO L480 AbstractCegarLoop]: Abstraction has 40231 states and 56121 transitions. [2018-09-14 16:15:07,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:15:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 40231 states and 56121 transitions. [2018-09-14 16:15:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2018-09-14 16:15:07,699 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:07,700 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:15:07,701 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1638818488, now seen corresponding path program 1 times [2018-09-14 16:15:07,701 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:07,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:07,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:07,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:07,703 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:15:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 182 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 16:15:08,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:08,991 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:15:09,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:09,009 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:09,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 16:15:10,014 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 182 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 16:15:10,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:10,626 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:15:10,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:10,644 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:11,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 16:15:12,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 182 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 16:15:12,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:15:12,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-14 16:15:12,625 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:15:12,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:15:12,627 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:15:12,627 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:15:12,627 INFO L87 Difference]: Start difference. First operand 40231 states and 56121 transitions. Second operand 9 states. [2018-09-14 16:15:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:15:25,505 INFO L93 Difference]: Finished difference Result 111901 states and 174940 transitions. [2018-09-14 16:15:25,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 16:15:25,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1006 [2018-09-14 16:15:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:15:25,856 INFO L225 Difference]: With dead ends: 111901 [2018-09-14 16:15:25,856 INFO L226 Difference]: Without dead ends: 71676 [2018-09-14 16:15:25,984 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4040 GetRequests, 4019 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:15:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71676 states. [2018-09-14 16:15:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71676 to 71280. [2018-09-14 16:15:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71280 states. [2018-09-14 16:15:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71280 states to 71280 states and 106082 transitions. [2018-09-14 16:15:27,926 INFO L78 Accepts]: Start accepts. Automaton has 71280 states and 106082 transitions. Word has length 1006 [2018-09-14 16:15:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:15:27,927 INFO L480 AbstractCegarLoop]: Abstraction has 71280 states and 106082 transitions. [2018-09-14 16:15:27,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:15:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 71280 states and 106082 transitions. [2018-09-14 16:15:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2018-09-14 16:15:28,089 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:28,090 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:15:28,090 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1237005611, now seen corresponding path program 1 times [2018-09-14 16:15:28,091 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:28,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:28,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:28,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:28,092 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:15:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:28,711 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:15:29,024 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 16:15:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 243 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:30,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:30,453 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:15:30,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:30,462 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:30,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:31,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:32,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:32,813 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:15:32,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:32,832 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:33,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-14 16:15:34,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (11)] Exception during sending of exit command (exit): Broken pipe [2018-09-14 16:15:35,080 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-14 16:15:35,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10, 5, 5] total 17 [2018-09-14 16:15:35,081 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:15:35,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:15:35,082 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:15:35,082 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:15:35,083 INFO L87 Difference]: Start difference. First operand 71280 states and 106082 transitions. Second operand 5 states. [2018-09-14 16:15:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:15:43,155 INFO L93 Difference]: Finished difference Result 173013 states and 269742 transitions. [2018-09-14 16:15:43,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:15:43,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1075 [2018-09-14 16:15:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:15:43,571 INFO L225 Difference]: With dead ends: 173013 [2018-09-14 16:15:43,571 INFO L226 Difference]: Without dead ends: 101739 [2018-09-14 16:15:43,677 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4310 GetRequests, 4284 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:15:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101739 states. [2018-09-14 16:15:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101739 to 101396. [2018-09-14 16:15:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101396 states. [2018-09-14 16:15:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101396 states to 101396 states and 148405 transitions. [2018-09-14 16:15:45,634 INFO L78 Accepts]: Start accepts. Automaton has 101396 states and 148405 transitions. Word has length 1075 [2018-09-14 16:15:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:15:45,635 INFO L480 AbstractCegarLoop]: Abstraction has 101396 states and 148405 transitions. [2018-09-14 16:15:45,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:15:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 101396 states and 148405 transitions. [2018-09-14 16:15:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2018-09-14 16:15:45,818 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:45,819 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:15:45,820 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1925093981, now seen corresponding path program 1 times [2018-09-14 16:15:45,820 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:45,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:45,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:45,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:45,822 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:15:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 256 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:47,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:47,748 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:15:47,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:47,763 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:48,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 256 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:48,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 256 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:49,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:49,336 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:15:49,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:49,352 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:50,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 243 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:51,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 256 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:52,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:15:52,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 13 [2018-09-14 16:15:52,144 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:15:52,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:15:52,146 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:15:52,146 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:15:52,146 INFO L87 Difference]: Start difference. First operand 101396 states and 148405 transitions. Second operand 7 states. [2018-09-14 16:16:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:00,910 INFO L93 Difference]: Finished difference Result 256334 states and 397299 transitions. [2018-09-14 16:16:00,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:16:00,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1078 [2018-09-14 16:16:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:01,498 INFO L225 Difference]: With dead ends: 256334 [2018-09-14 16:16:01,498 INFO L226 Difference]: Without dead ends: 154949 [2018-09-14 16:16:01,742 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4319 GetRequests, 4305 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:16:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154949 states. [2018-09-14 16:16:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154949 to 153063. [2018-09-14 16:16:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153063 states. [2018-09-14 16:16:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153063 states to 153063 states and 209873 transitions. [2018-09-14 16:16:04,852 INFO L78 Accepts]: Start accepts. Automaton has 153063 states and 209873 transitions. Word has length 1078 [2018-09-14 16:16:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:04,853 INFO L480 AbstractCegarLoop]: Abstraction has 153063 states and 209873 transitions. [2018-09-14 16:16:04,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:16:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 153063 states and 209873 transitions. [2018-09-14 16:16:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1181 [2018-09-14 16:16:05,055 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:05,055 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:16:05,056 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:05,056 INFO L82 PathProgramCache]: Analyzing trace with hash 646586829, now seen corresponding path program 1 times [2018-09-14 16:16:05,056 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:05,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:05,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:05,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:05,057 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:06,124 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 16:16:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:07,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:07,683 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:16:07,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:07,691 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:08,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:16:09,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:16:10,044 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:16:10,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:16:10,045 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:16:10,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:16:10,046 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:16:10,046 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:16:10,047 INFO L87 Difference]: Start difference. First operand 153063 states and 209873 transitions. Second operand 3 states. [2018-09-14 16:16:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:16,604 INFO L93 Difference]: Finished difference Result 305280 states and 418778 transitions. [2018-09-14 16:16:16,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:16:16,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1180 [2018-09-14 16:16:16,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:17,170 INFO L225 Difference]: With dead ends: 305280 [2018-09-14 16:16:17,171 INFO L226 Difference]: Without dead ends: 153058 [2018-09-14 16:16:17,446 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2367 GetRequests, 2356 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:16:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153058 states. [2018-09-14 16:16:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153058 to 151365. [2018-09-14 16:16:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151365 states. [2018-09-14 16:16:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151365 states to 151365 states and 198049 transitions. [2018-09-14 16:16:20,382 INFO L78 Accepts]: Start accepts. Automaton has 151365 states and 198049 transitions. Word has length 1180 [2018-09-14 16:16:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:20,383 INFO L480 AbstractCegarLoop]: Abstraction has 151365 states and 198049 transitions. [2018-09-14 16:16:20,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:16:20,384 INFO L276 IsEmpty]: Start isEmpty. Operand 151365 states and 198049 transitions. [2018-09-14 16:16:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1227 [2018-09-14 16:16:20,560 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:20,561 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:16:20,562 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1764914504, now seen corresponding path program 1 times [2018-09-14 16:16:20,562 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:20,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:20,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:20,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:20,563 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 408 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-14 16:16:22,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:22,763 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:16:22,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:22,772 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:23,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 423 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-14 16:16:28,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 408 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-14 16:16:29,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:29,361 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:16:29,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:29,378 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:30,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 423 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-14 16:16:30,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 408 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-14 16:16:31,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:16:31,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-14 16:16:31,971 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:16:31,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:16:31,973 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:16:31,973 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:16:31,973 INFO L87 Difference]: Start difference. First operand 151365 states and 198049 transitions. Second operand 9 states. [2018-09-14 16:16:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:42,916 INFO L93 Difference]: Finished difference Result 339502 states and 454433 transitions. [2018-09-14 16:16:42,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-14 16:16:42,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1226 [2018-09-14 16:16:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:43,615 INFO L225 Difference]: With dead ends: 339502 [2018-09-14 16:16:43,615 INFO L226 Difference]: Without dead ends: 173551 [2018-09-14 16:16:43,981 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4920 GetRequests, 4895 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:16:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173551 states. [2018-09-14 16:16:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173551 to 172058. [2018-09-14 16:16:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172058 states. [2018-09-14 16:16:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172058 states to 172058 states and 208016 transitions. [2018-09-14 16:16:47,425 INFO L78 Accepts]: Start accepts. Automaton has 172058 states and 208016 transitions. Word has length 1226 [2018-09-14 16:16:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:47,425 INFO L480 AbstractCegarLoop]: Abstraction has 172058 states and 208016 transitions. [2018-09-14 16:16:47,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:16:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 172058 states and 208016 transitions. [2018-09-14 16:16:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1269 [2018-09-14 16:16:47,522 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:47,523 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:16:47,523 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:47,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2041463050, now seen corresponding path program 1 times [2018-09-14 16:16:47,524 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:47,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:47,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:47,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:47,525 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 515 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:49,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:49,726 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:16:49,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:49,734 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:50,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-14 16:16:51,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-14 16:16:51,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:51,727 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:16:51,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:51,744 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:52,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-14 16:16:53,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-14 16:16:53,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:16:53,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 18 [2018-09-14 16:16:53,816 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:16:53,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 16:16:53,818 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 16:16:53,818 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:16:53,818 INFO L87 Difference]: Start difference. First operand 172058 states and 208016 transitions. Second operand 15 states. Received shutdown request... [2018-09-14 16:17:25,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-14 16:17:25,616 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:17:25,622 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:17:25,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:17:25 BoogieIcfgContainer [2018-09-14 16:17:25,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:17:25,623 INFO L168 Benchmark]: Toolchain (without parser) took 216977.03 ms. Allocated memory was 1.5 GB in the beginning and 5.0 GB in the end (delta: 3.4 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-14 16:17:25,624 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-09-14 16:17:25,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2361.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. [2018-09-14 16:17:25,625 INFO L168 Benchmark]: Boogie Procedure Inliner took 133.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:17:25,626 INFO L168 Benchmark]: Boogie Preprocessor took 605.18 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 859.8 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. [2018-09-14 16:17:25,627 INFO L168 Benchmark]: RCFGBuilder took 11561.60 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 165.2 MB). Free memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: -129.0 MB). Peak memory consumption was 699.9 MB. Max. memory is 7.1 GB. [2018-09-14 16:17:25,628 INFO L168 Benchmark]: TraceAbstraction took 202303.33 ms. Allocated memory was 2.6 GB in the beginning and 5.0 GB in the end (delta: 2.4 GB). Free memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: -140.5 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-14 16:17:25,633 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2361.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 133.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 605.18 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 859.8 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11561.60 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 165.2 MB). Free memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: -129.0 MB). Peak memory consumption was 699.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202303.33 ms. Allocated memory was 2.6 GB in the beginning and 5.0 GB in the end (delta: 2.4 GB). Free memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: -140.5 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4799]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4799). Cancelled while BasicCegarLoop was constructing difference of abstraction (172058states) and FLOYD_HOARE automaton (currently 54 states, 15 states before enhancement), while ReachableStatesComputation was computing reachable states (355917 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 907 locations, 1 error locations. TIMEOUT Result, 202.2s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 127.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3112 SDtfs, 47552 SDslu, 2573 SDs, 0 SdLazy, 85905 SolverSat, 27178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35768 GetRequests, 35521 SyntacticMatches, 68 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172058occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 15.6s AutomataMinimizationTime, 11 MinimizatonAttempts, 6182 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 38.1s InterpolantComputationTime, 29795 NumberOfCodeBlocks, 29795 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 47535 ConstructedInterpolants, 0 QuantifiedInterpolants, 87063692 SizeOfPredicates, 18 NumberOfNonLiveVariables, 24804 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 46 InterpolantComputations, 10 PerfectInterpolantSequences, 10689/11120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label42_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-17-25-646.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label42_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-17-25-646.csv Completed graceful shutdown