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_label47_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:14:34,664 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:14:34,666 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:14:34,683 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:14:34,683 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:14:34,685 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:14:34,686 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:14:34,688 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:14:34,690 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:14:34,690 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:14:34,691 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:14:34,692 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:14:34,693 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:14:34,694 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:14:34,695 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:14:34,696 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:14:34,697 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:14:34,699 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:14:34,701 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:14:34,702 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:14:34,704 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:14:34,705 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:14:34,707 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:14:34,708 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:14:34,708 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:14:34,709 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:14:34,711 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:14:34,712 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:14:34,713 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:14:34,714 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:14:34,714 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:14:34,715 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:14:34,715 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:14:34,715 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:14:34,716 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:14:34,717 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:14:34,718 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 16:14:34,735 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:14:34,735 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:14:34,736 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:14:34,736 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:14:34,736 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:14:34,736 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:14:34,737 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:14:34,737 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:14:34,737 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:14:34,737 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:14:34,737 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:14:34,738 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:14:34,738 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:14:34,739 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:14:34,739 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:14:34,739 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:14:34,739 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:14:34,739 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:14:34,740 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:14:34,740 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:14:34,740 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:14:34,740 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:14:34,740 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:14:34,741 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:14:34,741 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:14:34,741 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:14:34,741 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:14:34,741 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:14:34,742 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:14:34,742 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:14:34,742 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:14:34,742 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:14:34,742 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:14:34,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:14:34,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:14:34,817 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:14:34,819 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:14:34,819 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:14:34,820 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label47_true-unreach-call.c [2018-09-14 16:14:35,202 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e54612a5/77b36facdd584f42ad16ffe49bfb64d2/FLAGe424c6d63 [2018-09-14 16:14:35,733 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:14:35,734 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label47_true-unreach-call.c [2018-09-14 16:14:35,767 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e54612a5/77b36facdd584f42ad16ffe49bfb64d2/FLAGe424c6d63 [2018-09-14 16:14:35,784 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e54612a5/77b36facdd584f42ad16ffe49bfb64d2 [2018-09-14 16:14:35,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:14:35,799 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:14:35,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:14:35,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:14:35,807 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:14:35,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:14:35" (1/1) ... [2018-09-14 16:14:35,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d0561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:35, skipping insertion in model container [2018-09-14 16:14:35,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:14:35" (1/1) ... [2018-09-14 16:14:35,824 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:14:37,185 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:14:37,205 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:14:37,776 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:14:37,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37 WrapperNode [2018-09-14 16:14:37,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:14:37,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:14:37,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:14:37,946 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:14:37,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:14:38,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:14:38,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:14:38,076 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:14:38,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (1/1) ... [2018-09-14 16:14:38,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:14:38,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:14:38,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:14:38,671 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:14:38,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (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 16:14:38,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:14:38,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:14:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-09-14 16:14:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-09-14 16:14:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-09-14 16:14:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-09-14 16:14:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 16:14:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 16:14:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:14:38,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:14:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:14:38,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:14:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:14:38,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:14:48,681 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:14:48,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:14:48 BoogieIcfgContainer [2018-09-14 16:14:48,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:14:48,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:14:48,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:14:48,687 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:14:48,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:14:35" (1/3) ... [2018-09-14 16:14:48,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d90b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:14:48, skipping insertion in model container [2018-09-14 16:14:48,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:14:37" (2/3) ... [2018-09-14 16:14:48,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d90b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:14:48, skipping insertion in model container [2018-09-14 16:14:48,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:14:48" (3/3) ... [2018-09-14 16:14:48,690 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label47_true-unreach-call.c [2018-09-14 16:14:48,699 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:14:48,709 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:14:48,786 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:14:48,787 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:14:48,787 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:14:48,787 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:14:48,788 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:14:48,788 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:14:48,788 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:14:48,788 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:14:48,788 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:14:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states. [2018-09-14 16:14:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2018-09-14 16:14:48,908 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:48,910 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] [2018-09-14 16:14:48,912 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:48,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1174740009, now seen corresponding path program 1 times [2018-09-14 16:14:48,921 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:48,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:48,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:48,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:48,978 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:51,492 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 16:14:51,495 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:14:51,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:14:51,495 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:14:51,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:14:51,515 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:14:51,515 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:14:51,518 INFO L87 Difference]: Start difference. First operand 907 states. Second operand 3 states. [2018-09-14 16:14:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:14:57,688 INFO L93 Difference]: Finished difference Result 2647 states and 5102 transitions. [2018-09-14 16:14:57,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:14:57,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 799 [2018-09-14 16:14:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:14:57,731 INFO L225 Difference]: With dead ends: 2647 [2018-09-14 16:14:57,731 INFO L226 Difference]: Without dead ends: 1738 [2018-09-14 16:14:57,744 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 16:14:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2018-09-14 16:14:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1738. [2018-09-14 16:14:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2018-09-14 16:14:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3145 transitions. [2018-09-14 16:14:57,940 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3145 transitions. Word has length 799 [2018-09-14 16:14:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:14:57,944 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 3145 transitions. [2018-09-14 16:14:57,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:14:57,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3145 transitions. [2018-09-14 16:14:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2018-09-14 16:14:57,977 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:14:57,978 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-14 16:14:57,978 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:14:57,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1451892328, now seen corresponding path program 1 times [2018-09-14 16:14:57,980 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:14:57,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:57,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:14:57,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:14:57,982 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:14:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:14:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:14:59,673 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:14:59,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:14:59,673 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:14:59,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:14:59,679 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:14:59,679 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:14:59,679 INFO L87 Difference]: Start difference. First operand 1738 states and 3145 transitions. Second operand 4 states. [2018-09-14 16:15:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:15:10,151 INFO L93 Difference]: Finished difference Result 6810 states and 12578 transitions. [2018-09-14 16:15:10,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:15:10,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 808 [2018-09-14 16:15:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:15:10,196 INFO L225 Difference]: With dead ends: 6810 [2018-09-14 16:15:10,197 INFO L226 Difference]: Without dead ends: 5078 [2018-09-14 16:15:10,208 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:15:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2018-09-14 16:15:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 5078. [2018-09-14 16:15:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5078 states. [2018-09-14 16:15:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 8205 transitions. [2018-09-14 16:15:10,374 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 8205 transitions. Word has length 808 [2018-09-14 16:15:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:15:10,376 INFO L480 AbstractCegarLoop]: Abstraction has 5078 states and 8205 transitions. [2018-09-14 16:15:10,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:15:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 8205 transitions. [2018-09-14 16:15:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2018-09-14 16:15:10,407 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:10,408 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-14 16:15:10,408 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1590076520, now seen corresponding path program 1 times [2018-09-14 16:15:10,409 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:10,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:10,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:10,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:10,411 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:15:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:11,381 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:15:11,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-14 16:15:11,382 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:15:11,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:15:11,383 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:15:11,384 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:15:11,384 INFO L87 Difference]: Start difference. First operand 5078 states and 8205 transitions. Second operand 7 states. [2018-09-14 16:15:13,024 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-09-14 16:15:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:15:21,973 INFO L93 Difference]: Finished difference Result 13035 states and 21465 transitions. [2018-09-14 16:15:21,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:15:21,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 821 [2018-09-14 16:15:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:15:22,028 INFO L225 Difference]: With dead ends: 13035 [2018-09-14 16:15:22,028 INFO L226 Difference]: Without dead ends: 7963 [2018-09-14 16:15:22,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:15:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7963 states. [2018-09-14 16:15:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7963 to 7837. [2018-09-14 16:15:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7837 states. [2018-09-14 16:15:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7837 states to 7837 states and 12212 transitions. [2018-09-14 16:15:22,270 INFO L78 Accepts]: Start accepts. Automaton has 7837 states and 12212 transitions. Word has length 821 [2018-09-14 16:15:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:15:22,271 INFO L480 AbstractCegarLoop]: Abstraction has 7837 states and 12212 transitions. [2018-09-14 16:15:22,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:15:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7837 states and 12212 transitions. [2018-09-14 16:15:22,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2018-09-14 16:15:22,303 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:22,304 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:22,304 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1667296747, now seen corresponding path program 1 times [2018-09-14 16:15:22,305 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:22,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:22,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:22,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:22,306 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:15:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:22,670 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:15:23,009 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 16:15:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:23,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:23,555 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 16:15:23,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:23,568 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:23,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:24,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:25,079 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:15:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:25,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:25,481 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 16:15:25,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:25,499 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:26,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-14 16:15:27,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-14 16:15:28,507 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:15:28,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5, 5, 5] total 20 [2018-09-14 16:15:28,508 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:15:28,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:15:28,510 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:15:28,511 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2018-09-14 16:15:28,511 INFO L87 Difference]: Start difference. First operand 7837 states and 12212 transitions. Second operand 5 states. [2018-09-14 16:15:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:15:36,457 INFO L93 Difference]: Finished difference Result 24015 states and 38640 transitions. [2018-09-14 16:15:36,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:15:36,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 841 [2018-09-14 16:15:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:15:36,546 INFO L225 Difference]: With dead ends: 24015 [2018-09-14 16:15:36,546 INFO L226 Difference]: Without dead ends: 16184 [2018-09-14 16:15:36,567 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3375 GetRequests, 3353 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2018-09-14 16:15:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2018-09-14 16:15:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 16170. [2018-09-14 16:15:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16170 states. [2018-09-14 16:15:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16170 states to 16170 states and 24826 transitions. [2018-09-14 16:15:37,025 INFO L78 Accepts]: Start accepts. Automaton has 16170 states and 24826 transitions. Word has length 841 [2018-09-14 16:15:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:15:37,026 INFO L480 AbstractCegarLoop]: Abstraction has 16170 states and 24826 transitions. [2018-09-14 16:15:37,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:15:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 16170 states and 24826 transitions. [2018-09-14 16:15:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2018-09-14 16:15:37,086 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:37,087 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:15:37,087 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:37,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1146013444, now seen corresponding path program 1 times [2018-09-14 16:15:37,088 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:37,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:37,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:37,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:37,089 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:15:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:37,443 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:15:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:38,089 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:15:38,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:15:38,090 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:15:38,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:15:38,092 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:15:38,092 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:15:38,093 INFO L87 Difference]: Start difference. First operand 16170 states and 24826 transitions. Second operand 6 states. [2018-09-14 16:15:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:15:44,995 INFO L93 Difference]: Finished difference Result 32841 states and 51785 transitions. [2018-09-14 16:15:44,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:15:44,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 858 [2018-09-14 16:15:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:15:45,069 INFO L225 Difference]: With dead ends: 32841 [2018-09-14 16:15:45,069 INFO L226 Difference]: Without dead ends: 16677 [2018-09-14 16:15:45,117 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 16:15:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2018-09-14 16:15:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16584. [2018-09-14 16:15:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16584 states. [2018-09-14 16:15:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16584 states to 16584 states and 23742 transitions. [2018-09-14 16:15:45,490 INFO L78 Accepts]: Start accepts. Automaton has 16584 states and 23742 transitions. Word has length 858 [2018-09-14 16:15:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:15:45,491 INFO L480 AbstractCegarLoop]: Abstraction has 16584 states and 23742 transitions. [2018-09-14 16:15:45,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:15:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 16584 states and 23742 transitions. [2018-09-14 16:15:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-14 16:15:45,549 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:45,550 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:45,550 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:45,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1596952933, now seen corresponding path program 1 times [2018-09-14 16:15:45,551 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:45,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:45,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:45,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:45,552 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:15:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:46,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:46,665 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 16:15:46,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:46,683 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:46,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:48,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:49,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:15:49,761 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 16:15:49,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:49,791 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:15:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:15:50,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:15:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:51,548 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:15:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:15:52,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:15:52,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-14 16:15:52,794 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:15:52,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:15:52,796 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:15:52,797 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:15:52,797 INFO L87 Difference]: Start difference. First operand 16584 states and 23742 transitions. Second operand 9 states. [2018-09-14 16:16:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:08,114 INFO L93 Difference]: Finished difference Result 56643 states and 85134 transitions. [2018-09-14 16:16:08,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-14 16:16:08,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 867 [2018-09-14 16:16:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:08,274 INFO L225 Difference]: With dead ends: 56643 [2018-09-14 16:16:08,275 INFO L226 Difference]: Without dead ends: 40065 [2018-09-14 16:16:08,337 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3506 GetRequests, 3466 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=352, Invalid=1288, Unknown=0, NotChecked=0, Total=1640 [2018-09-14 16:16:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40065 states. [2018-09-14 16:16:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40065 to 39505. [2018-09-14 16:16:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39505 states. [2018-09-14 16:16:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39505 states to 39505 states and 52109 transitions. [2018-09-14 16:16:09,526 INFO L78 Accepts]: Start accepts. Automaton has 39505 states and 52109 transitions. Word has length 867 [2018-09-14 16:16:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:09,527 INFO L480 AbstractCegarLoop]: Abstraction has 39505 states and 52109 transitions. [2018-09-14 16:16:09,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:16:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 39505 states and 52109 transitions. [2018-09-14 16:16:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2018-09-14 16:16:09,627 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:09,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:09,628 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash -853051257, now seen corresponding path program 1 times [2018-09-14 16:16:09,629 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:09,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:09,630 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:10,047 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:16:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 154 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:11,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:11,672 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) [2018-09-14 16:16:11,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:11,687 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:16:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:11,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:12,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:13,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:13,480 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 16:16:13,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:13,498 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:14,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:15,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:15,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:16:15,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 16 [2018-09-14 16:16:15,856 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:16:15,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 16:16:15,858 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 16:16:15,858 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:16:15,859 INFO L87 Difference]: Start difference. First operand 39505 states and 52109 transitions. Second operand 13 states. [2018-09-14 16:16:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:40,047 INFO L93 Difference]: Finished difference Result 125042 states and 191258 transitions. [2018-09-14 16:16:40,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-14 16:16:40,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 958 [2018-09-14 16:16:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:40,597 INFO L225 Difference]: With dead ends: 125042 [2018-09-14 16:16:40,597 INFO L226 Difference]: Without dead ends: 85543 [2018-09-14 16:16:40,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3918 GetRequests, 3854 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=894, Invalid=2888, Unknown=0, NotChecked=0, Total=3782 [2018-09-14 16:16:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85543 states. [2018-09-14 16:16:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85543 to 83897. [2018-09-14 16:16:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83897 states. [2018-09-14 16:16:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83897 states to 83897 states and 113694 transitions. [2018-09-14 16:16:43,616 INFO L78 Accepts]: Start accepts. Automaton has 83897 states and 113694 transitions. Word has length 958 [2018-09-14 16:16:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:43,617 INFO L480 AbstractCegarLoop]: Abstraction has 83897 states and 113694 transitions. [2018-09-14 16:16:43,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 16:16:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 83897 states and 113694 transitions. [2018-09-14 16:16:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2018-09-14 16:16:43,784 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:43,785 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:43,786 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1670873247, now seen corresponding path program 1 times [2018-09-14 16:16:43,786 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:43,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:43,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:43,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:43,789 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 202 proven. 87 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-14 16:16:44,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:44,956 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 16:16:44,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:44,972 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:45,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-09-14 16:16:46,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-09-14 16:16:47,659 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:16:47,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:16:47,660 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:16:47,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:16:47,661 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:16:47,661 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:16:47,662 INFO L87 Difference]: Start difference. First operand 83897 states and 113694 transitions. Second operand 3 states. [2018-09-14 16:16:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:52,613 INFO L93 Difference]: Finished difference Result 167428 states and 226924 transitions. [2018-09-14 16:16:52,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:16:52,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 985 [2018-09-14 16:16:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:52,905 INFO L225 Difference]: With dead ends: 167428 [2018-09-14 16:16:52,906 INFO L226 Difference]: Without dead ends: 83542 [2018-09-14 16:16:53,077 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1975 GetRequests, 1965 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:16:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83542 states. [2018-09-14 16:16:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83542 to 83475. [2018-09-14 16:16:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83475 states. [2018-09-14 16:16:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83475 states to 83475 states and 108748 transitions. [2018-09-14 16:16:54,688 INFO L78 Accepts]: Start accepts. Automaton has 83475 states and 108748 transitions. Word has length 985 [2018-09-14 16:16:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:54,689 INFO L480 AbstractCegarLoop]: Abstraction has 83475 states and 108748 transitions. [2018-09-14 16:16:54,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:16:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 83475 states and 108748 transitions. [2018-09-14 16:16:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2018-09-14 16:16:54,839 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:54,840 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:54,843 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2048875234, now seen corresponding path program 1 times [2018-09-14 16:16:54,844 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:54,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:54,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:54,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:54,845 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 209 proven. 41 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-09-14 16:16:56,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:56,020 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:16:56,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:56,028 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:56,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-14 16:16:57,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 237 proven. 46 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-14 16:16:57,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:57,921 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:16:57,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:57,940 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:58,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-14 16:16:59,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 237 proven. 46 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-14 16:17:00,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:17:00,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 16:17:00,442 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:17:00,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:17:00,443 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:17:00,443 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:17:00,444 INFO L87 Difference]: Start difference. First operand 83475 states and 108748 transitions. Second operand 9 states. [2018-09-14 16:17:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:17:18,612 INFO L93 Difference]: Finished difference Result 230301 states and 331697 transitions. [2018-09-14 16:17:18,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-14 16:17:18,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 994 [2018-09-14 16:17:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:17:19,135 INFO L225 Difference]: With dead ends: 230301 [2018-09-14 16:17:19,135 INFO L226 Difference]: Without dead ends: 146837 [2018-09-14 16:17:19,300 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4032 GetRequests, 3990 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2018-09-14 16:17:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146837 states. [2018-09-14 16:17:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146837 to 143253. [2018-09-14 16:17:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143253 states. [2018-09-14 16:17:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143253 states to 143253 states and 175100 transitions. [2018-09-14 16:17:22,268 INFO L78 Accepts]: Start accepts. Automaton has 143253 states and 175100 transitions. Word has length 994 [2018-09-14 16:17:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:17:22,269 INFO L480 AbstractCegarLoop]: Abstraction has 143253 states and 175100 transitions. [2018-09-14 16:17:22,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:17:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 143253 states and 175100 transitions. [2018-09-14 16:17:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1230 [2018-09-14 16:17:22,486 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:17:22,488 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:17:22,488 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:17:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 159031310, now seen corresponding path program 1 times [2018-09-14 16:17:22,489 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:17:22,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:22,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:22,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:22,493 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:17:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 587 proven. 157 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-14 16:17:24,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:17:24,959 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:17:24,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:24,968 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:17:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:25,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:17:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 535 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-09-14 16:17:26,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 535 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-09-14 16:17:27,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:17:27,931 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 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:17:27,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:27,950 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:17:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:28,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:17:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 535 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-09-14 16:17:29,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 535 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-09-14 16:17:30,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:17:30,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 16:17:30,607 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:17:30,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:17:30,609 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:17:30,609 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:17:30,609 INFO L87 Difference]: Start difference. First operand 143253 states and 175100 transitions. Second operand 9 states. [2018-09-14 16:17:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:17:47,584 INFO L93 Difference]: Finished difference Result 329760 states and 424198 transitions. [2018-09-14 16:17:47,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-14 16:17:47,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1229 [2018-09-14 16:17:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:17:48,110 INFO L225 Difference]: With dead ends: 329760 [2018-09-14 16:17:48,110 INFO L226 Difference]: Without dead ends: 187348 [2018-09-14 16:17:48,310 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4970 GetRequests, 4930 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2018-09-14 16:17:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187348 states. [2018-09-14 16:17:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187348 to 184593. [2018-09-14 16:17:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184593 states. [2018-09-14 16:17:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184593 states to 184593 states and 208143 transitions. [2018-09-14 16:17:52,143 INFO L78 Accepts]: Start accepts. Automaton has 184593 states and 208143 transitions. Word has length 1229 [2018-09-14 16:17:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:17:52,145 INFO L480 AbstractCegarLoop]: Abstraction has 184593 states and 208143 transitions. [2018-09-14 16:17:52,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:17:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 184593 states and 208143 transitions. [2018-09-14 16:17:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1456 [2018-09-14 16:17:52,276 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:17:52,277 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:17:52,277 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:17:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1649922553, now seen corresponding path program 1 times [2018-09-14 16:17:52,278 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:17:52,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:52,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:52,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:52,279 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:17:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 647 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-14 16:17:55,515 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:17:55,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:17:55,516 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:17:55,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:17:55,517 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:17:55,517 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:17:55,517 INFO L87 Difference]: Start difference. First operand 184593 states and 208143 transitions. Second operand 3 states. [2018-09-14 16:18:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:18:01,370 INFO L93 Difference]: Finished difference Result 363945 states and 410759 transitions. [2018-09-14 16:18:01,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:18:01,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1455 [2018-09-14 16:18:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:18:01,812 INFO L225 Difference]: With dead ends: 363945 [2018-09-14 16:18:01,812 INFO L226 Difference]: Without dead ends: 180193 [2018-09-14 16:18:02,049 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:18:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180193 states. Received shutdown request... [2018-09-14 16:18:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180193 to 180114. [2018-09-14 16:18:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180114 states. [2018-09-14 16:18:04,945 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:18:04,950 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:18:04,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:18:04 BoogieIcfgContainer [2018-09-14 16:18:04,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:18:04,951 INFO L168 Benchmark]: Toolchain (without parser) took 209154.94 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -242.7 MB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2018-09-14 16:18:04,952 INFO L168 Benchmark]: CDTParser took 0.20 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 16:18:04,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2144.79 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 16:18:04,953 INFO L168 Benchmark]: Boogie Procedure Inliner took 129.90 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 16:18:04,954 INFO L168 Benchmark]: Boogie Preprocessor took 594.24 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 856.2 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 85.0 MB. Max. memory is 7.1 GB. [2018-09-14 16:18:04,955 INFO L168 Benchmark]: RCFGBuilder took 10012.15 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 178.3 MB). Free memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: -148.7 MB). Peak memory consumption was 701.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:18:04,956 INFO L168 Benchmark]: TraceAbstraction took 196267.05 ms. Allocated memory was 2.6 GB in the beginning and 3.7 GB in the end (delta: 1.2 GB). Free memory was 2.4 GB in the beginning and 1.7 GB in the end (delta: 765.6 MB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2018-09-14 16:18:04,962 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2144.79 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 129.90 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 594.24 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 856.2 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 85.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10012.15 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 178.3 MB). Free memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: -148.7 MB). Peak memory consumption was 701.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 196267.05 ms. Allocated memory was 2.6 GB in the beginning and 3.7 GB in the end (delta: 1.2 GB). Free memory was 2.4 GB in the beginning and 1.7 GB in the end (delta: 765.6 MB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4715]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4715). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 907 locations, 1 error locations. TIMEOUT Result, 196.1s OverallTime, 11 OverallIterations, 6 TraceHistogramMax, 131.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3485 SDtfs, 49681 SDslu, 2786 SDs, 0 SdLazy, 76594 SolverSat, 32446 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 93.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21824 GetRequests, 21578 SyntacticMatches, 24 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184593occurred in iteration=10, 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: 16.7s AutomataMinimizationTime, 11 MinimizatonAttempts, 8845 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 31.3s InterpolantComputationTime, 21378 NumberOfCodeBlocks, 21378 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 32108 ConstructedInterpolants, 0 QuantifiedInterpolants, 51004038 SizeOfPredicates, 6 NumberOfNonLiveVariables, 15821 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 33 InterpolantComputations, 8 PerfectInterpolantSequences, 8826/9275 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_label47_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-18-04-979.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label47_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-18-04-979.csv Completed graceful shutdown