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/Problem03_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:10:36,631 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:10:36,633 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:10:36,646 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:10:36,646 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:10:36,647 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:10:36,648 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:10:36,650 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:10:36,652 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:10:36,653 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:10:36,654 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:10:36,654 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:10:36,655 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:10:36,656 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:10:36,658 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:10:36,658 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:10:36,660 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:10:36,662 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:10:36,664 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:10:36,666 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:10:36,667 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:10:36,668 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:10:36,671 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 10:10:36,671 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 10:10:36,672 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 10:10:36,673 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 10:10:36,674 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 10:10:36,675 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 10:10:36,675 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 10:10:36,677 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 10:10:36,677 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 10:10:36,678 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 10:10:36,678 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 10:10:36,678 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 10:10:36,679 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 10:10:36,680 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 10:10:36,680 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 [2018-09-18 10:10:36,697 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:10:36,697 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:10:36,698 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:10:36,698 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:10:36,698 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:10:36,699 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:10:36,699 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:10:36,699 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:10:36,699 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:10:36,699 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:10:36,700 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:10:36,700 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:10:36,701 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:10:36,701 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:10:36,701 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:10:36,701 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:10:36,701 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:10:36,701 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:10:36,702 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:10:36,702 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:10:36,702 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:10:36,702 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:10:36,702 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:10:36,703 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:10:36,703 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:10:36,703 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:10:36,703 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:10:36,703 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:10:36,704 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:10:36,704 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:10:36,704 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:10:36,704 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:10:36,704 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:10:36,705 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:10:36,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:10:36,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:10:36,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:10:36,768 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:10:36,769 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:10:36,770 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-09-18 10:10:37,130 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966bf2011/17873036bd2a489f970aa8395414d3e4/FLAG36d996367 [2018-09-18 10:10:37,510 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:10:37,511 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-09-18 10:10:37,532 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966bf2011/17873036bd2a489f970aa8395414d3e4/FLAG36d996367 [2018-09-18 10:10:37,555 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966bf2011/17873036bd2a489f970aa8395414d3e4 [2018-09-18 10:10:37,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:10:37,572 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:10:37,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:10:37,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:10:37,584 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:10:37,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:10:37" (1/1) ... [2018-09-18 10:10:37,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca53d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:37, skipping insertion in model container [2018-09-18 10:10:37,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:10:37" (1/1) ... [2018-09-18 10:10:37,603 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:10:38,380 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:10:38,404 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:10:38,725 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:10:38,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38 WrapperNode [2018-09-18 10:10:38,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:10:38,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:10:38,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:10:38,804 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:10:38,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:38,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:38,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:10:38,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:10:38,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:10:38,963 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:10:39,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:39,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:39,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:39,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:39,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:39,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:39,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (1/1) ... [2018-09-18 10:10:39,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:10:39,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:10:39,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:10:39,349 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:10:39,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (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 [2018-09-18 10:10:39,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:10:39,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:10:39,413 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:10:39,413 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:10:39,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:10:39,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:10:39,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:10:39,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:10:44,552 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:10:44,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:10:44 BoogieIcfgContainer [2018-09-18 10:10:44,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:10:44,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:10:44,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:10:44,562 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:10:44,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:10:37" (1/3) ... [2018-09-18 10:10:44,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e816e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:10:44, skipping insertion in model container [2018-09-18 10:10:44,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:38" (2/3) ... [2018-09-18 10:10:44,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e816e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:10:44, skipping insertion in model container [2018-09-18 10:10:44,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:10:44" (3/3) ... [2018-09-18 10:10:44,567 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12_true-unreach-call.c [2018-09-18 10:10:44,580 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:10:44,592 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:10:44,668 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:10:44,669 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:10:44,670 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:10:44,670 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:10:44,670 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:10:44,670 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:10:44,670 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:10:44,671 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:10:44,671 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:10:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:10:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-18 10:10:44,727 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:44,728 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] [2018-09-18 10:10:44,730 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:44,736 INFO L82 PathProgramCache]: Analyzing trace with hash -927745007, now seen corresponding path program 1 times [2018-09-18 10:10:44,739 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:44,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:44,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:44,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:44,804 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:45,714 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:10:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:45,955 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:45,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:10:45,956 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:45,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:45,983 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:45,983 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:45,988 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-18 10:10:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:47,955 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-09-18 10:10:47,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:47,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-09-18 10:10:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:47,986 INFO L225 Difference]: With dead ends: 845 [2018-09-18 10:10:47,986 INFO L226 Difference]: Without dead ends: 531 [2018-09-18 10:10:47,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-18 10:10:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-09-18 10:10:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-09-18 10:10:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-09-18 10:10:48,091 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 170 [2018-09-18 10:10:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:48,092 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-09-18 10:10:48,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-09-18 10:10:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-18 10:10:48,104 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:48,110 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-18 10:10:48,110 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1807947448, now seen corresponding path program 1 times [2018-09-18 10:10:48,111 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:48,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:48,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:48,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:48,118 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:48,456 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:10:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:48,808 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:48,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:10:48,808 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:48,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:10:48,813 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:10:48,813 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:10:48,813 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-09-18 10:10:49,069 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 10:10:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:53,294 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-09-18 10:10:53,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 10:10:53,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-09-18 10:10:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:53,308 INFO L225 Difference]: With dead ends: 1599 [2018-09-18 10:10:53,308 INFO L226 Difference]: Without dead ends: 1075 [2018-09-18 10:10:53,312 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 [2018-09-18 10:10:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-09-18 10:10:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-09-18 10:10:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-09-18 10:10:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-09-18 10:10:53,389 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 180 [2018-09-18 10:10:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:53,390 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-09-18 10:10:53,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:10:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-09-18 10:10:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-18 10:10:53,394 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:53,395 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:53,395 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash 479453333, now seen corresponding path program 1 times [2018-09-18 10:10:53,396 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:53,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:53,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:53,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:53,397 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:53,720 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:53,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:10:53,721 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:53,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:53,724 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:53,724 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:53,724 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-09-18 10:10:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:56,103 INFO L93 Difference]: Finished difference Result 2912 states and 4936 transitions. [2018-09-18 10:10:56,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:56,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-09-18 10:10:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:56,123 INFO L225 Difference]: With dead ends: 2912 [2018-09-18 10:10:56,123 INFO L226 Difference]: Without dead ends: 1884 [2018-09-18 10:10:56,128 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-18 10:10:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1881. [2018-09-18 10:10:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1881 states. [2018-09-18 10:10:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2981 transitions. [2018-09-18 10:10:56,212 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2981 transitions. Word has length 183 [2018-09-18 10:10:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:56,215 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2981 transitions. [2018-09-18 10:10:56,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2981 transitions. [2018-09-18 10:10:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-18 10:10:56,223 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:56,223 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-18 10:10:56,223 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:56,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1957803305, now seen corresponding path program 1 times [2018-09-18 10:10:56,224 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:56,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:56,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:56,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:56,225 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:56,462 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:56,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-18 10:10:56,462 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:56,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:10:56,463 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:10:56,463 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:10:56,463 INFO L87 Difference]: Start difference. First operand 1881 states and 2981 transitions. Second operand 7 states. [2018-09-18 10:10:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:58,932 INFO L93 Difference]: Finished difference Result 5729 states and 9791 transitions. [2018-09-18 10:10:58,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:10:58,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2018-09-18 10:10:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:58,967 INFO L225 Difference]: With dead ends: 5729 [2018-09-18 10:10:58,967 INFO L226 Difference]: Without dead ends: 3854 [2018-09-18 10:10:58,976 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:10:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2018-09-18 10:10:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3744. [2018-09-18 10:10:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3744 states. [2018-09-18 10:10:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 6108 transitions. [2018-09-18 10:10:59,142 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 6108 transitions. Word has length 189 [2018-09-18 10:10:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:59,143 INFO L480 AbstractCegarLoop]: Abstraction has 3744 states and 6108 transitions. [2018-09-18 10:10:59,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:10:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 6108 transitions. [2018-09-18 10:10:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-18 10:10:59,156 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:59,157 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-18 10:10:59,157 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -551348028, now seen corresponding path program 1 times [2018-09-18 10:10:59,158 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:59,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:59,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:59,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:59,159 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:59,481 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:59,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:10:59,481 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:59,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:10:59,482 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:10:59,482 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:10:59,482 INFO L87 Difference]: Start difference. First operand 3744 states and 6108 transitions. Second operand 6 states. [2018-09-18 10:11:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:01,863 INFO L93 Difference]: Finished difference Result 8125 states and 13602 transitions. [2018-09-18 10:11:01,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:11:01,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2018-09-18 10:11:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:01,890 INFO L225 Difference]: With dead ends: 8125 [2018-09-18 10:11:01,890 INFO L226 Difference]: Without dead ends: 4387 [2018-09-18 10:11:01,905 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:11:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2018-09-18 10:11:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4215. [2018-09-18 10:11:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2018-09-18 10:11:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6296 transitions. [2018-09-18 10:11:02,028 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6296 transitions. Word has length 190 [2018-09-18 10:11:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:02,029 INFO L480 AbstractCegarLoop]: Abstraction has 4215 states and 6296 transitions. [2018-09-18 10:11:02,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:11:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6296 transitions. [2018-09-18 10:11:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-18 10:11:02,040 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:02,041 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:02,041 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1721729602, now seen corresponding path program 1 times [2018-09-18 10:11:02,042 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:02,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:02,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:02,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:02,043 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:02,300 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:11:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:02,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:02,410 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 [2018-09-18 10:11:02,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:02,419 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:02,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:11:02,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:11:03,100 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:11:03,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-09-18 10:11:03,101 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:03,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:11:03,102 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:11:03,102 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:11:03,104 INFO L87 Difference]: Start difference. First operand 4215 states and 6296 transitions. Second operand 3 states. [2018-09-18 10:11:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:04,129 INFO L93 Difference]: Finished difference Result 8422 states and 12588 transitions. [2018-09-18 10:11:04,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:11:04,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2018-09-18 10:11:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:04,149 INFO L225 Difference]: With dead ends: 8422 [2018-09-18 10:11:04,149 INFO L226 Difference]: Without dead ends: 4213 [2018-09-18 10:11:04,159 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:11:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2018-09-18 10:11:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4213. [2018-09-18 10:11:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4213 states. [2018-09-18 10:11:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 6292 transitions. [2018-09-18 10:11:04,268 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 6292 transitions. Word has length 194 [2018-09-18 10:11:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:04,268 INFO L480 AbstractCegarLoop]: Abstraction has 4213 states and 6292 transitions. [2018-09-18 10:11:04,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:11:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 6292 transitions. [2018-09-18 10:11:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-09-18 10:11:04,281 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:04,281 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:04,282 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:04,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1241817260, now seen corresponding path program 1 times [2018-09-18 10:11:04,282 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:04,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:04,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:04,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:04,283 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:04,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:04,759 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:04,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:04,776 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:04,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:05,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:05,470 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:11:05,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:11:05,547 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:05,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:11:05,548 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:11:05,548 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:11:05,548 INFO L87 Difference]: Start difference. First operand 4213 states and 6292 transitions. Second operand 3 states. [2018-09-18 10:11:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:07,694 INFO L93 Difference]: Finished difference Result 12317 states and 18981 transitions. [2018-09-18 10:11:07,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:11:07,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2018-09-18 10:11:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:07,737 INFO L225 Difference]: With dead ends: 12317 [2018-09-18 10:11:07,737 INFO L226 Difference]: Without dead ends: 8110 [2018-09-18 10:11:07,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 400 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:11:07,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8110 states. [2018-09-18 10:11:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8110 to 7965. [2018-09-18 10:11:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7965 states. [2018-09-18 10:11:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 12011 transitions. [2018-09-18 10:11:07,980 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 12011 transitions. Word has length 201 [2018-09-18 10:11:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:07,981 INFO L480 AbstractCegarLoop]: Abstraction has 7965 states and 12011 transitions. [2018-09-18 10:11:07,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:11:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 12011 transitions. [2018-09-18 10:11:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-18 10:11:08,004 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:08,004 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:08,005 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2073570488, now seen corresponding path program 1 times [2018-09-18 10:11:08,005 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:08,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:08,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:08,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:08,007 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:08,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:08,501 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 [2018-09-18 10:11:08,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:08,518 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:08,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:08,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:09,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:09,064 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 [2018-09-18 10:11:09,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:09,079 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:09,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:09,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:10,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:11:10,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 18 [2018-09-18 10:11:10,012 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:11:10,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:11:10,015 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:11:10,015 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-09-18 10:11:10,016 INFO L87 Difference]: Start difference. First operand 7965 states and 12011 transitions. Second operand 9 states. [2018-09-18 10:11:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:23,912 INFO L93 Difference]: Finished difference Result 66058 states and 136488 transitions. [2018-09-18 10:11:23,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-18 10:11:23,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 203 [2018-09-18 10:11:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:24,419 INFO L225 Difference]: With dead ends: 66058 [2018-09-18 10:11:24,420 INFO L226 Difference]: Without dead ends: 58099 [2018-09-18 10:11:24,567 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2018-09-18 10:11:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58099 states. [2018-09-18 10:11:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58099 to 55162. [2018-09-18 10:11:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55162 states. [2018-09-18 10:11:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55162 states to 55162 states and 79096 transitions. [2018-09-18 10:11:27,460 INFO L78 Accepts]: Start accepts. Automaton has 55162 states and 79096 transitions. Word has length 203 [2018-09-18 10:11:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:27,460 INFO L480 AbstractCegarLoop]: Abstraction has 55162 states and 79096 transitions. [2018-09-18 10:11:27,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:11:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 55162 states and 79096 transitions. [2018-09-18 10:11:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-18 10:11:27,593 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:27,593 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:27,594 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash -652409198, now seen corresponding path program 1 times [2018-09-18 10:11:27,594 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:27,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:27,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:27,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:27,595 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:28,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:28,101 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:28,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:28,117 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:28,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:28,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:28,920 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:11:28,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-18 10:11:28,921 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:28,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:11:28,922 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:11:28,922 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:11:28,922 INFO L87 Difference]: Start difference. First operand 55162 states and 79096 transitions. Second operand 3 states. [2018-09-18 10:11:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:30,949 INFO L93 Difference]: Finished difference Result 107758 states and 153453 transitions. [2018-09-18 10:11:30,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:11:30,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2018-09-18 10:11:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:31,218 INFO L225 Difference]: With dead ends: 107758 [2018-09-18 10:11:31,219 INFO L226 Difference]: Without dead ends: 65980 [2018-09-18 10:11:31,359 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:11:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65980 states. [2018-09-18 10:11:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65980 to 64455. [2018-09-18 10:11:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64455 states. [2018-09-18 10:11:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64455 states to 64455 states and 91904 transitions. [2018-09-18 10:11:33,563 INFO L78 Accepts]: Start accepts. Automaton has 64455 states and 91904 transitions. Word has length 224 [2018-09-18 10:11:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:33,563 INFO L480 AbstractCegarLoop]: Abstraction has 64455 states and 91904 transitions. [2018-09-18 10:11:33,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:11:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 64455 states and 91904 transitions. [2018-09-18 10:11:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-18 10:11:33,670 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:33,671 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, 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] [2018-09-18 10:11:33,671 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash -594808354, now seen corresponding path program 1 times [2018-09-18 10:11:33,672 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:33,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:33,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:33,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:33,673 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:33,985 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:11:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:34,391 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:11:34,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:11:34,392 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:34,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:11:34,393 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:11:34,393 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:11:34,393 INFO L87 Difference]: Start difference. First operand 64455 states and 91904 transitions. Second operand 6 states. [2018-09-18 10:11:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:37,997 INFO L93 Difference]: Finished difference Result 126056 states and 182154 transitions. [2018-09-18 10:11:37,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:11:37,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 234 [2018-09-18 10:11:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:38,293 INFO L225 Difference]: With dead ends: 126056 [2018-09-18 10:11:38,293 INFO L226 Difference]: Without dead ends: 61642 [2018-09-18 10:11:38,434 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:11:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61642 states. [2018-09-18 10:11:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61642 to 60920. [2018-09-18 10:11:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60920 states. [2018-09-18 10:11:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60920 states to 60920 states and 79562 transitions. [2018-09-18 10:11:40,919 INFO L78 Accepts]: Start accepts. Automaton has 60920 states and 79562 transitions. Word has length 234 [2018-09-18 10:11:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:40,919 INFO L480 AbstractCegarLoop]: Abstraction has 60920 states and 79562 transitions. [2018-09-18 10:11:40,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:11:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 60920 states and 79562 transitions. [2018-09-18 10:11:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-18 10:11:40,983 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:40,984 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:40,984 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1451111353, now seen corresponding path program 1 times [2018-09-18 10:11:40,984 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:40,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:40,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:40,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:40,986 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:41,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:41,568 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:41,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:41,579 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:41,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-18 10:11:41,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 66 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:11:41,954 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:11:41,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:11:41,955 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:41,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:11:41,956 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:11:41,956 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:11:41,956 INFO L87 Difference]: Start difference. First operand 60920 states and 79562 transitions. Second operand 5 states. [2018-09-18 10:11:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:44,611 INFO L93 Difference]: Finished difference Result 125115 states and 167511 transitions. [2018-09-18 10:11:44,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:11:44,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 242 [2018-09-18 10:11:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:44,854 INFO L225 Difference]: With dead ends: 125115 [2018-09-18 10:11:44,854 INFO L226 Difference]: Without dead ends: 64271 [2018-09-18 10:11:44,968 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:11:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64271 states. [2018-09-18 10:11:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64271 to 63395. [2018-09-18 10:11:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63395 states. [2018-09-18 10:11:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63395 states to 63395 states and 81031 transitions. [2018-09-18 10:11:46,938 INFO L78 Accepts]: Start accepts. Automaton has 63395 states and 81031 transitions. Word has length 242 [2018-09-18 10:11:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:46,938 INFO L480 AbstractCegarLoop]: Abstraction has 63395 states and 81031 transitions. [2018-09-18 10:11:46,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:11:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 63395 states and 81031 transitions. [2018-09-18 10:11:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-18 10:11:46,997 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:46,997 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:46,997 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1403817372, now seen corresponding path program 1 times [2018-09-18 10:11:46,998 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:46,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:46,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:46,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:46,999 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:47,540 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:11:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:47,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:47,597 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 [2018-09-18 10:11:47,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:47,605 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:47,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:48,041 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:48,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:48,341 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:11:48,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:48,359 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:48,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:48,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:49,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:11:49,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-18 10:11:49,171 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:11:49,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-18 10:11:49,172 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-18 10:11:49,172 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-18 10:11:49,173 INFO L87 Difference]: Start difference. First operand 63395 states and 81031 transitions. Second operand 12 states. [2018-09-18 10:11:52,454 WARN L178 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-18 10:12:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:10,441 INFO L93 Difference]: Finished difference Result 222191 states and 327138 transitions. [2018-09-18 10:12:10,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-18 10:12:10,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 251 [2018-09-18 10:12:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:11,366 INFO L225 Difference]: With dead ends: 222191 [2018-09-18 10:12:11,367 INFO L226 Difference]: Without dead ends: 158820 [2018-09-18 10:12:11,655 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1032 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1531, Invalid=9811, Unknown=0, NotChecked=0, Total=11342 [2018-09-18 10:12:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158820 states. [2018-09-18 10:12:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158820 to 151387. [2018-09-18 10:12:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151387 states. [2018-09-18 10:12:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151387 states to 151387 states and 182989 transitions. [2018-09-18 10:12:15,461 INFO L78 Accepts]: Start accepts. Automaton has 151387 states and 182989 transitions. Word has length 251 [2018-09-18 10:12:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:15,462 INFO L480 AbstractCegarLoop]: Abstraction has 151387 states and 182989 transitions. [2018-09-18 10:12:15,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-18 10:12:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 151387 states and 182989 transitions. [2018-09-18 10:12:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-18 10:12:15,539 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:15,540 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:12:15,540 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1697646380, now seen corresponding path program 1 times [2018-09-18 10:12:15,540 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:15,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:15,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:15,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:15,541 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:16,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:16,184 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:16,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:16,198 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:16,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:16,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:17,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:17,490 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:12:17,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:17,506 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:17,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 113 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:18,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:18,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:12:18,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-09-18 10:12:18,347 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:12:18,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:12:18,348 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:12:18,348 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:12:18,348 INFO L87 Difference]: Start difference. First operand 151387 states and 182989 transitions. Second operand 6 states. [2018-09-18 10:12:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:20,643 INFO L93 Difference]: Finished difference Result 268739 states and 324917 transitions. [2018-09-18 10:12:20,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 10:12:20,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 290 [2018-09-18 10:12:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:21,066 INFO L225 Difference]: With dead ends: 268739 [2018-09-18 10:12:21,067 INFO L226 Difference]: Without dead ends: 125370 [2018-09-18 10:12:21,240 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1150 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:12:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125370 states. [2018-09-18 10:12:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125370 to 124477. [2018-09-18 10:12:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124477 states. [2018-09-18 10:12:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124477 states to 124477 states and 147629 transitions. [2018-09-18 10:12:27,041 INFO L78 Accepts]: Start accepts. Automaton has 124477 states and 147629 transitions. Word has length 290 [2018-09-18 10:12:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:27,041 INFO L480 AbstractCegarLoop]: Abstraction has 124477 states and 147629 transitions. [2018-09-18 10:12:27,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:12:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 124477 states and 147629 transitions. [2018-09-18 10:12:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-09-18 10:12:27,091 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:27,092 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:12:27,092 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash -794164287, now seen corresponding path program 1 times [2018-09-18 10:12:27,092 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:27,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:27,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:27,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:27,093 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:12:27,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:27,532 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:27,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:27,540 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:27,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-18 10:12:27,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:12:28,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:28,082 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:12:28,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:28,098 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:28,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 167 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:28,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 173 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:29,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:12:29,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11, 8] total 26 [2018-09-18 10:12:29,306 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:12:29,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 10:12:29,308 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 10:12:29,308 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2018-09-18 10:12:29,309 INFO L87 Difference]: Start difference. First operand 124477 states and 147629 transitions. Second operand 10 states. [2018-09-18 10:12:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:36,685 INFO L93 Difference]: Finished difference Result 235311 states and 291105 transitions. [2018-09-18 10:12:36,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 10:12:36,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 309 [2018-09-18 10:12:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:37,088 INFO L225 Difference]: With dead ends: 235311 [2018-09-18 10:12:37,088 INFO L226 Difference]: Without dead ends: 131388 [2018-09-18 10:12:37,254 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1268 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2018-09-18 10:12:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131388 states. [2018-09-18 10:12:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131388 to 127318. [2018-09-18 10:12:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127318 states. [2018-09-18 10:12:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127318 states to 127318 states and 146987 transitions. [2018-09-18 10:12:40,008 INFO L78 Accepts]: Start accepts. Automaton has 127318 states and 146987 transitions. Word has length 309 [2018-09-18 10:12:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:40,008 INFO L480 AbstractCegarLoop]: Abstraction has 127318 states and 146987 transitions. [2018-09-18 10:12:40,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 10:12:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 127318 states and 146987 transitions. [2018-09-18 10:12:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-09-18 10:12:40,063 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:40,064 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:12:40,064 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2072347577, now seen corresponding path program 1 times [2018-09-18 10:12:40,064 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:40,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:40,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:40,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:40,065 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 86 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:40,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:40,640 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:40,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:40,649 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:40,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 86 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:12:41,077 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:12:41,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:41,947 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:12:41,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:41,964 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:42,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 86 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:12:42,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:12:42,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:12:42,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 4, 4] total 13 [2018-09-18 10:12:42,818 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:12:42,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:12:42,819 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:12:42,819 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:12:42,819 INFO L87 Difference]: Start difference. First operand 127318 states and 146987 transitions. Second operand 9 states. [2018-09-18 10:12:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:47,990 INFO L93 Difference]: Finished difference Result 237739 states and 287008 transitions. [2018-09-18 10:12:47,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 10:12:47,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 329 [2018-09-18 10:12:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:48,374 INFO L225 Difference]: With dead ends: 237739 [2018-09-18 10:12:48,375 INFO L226 Difference]: Without dead ends: 124865 [2018-09-18 10:12:49,189 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1341 GetRequests, 1312 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2018-09-18 10:12:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124865 states. [2018-09-18 10:12:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124865 to 120591. [2018-09-18 10:12:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120591 states. [2018-09-18 10:12:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120591 states to 120591 states and 138629 transitions. [2018-09-18 10:12:51,176 INFO L78 Accepts]: Start accepts. Automaton has 120591 states and 138629 transitions. Word has length 329 [2018-09-18 10:12:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:51,177 INFO L480 AbstractCegarLoop]: Abstraction has 120591 states and 138629 transitions. [2018-09-18 10:12:51,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:12:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 120591 states and 138629 transitions. [2018-09-18 10:12:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-09-18 10:12:51,234 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:51,234 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:12:51,234 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1746104119, now seen corresponding path program 1 times [2018-09-18 10:12:51,235 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:51,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:51,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:51,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:51,236 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:51,869 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 10:12:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:12:52,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:52,009 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:52,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:52,020 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:52,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 90 proven. 108 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-18 10:12:52,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-18 10:12:52,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:52,902 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:12:52,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:52,919 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:53,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-18 10:12:53,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-18 10:12:53,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:12:53,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 6, 4] total 12 [2018-09-18 10:12:53,737 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:12:53,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:12:53,737 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:12:53,738 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:12:53,738 INFO L87 Difference]: Start difference. First operand 120591 states and 138629 transitions. Second operand 9 states. [2018-09-18 10:13:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:01,748 INFO L93 Difference]: Finished difference Result 267270 states and 322079 transitions. [2018-09-18 10:13:01,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-18 10:13:01,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 331 [2018-09-18 10:13:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:02,195 INFO L225 Difference]: With dead ends: 267270 [2018-09-18 10:13:02,195 INFO L226 Difference]: Without dead ends: 150688 [2018-09-18 10:13:02,319 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1373 GetRequests, 1340 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2018-09-18 10:13:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150688 states. [2018-09-18 10:13:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150688 to 144598. [2018-09-18 10:13:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144598 states. [2018-09-18 10:13:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144598 states to 144598 states and 166264 transitions. [2018-09-18 10:13:05,798 INFO L78 Accepts]: Start accepts. Automaton has 144598 states and 166264 transitions. Word has length 331 [2018-09-18 10:13:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:05,798 INFO L480 AbstractCegarLoop]: Abstraction has 144598 states and 166264 transitions. [2018-09-18 10:13:05,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:13:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 144598 states and 166264 transitions. [2018-09-18 10:13:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-18 10:13:05,881 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:05,881 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:13:05,881 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1906676144, now seen corresponding path program 1 times [2018-09-18 10:13:05,882 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:05,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:05,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:05,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:05,883 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:06,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:06,241 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:13:06,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:06,248 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:06,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:06,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:06,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:06,751 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:13:06,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:06,768 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:07,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:07,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:07,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:13:07,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 7 [2018-09-18 10:13:07,466 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:13:07,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:13:07,467 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:13:07,467 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:13:07,468 INFO L87 Difference]: Start difference. First operand 144598 states and 166264 transitions. Second operand 6 states. [2018-09-18 10:13:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:13,726 INFO L93 Difference]: Finished difference Result 421456 states and 506864 transitions. [2018-09-18 10:13:13,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:13:13,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2018-09-18 10:13:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:14,774 INFO L225 Difference]: With dead ends: 421456 [2018-09-18 10:13:14,775 INFO L226 Difference]: Without dead ends: 288719 [2018-09-18 10:13:15,023 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1358 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:13:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288719 states. [2018-09-18 10:13:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288719 to 281894. [2018-09-18 10:13:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281894 states. [2018-09-18 10:13:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281894 states to 281894 states and 323645 transitions. [2018-09-18 10:13:22,445 INFO L78 Accepts]: Start accepts. Automaton has 281894 states and 323645 transitions. Word has length 340 [2018-09-18 10:13:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:22,445 INFO L480 AbstractCegarLoop]: Abstraction has 281894 states and 323645 transitions. [2018-09-18 10:13:22,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:13:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 281894 states and 323645 transitions. [2018-09-18 10:13:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-09-18 10:13:22,641 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:22,641 INFO L376 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:13:22,641 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:22,642 INFO L82 PathProgramCache]: Analyzing trace with hash -32469061, now seen corresponding path program 1 times [2018-09-18 10:13:22,642 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:22,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:22,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:22,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:22,643 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 216 proven. 14 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-18 10:13:23,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:23,043 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:13:23,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:23,052 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:23,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-09-18 10:13:23,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 199 proven. 109 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 10:13:23,824 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:13:23,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-09-18 10:13:23,824 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:13:23,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:13:23,825 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:13:23,825 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:13:23,825 INFO L87 Difference]: Start difference. First operand 281894 states and 323645 transitions. Second operand 6 states. [2018-09-18 10:13:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:32,739 INFO L93 Difference]: Finished difference Result 541331 states and 619937 transitions. [2018-09-18 10:13:32,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:13:32,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 385 [2018-09-18 10:13:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:33,625 INFO L225 Difference]: With dead ends: 541331 [2018-09-18 10:13:33,625 INFO L226 Difference]: Without dead ends: 285783 [2018-09-18 10:13:33,942 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 762 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:13:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285783 states. [2018-09-18 10:13:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285783 to 282052. [2018-09-18 10:13:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282052 states. [2018-09-18 10:13:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282052 states to 282052 states and 323600 transitions. [2018-09-18 10:13:40,721 INFO L78 Accepts]: Start accepts. Automaton has 282052 states and 323600 transitions. Word has length 385 [2018-09-18 10:13:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:40,722 INFO L480 AbstractCegarLoop]: Abstraction has 282052 states and 323600 transitions. [2018-09-18 10:13:40,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:13:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 282052 states and 323600 transitions. [2018-09-18 10:13:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-18 10:13:40,935 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:40,935 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:13:40,935 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1141818105, now seen corresponding path program 1 times [2018-09-18 10:13:40,936 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:40,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:40,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:40,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:40,936 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 235 proven. 101 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-09-18 10:13:41,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:41,369 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:13:41,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:41,377 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:41,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 10:13:41,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 10:13:42,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:42,129 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 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:13:42,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:42,147 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:42,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 10:13:43,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 10:13:44,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:13:44,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-18 10:13:44,603 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:13:44,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:13:44,604 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:13:44,604 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:13:44,604 INFO L87 Difference]: Start difference. First operand 282052 states and 323600 transitions. Second operand 9 states. Received shutdown request... [2018-09-18 10:14:13,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-18 10:14:13,732 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:14:13,737 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:14:13,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:14:13 BoogieIcfgContainer [2018-09-18 10:14:13,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:14:13,738 INFO L168 Benchmark]: Toolchain (without parser) took 216170.77 ms. Allocated memory was 1.5 GB in the beginning and 5.2 GB in the end (delta: 3.7 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. [2018-09-18 10:14:13,740 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-09-18 10:14:13,740 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1229.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:14:13,741 INFO L168 Benchmark]: Boogie Procedure Inliner took 157.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:14:13,741 INFO L168 Benchmark]: Boogie Preprocessor took 382.33 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 813.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -935.9 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-18 10:14:13,742 INFO L168 Benchmark]: RCFGBuilder took 5208.57 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 257.1 MB). Peak memory consumption was 257.1 MB. Max. memory is 7.1 GB. [2018-09-18 10:14:13,743 INFO L168 Benchmark]: TraceAbstraction took 209181.82 ms. Allocated memory was 2.4 GB in the beginning and 5.2 GB in the end (delta: 2.8 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -958.9 MB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. [2018-09-18 10:14:13,747 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1229.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 157.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 382.33 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 813.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -935.9 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5208.57 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 257.1 MB). Peak memory consumption was 257.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209181.82 ms. Allocated memory was 2.4 GB in the beginning and 5.2 GB in the end (delta: 2.8 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -958.9 MB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1524]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1524). Cancelled while BasicCegarLoop was constructing difference of abstraction (282052states) and FLOYD_HOARE automaton (currently 40 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (1057577 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 209.0s OverallTime, 19 OverallIterations, 5 TraceHistogramMax, 136.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5108 SDtfs, 27206 SDslu, 6453 SDs, 0 SdLazy, 49486 SolverSat, 9742 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12718 GetRequests, 12307 SyntacticMatches, 30 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5867 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=282052occurred in iteration=18, 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: 42.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 39848 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 6.4s SatisfiabilityAnalysisTime, 19.4s InterpolantComputationTime, 10958 NumberOfCodeBlocks, 10958 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 17023 ConstructedInterpolants, 0 QuantifiedInterpolants, 13638025 SizeOfPredicates, 81 NumberOfNonLiveVariables, 24886 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 61 InterpolantComputations, 14 PerfectInterpolantSequences, 8292/9440 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/Problem03_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-14-13-761.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-14-13-761.csv Completed graceful shutdown