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_label07_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:00:08,708 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:00:08,710 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:00:08,722 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:00:08,723 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:00:08,724 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:00:08,725 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:00:08,727 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:00:08,729 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:00:08,730 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:00:08,731 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:00:08,731 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:00:08,732 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:00:08,733 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:00:08,734 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:00:08,735 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:00:08,736 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:00:08,738 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:00:08,740 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:00:08,741 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:00:08,742 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:00:08,744 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:00:08,746 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-14 16:00:08,752 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:00:08,753 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:00:08,754 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:00:08,754 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:00:08,755 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:00:08,770 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:00:08,770 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:00:08,771 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:00:08,771 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:00:08,771 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:00:08,772 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:00:08,772 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:00:08,772 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:00:08,772 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:00:08,773 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:00:08,773 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:00:08,773 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:00:08,774 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:00:08,774 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:00:08,774 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:00:08,774 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:00:08,774 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:00:08,775 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:00:08,775 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:00:08,775 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:00:08,775 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:00:08,775 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:00:08,776 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:00:08,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:08,776 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:00:08,776 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:00:08,776 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:00:08,777 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:00:08,777 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:00:08,777 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:00:08,777 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:00:08,778 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:00:08,778 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:00:08,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:00:08,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:00:08,856 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:00:08,858 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:00:08,858 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:00:08,859 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c [2018-09-14 16:00:09,238 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2355e8d7a/73907c08cff645bd9eaf3381703c4108/FLAG4e9dc7d48 [2018-09-14 16:00:09,650 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:00:09,650 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c [2018-09-14 16:00:09,667 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2355e8d7a/73907c08cff645bd9eaf3381703c4108/FLAG4e9dc7d48 [2018-09-14 16:00:09,687 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2355e8d7a/73907c08cff645bd9eaf3381703c4108 [2018-09-14 16:00:09,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:00:09,702 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:00:09,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:09,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:00:09,710 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:00:09,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:09" (1/1) ... [2018-09-14 16:00:09,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201dfe03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:09, skipping insertion in model container [2018-09-14 16:00:09,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:09" (1/1) ... [2018-09-14 16:00:09,727 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:00:10,454 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:10,473 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:00:10,772 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:10,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10 WrapperNode [2018-09-14 16:00:10,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:10,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:10,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:00:10,855 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:00:10,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:10,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:11,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:00:11,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:00:11,039 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:00:11,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... [2018-09-14 16:00:11,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:00:11,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:00:11,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:00:11,417 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:00:11,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:11,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:00:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:00:11,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:00:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:00:11,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:00:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:00:11,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:00:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:00:16,539 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:00:16,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:16 BoogieIcfgContainer [2018-09-14 16:00:16,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:00:16,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:00:16,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:00:16,545 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:00:16,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:00:09" (1/3) ... [2018-09-14 16:00:16,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:16, skipping insertion in model container [2018-09-14 16:00:16,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:10" (2/3) ... [2018-09-14 16:00:16,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:16, skipping insertion in model container [2018-09-14 16:00:16,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:16" (3/3) ... [2018-09-14 16:00:16,550 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label07_true-unreach-call.c [2018-09-14 16:00:16,560 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:00:16,570 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:00:16,630 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:00:16,631 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:00:16,631 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:00:16,631 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:00:16,631 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:00:16,632 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:00:16,632 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:00:16,632 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:00:16,632 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:00:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:00:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-14 16:00:16,683 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:16,684 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:16,685 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:16,690 INFO L82 PathProgramCache]: Analyzing trace with hash -98541652, now seen corresponding path program 1 times [2018-09-14 16:00:16,692 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:16,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:16,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:16,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:16,745 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:17,647 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:17,843 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:17,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:17,844 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:17,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:17,866 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:17,867 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:17,870 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:00:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:20,187 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-09-14 16:00:20,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:20,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2018-09-14 16:00:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:20,215 INFO L225 Difference]: With dead ends: 845 [2018-09-14 16:00:20,216 INFO L226 Difference]: Without dead ends: 531 [2018-09-14 16:00:20,224 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 [2018-09-14 16:00:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-14 16:00:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-09-14 16:00:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-09-14 16:00:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-09-14 16:00:20,330 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 179 [2018-09-14 16:00:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:20,332 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-09-14 16:00:20,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-09-14 16:00:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-14 16:00:20,346 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:20,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:20,349 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2053173019, now seen corresponding path program 1 times [2018-09-14 16:00:20,349 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:20,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:20,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:20,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:20,351 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:20,687 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:20,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:20,687 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:20,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:20,689 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:20,690 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:20,690 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-09-14 16:00:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:24,333 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-09-14 16:00:24,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:00:24,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 189 [2018-09-14 16:00:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:24,347 INFO L225 Difference]: With dead ends: 1599 [2018-09-14 16:00:24,348 INFO L226 Difference]: Without dead ends: 1075 [2018-09-14 16:00:24,354 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-09-14 16:00:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-09-14 16:00:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-09-14 16:00:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-09-14 16:00:24,428 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 189 [2018-09-14 16:00:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:24,428 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-09-14 16:00:24,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:00:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-09-14 16:00:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-14 16:00:24,433 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:24,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:24,435 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1275531176, now seen corresponding path program 1 times [2018-09-14 16:00:24,436 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:24,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:24,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:24,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:24,438 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:24,845 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:24,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:24,845 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:24,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:24,846 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:24,846 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:24,847 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-09-14 16:00:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:27,795 INFO L93 Difference]: Finished difference Result 2912 states and 4936 transitions. [2018-09-14 16:00:27,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:27,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2018-09-14 16:00:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:27,808 INFO L225 Difference]: With dead ends: 2912 [2018-09-14 16:00:27,808 INFO L226 Difference]: Without dead ends: 1884 [2018-09-14 16:00:27,813 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 [2018-09-14 16:00:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-14 16:00:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1881. [2018-09-14 16:00:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1881 states. [2018-09-14 16:00:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2981 transitions. [2018-09-14 16:00:27,875 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2981 transitions. Word has length 192 [2018-09-14 16:00:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:27,876 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2981 transitions. [2018-09-14 16:00:27,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2981 transitions. [2018-09-14 16:00:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-14 16:00:27,883 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:27,884 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:27,884 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash -793960044, now seen corresponding path program 1 times [2018-09-14 16:00:27,885 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:27,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:27,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:27,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:27,886 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:28,356 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:28,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-14 16:00:28,356 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:28,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:00:28,357 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:00:28,357 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:28,358 INFO L87 Difference]: Start difference. First operand 1881 states and 2981 transitions. Second operand 7 states. [2018-09-14 16:00:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:30,748 INFO L93 Difference]: Finished difference Result 5729 states and 9791 transitions. [2018-09-14 16:00:30,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:00:30,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2018-09-14 16:00:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:30,787 INFO L225 Difference]: With dead ends: 5729 [2018-09-14 16:00:30,788 INFO L226 Difference]: Without dead ends: 3854 [2018-09-14 16:00:30,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2018-09-14 16:00:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3744. [2018-09-14 16:00:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3744 states. [2018-09-14 16:00:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 6108 transitions. [2018-09-14 16:00:31,014 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 6108 transitions. Word has length 198 [2018-09-14 16:00:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:31,014 INFO L480 AbstractCegarLoop]: Abstraction has 3744 states and 6108 transitions. [2018-09-14 16:00:31,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:00:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 6108 transitions. [2018-09-14 16:00:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-09-14 16:00:31,029 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:31,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:31,030 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash -460153767, now seen corresponding path program 1 times [2018-09-14 16:00:31,030 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:31,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:31,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:31,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:31,031 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:31,304 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:31,366 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:31,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:31,366 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:31,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:31,367 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:31,367 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:31,368 INFO L87 Difference]: Start difference. First operand 3744 states and 6108 transitions. Second operand 6 states. [2018-09-14 16:00:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:33,570 INFO L93 Difference]: Finished difference Result 8125 states and 13602 transitions. [2018-09-14 16:00:33,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:00:33,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 199 [2018-09-14 16:00:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:33,594 INFO L225 Difference]: With dead ends: 8125 [2018-09-14 16:00:33,594 INFO L226 Difference]: Without dead ends: 4387 [2018-09-14 16:00:33,610 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2018-09-14 16:00:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4215. [2018-09-14 16:00:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2018-09-14 16:00:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6296 transitions. [2018-09-14 16:00:33,732 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6296 transitions. Word has length 199 [2018-09-14 16:00:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:33,733 INFO L480 AbstractCegarLoop]: Abstraction has 4215 states and 6296 transitions. [2018-09-14 16:00:33,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:00:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6296 transitions. [2018-09-14 16:00:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-14 16:00:33,745 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:33,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:33,745 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:33,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1629605729, now seen corresponding path program 1 times [2018-09-14 16:00:33,746 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:33,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:33,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:33,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:33,747 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:33,982 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:34,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:34,181 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:00:34,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:34,199 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:34,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:00:34,624 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:00:35,104 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:00:35,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-09-14 16:00:35,104 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:35,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:35,105 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:35,105 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:35,106 INFO L87 Difference]: Start difference. First operand 4215 states and 6296 transitions. Second operand 3 states. [2018-09-14 16:00:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:36,356 INFO L93 Difference]: Finished difference Result 8422 states and 12588 transitions. [2018-09-14 16:00:36,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:36,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-09-14 16:00:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:36,376 INFO L225 Difference]: With dead ends: 8422 [2018-09-14 16:00:36,377 INFO L226 Difference]: Without dead ends: 4213 [2018-09-14 16:00:36,387 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2018-09-14 16:00:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4213. [2018-09-14 16:00:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4213 states. [2018-09-14 16:00:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 6292 transitions. [2018-09-14 16:00:36,497 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 6292 transitions. Word has length 203 [2018-09-14 16:00:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:36,498 INFO L480 AbstractCegarLoop]: Abstraction has 4213 states and 6292 transitions. [2018-09-14 16:00:36,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 6292 transitions. [2018-09-14 16:00:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-14 16:00:36,511 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:36,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:36,511 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1141340529, now seen corresponding path program 1 times [2018-09-14 16:00:36,512 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:36,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:36,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:36,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:36,513 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:36,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:36,963 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 [2018-09-14 16:00:36,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:36,978 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:37,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:37,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:37,899 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:00:37,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:00:37,899 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:37,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:37,901 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:37,901 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:37,901 INFO L87 Difference]: Start difference. First operand 4213 states and 6292 transitions. Second operand 3 states. [2018-09-14 16:00:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:40,346 INFO L93 Difference]: Finished difference Result 12317 states and 18981 transitions. [2018-09-14 16:00:40,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:40,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-09-14 16:00:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:40,396 INFO L225 Difference]: With dead ends: 12317 [2018-09-14 16:00:40,396 INFO L226 Difference]: Without dead ends: 8110 [2018-09-14 16:00:40,411 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8110 states. [2018-09-14 16:00:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8110 to 7965. [2018-09-14 16:00:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7965 states. [2018-09-14 16:00:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 12011 transitions. [2018-09-14 16:00:40,655 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 12011 transitions. Word has length 210 [2018-09-14 16:00:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:40,656 INFO L480 AbstractCegarLoop]: Abstraction has 7965 states and 12011 transitions. [2018-09-14 16:00:40,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 12011 transitions. [2018-09-14 16:00:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-14 16:00:40,680 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:40,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:40,681 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1037923925, now seen corresponding path program 1 times [2018-09-14 16:00:40,681 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:40,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:40,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:40,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:40,683 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:41,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:41,142 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:00:41,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:41,158 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:41,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:41,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:41,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:41,940 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:00:41,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:41,972 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:42,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:42,660 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:43,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:00:43,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 18 [2018-09-14 16:00:43,086 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:00:43,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:00:43,087 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:00:43,087 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:00:43,088 INFO L87 Difference]: Start difference. First operand 7965 states and 12011 transitions. Second operand 9 states. [2018-09-14 16:00:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:56,817 INFO L93 Difference]: Finished difference Result 66058 states and 136488 transitions. [2018-09-14 16:00:56,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-14 16:00:56,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2018-09-14 16:00:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:57,256 INFO L225 Difference]: With dead ends: 66058 [2018-09-14 16:00:57,257 INFO L226 Difference]: Without dead ends: 58099 [2018-09-14 16:00:57,419 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 864 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2018-09-14 16:00:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58099 states. [2018-09-14 16:00:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58099 to 55162. [2018-09-14 16:00:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55162 states. [2018-09-14 16:01:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55162 states to 55162 states and 79096 transitions. [2018-09-14 16:01:00,118 INFO L78 Accepts]: Start accepts. Automaton has 55162 states and 79096 transitions. Word has length 212 [2018-09-14 16:01:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:00,119 INFO L480 AbstractCegarLoop]: Abstraction has 55162 states and 79096 transitions. [2018-09-14 16:01:00,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:01:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 55162 states and 79096 transitions. [2018-09-14 16:01:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-14 16:01:00,240 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:00,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:00,241 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash 874437380, now seen corresponding path program 1 times [2018-09-14 16:01:00,241 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:00,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:00,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:00,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:00,242 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:00,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:00,718 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:00,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:00,735 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:00,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:01,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:01,503 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:01:01,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-14 16:01:01,503 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:01,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:01:01,504 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:01:01,505 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:01:01,505 INFO L87 Difference]: Start difference. First operand 55162 states and 79096 transitions. Second operand 3 states. [2018-09-14 16:01:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:04,168 INFO L93 Difference]: Finished difference Result 107758 states and 153453 transitions. [2018-09-14 16:01:04,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:01:04,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2018-09-14 16:01:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:04,440 INFO L225 Difference]: With dead ends: 107758 [2018-09-14 16:01:04,441 INFO L226 Difference]: Without dead ends: 65980 [2018-09-14 16:01:04,557 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:01:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65980 states. [2018-09-14 16:01:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65980 to 64455. [2018-09-14 16:01:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64455 states. [2018-09-14 16:01:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64455 states to 64455 states and 91904 transitions. [2018-09-14 16:01:06,752 INFO L78 Accepts]: Start accepts. Automaton has 64455 states and 91904 transitions. Word has length 217 [2018-09-14 16:01:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:06,753 INFO L480 AbstractCegarLoop]: Abstraction has 64455 states and 91904 transitions. [2018-09-14 16:01:06,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:01:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 64455 states and 91904 transitions. [2018-09-14 16:01:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-14 16:01:06,841 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:06,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:06,842 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1937547137, now seen corresponding path program 1 times [2018-09-14 16:01:06,842 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:06,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:06,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:06,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:06,843 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:07,127 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:01:07,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:01:07,127 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:07,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:01:07,128 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:01:07,128 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:01:07,128 INFO L87 Difference]: Start difference. First operand 64455 states and 91904 transitions. Second operand 6 states. [2018-09-14 16:01:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:09,564 INFO L93 Difference]: Finished difference Result 126056 states and 182154 transitions. [2018-09-14 16:01:09,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:01:09,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 243 [2018-09-14 16:01:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:09,783 INFO L225 Difference]: With dead ends: 126056 [2018-09-14 16:01:09,783 INFO L226 Difference]: Without dead ends: 61642 [2018-09-14 16:01:09,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:01:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61642 states. [2018-09-14 16:01:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61642 to 60920. [2018-09-14 16:01:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60920 states. [2018-09-14 16:01:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60920 states to 60920 states and 79562 transitions. [2018-09-14 16:01:12,128 INFO L78 Accepts]: Start accepts. Automaton has 60920 states and 79562 transitions. Word has length 243 [2018-09-14 16:01:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:12,128 INFO L480 AbstractCegarLoop]: Abstraction has 60920 states and 79562 transitions. [2018-09-14 16:01:12,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:01:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 60920 states and 79562 transitions. [2018-09-14 16:01:12,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-14 16:01:12,195 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:12,195 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:12,196 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1140594647, now seen corresponding path program 1 times [2018-09-14 16:01:12,196 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:12,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:12,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:12,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:12,198 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:01:12,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:12,740 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 [2018-09-14 16:01:12,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:12,755 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:12,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:13,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:13,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:13,836 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 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:01:13,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:13,856 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:14,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:14,553 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:14,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:14,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:01:14,663 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:14,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:01:14,665 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:01:14,665 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:01:14,666 INFO L87 Difference]: Start difference. First operand 60920 states and 79562 transitions. Second operand 9 states. [2018-09-14 16:01:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:20,855 INFO L93 Difference]: Finished difference Result 236517 states and 325555 transitions. [2018-09-14 16:01:20,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:01:20,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2018-09-14 16:01:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:21,463 INFO L225 Difference]: With dead ends: 236517 [2018-09-14 16:01:21,464 INFO L226 Difference]: Without dead ends: 175673 [2018-09-14 16:01:21,618 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 977 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-14 16:01:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175673 states. [2018-09-14 16:01:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175673 to 174433. [2018-09-14 16:01:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174433 states. [2018-09-14 16:01:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174433 states to 174433 states and 226147 transitions. [2018-09-14 16:01:26,232 INFO L78 Accepts]: Start accepts. Automaton has 174433 states and 226147 transitions. Word has length 246 [2018-09-14 16:01:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:26,232 INFO L480 AbstractCegarLoop]: Abstraction has 174433 states and 226147 transitions. [2018-09-14 16:01:26,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:01:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 174433 states and 226147 transitions. [2018-09-14 16:01:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-14 16:01:26,309 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:26,310 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:26,310 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:26,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1067592758, now seen corresponding path program 1 times [2018-09-14 16:01:26,311 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:26,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:26,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:26,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:26,312 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:26,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:26,572 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:26,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:26,580 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:26,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:26,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:26,930 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:01:26,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:01:26,931 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:26,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:01:26,931 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:01:26,932 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:01:26,932 INFO L87 Difference]: Start difference. First operand 174433 states and 226147 transitions. Second operand 3 states. [2018-09-14 16:01:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:31,562 INFO L93 Difference]: Finished difference Result 298333 states and 389262 transitions. [2018-09-14 16:01:31,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:01:31,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2018-09-14 16:01:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:32,139 INFO L225 Difference]: With dead ends: 298333 [2018-09-14 16:01:32,140 INFO L226 Difference]: Without dead ends: 152992 [2018-09-14 16:01:32,468 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 500 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:01:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152992 states. [2018-09-14 16:01:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152992 to 143492. [2018-09-14 16:01:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143492 states. [2018-09-14 16:01:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143492 states to 143492 states and 179586 transitions. [2018-09-14 16:01:36,547 INFO L78 Accepts]: Start accepts. Automaton has 143492 states and 179586 transitions. Word has length 251 [2018-09-14 16:01:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:36,548 INFO L480 AbstractCegarLoop]: Abstraction has 143492 states and 179586 transitions. [2018-09-14 16:01:36,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:01:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 143492 states and 179586 transitions. [2018-09-14 16:01:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-09-14 16:01:36,696 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:36,696 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:01:36,696 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1011944805, now seen corresponding path program 1 times [2018-09-14 16:01:36,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:36,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:36,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:36,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:36,698 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:37,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:37,333 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:37,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:37,346 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:37,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-14 16:01:37,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-14 16:01:42,570 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:01:42,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:01:42,571 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:42,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:01:42,571 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:01:42,571 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:01:42,572 INFO L87 Difference]: Start difference. First operand 143492 states and 179586 transitions. Second operand 3 states. [2018-09-14 16:01:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:44,975 INFO L93 Difference]: Finished difference Result 240130 states and 298374 transitions. [2018-09-14 16:01:44,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:01:44,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2018-09-14 16:01:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:45,383 INFO L225 Difference]: With dead ends: 240130 [2018-09-14 16:01:45,383 INFO L226 Difference]: Without dead ends: 133383 [2018-09-14 16:01:45,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 632 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:01:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133383 states. [2018-09-14 16:01:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133383 to 130535. [2018-09-14 16:01:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130535 states. [2018-09-14 16:01:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130535 states to 130535 states and 163805 transitions. [2018-09-14 16:01:47,981 INFO L78 Accepts]: Start accepts. Automaton has 130535 states and 163805 transitions. Word has length 317 [2018-09-14 16:01:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:47,982 INFO L480 AbstractCegarLoop]: Abstraction has 130535 states and 163805 transitions. [2018-09-14 16:01:47,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:01:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 130535 states and 163805 transitions. [2018-09-14 16:01:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-14 16:01:48,580 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:48,581 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:48,581 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1576646578, now seen corresponding path program 1 times [2018-09-14 16:01:48,581 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:48,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:48,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:48,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:48,582 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:49,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:49,264 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:49,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:49,273 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:49,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:49,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:49,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:49,672 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:01:49,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:49,689 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:50,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:01:50,308 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:01:50,786 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-14 16:01:50,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 12 [2018-09-14 16:01:50,787 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:50,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:01:50,787 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:01:50,788 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:01:50,788 INFO L87 Difference]: Start difference. First operand 130535 states and 163805 transitions. Second operand 5 states. [2018-09-14 16:01:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:55,056 INFO L93 Difference]: Finished difference Result 277115 states and 357201 transitions. [2018-09-14 16:01:55,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:01:55,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2018-09-14 16:01:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:55,737 INFO L225 Difference]: With dead ends: 277115 [2018-09-14 16:01:55,738 INFO L226 Difference]: Without dead ends: 146691 [2018-09-14 16:01:56,015 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1317 GetRequests, 1304 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:01:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146691 states. [2018-09-14 16:01:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146691 to 141184. [2018-09-14 16:01:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141184 states. [2018-09-14 16:01:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141184 states to 141184 states and 175431 transitions. [2018-09-14 16:01:59,078 INFO L78 Accepts]: Start accepts. Automaton has 141184 states and 175431 transitions. Word has length 328 [2018-09-14 16:01:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:59,078 INFO L480 AbstractCegarLoop]: Abstraction has 141184 states and 175431 transitions. [2018-09-14 16:01:59,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:01:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 141184 states and 175431 transitions. [2018-09-14 16:01:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-14 16:01:59,225 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:59,226 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:01:59,226 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash 155426270, now seen corresponding path program 1 times [2018-09-14 16:01:59,226 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:59,227 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 178 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 16:01:59,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:59,683 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:00,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:00,453 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:00,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:01,345 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 16:02:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 16:02:01,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:01,714 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-14 16:02:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 16:02:02,315 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:02:02,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 10 [2018-09-14 16:02:02,316 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:02:02,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:02:02,317 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:02:02,317 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:02:02,318 INFO L87 Difference]: Start difference. First operand 141184 states and 175431 transitions. Second operand 5 states. [2018-09-14 16:02:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:06,579 INFO L93 Difference]: Finished difference Result 271984 states and 336905 transitions. [2018-09-14 16:02:06,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:02:06,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 348 [2018-09-14 16:02:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:07,039 INFO L225 Difference]: With dead ends: 271984 [2018-09-14 16:02:07,039 INFO L226 Difference]: Without dead ends: 179535 [2018-09-14 16:02:07,124 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 687 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:02:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179535 states. [2018-09-14 16:02:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179535 to 173454. [2018-09-14 16:02:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173454 states. [2018-09-14 16:02:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173454 states to 173454 states and 216878 transitions. [2018-09-14 16:02:10,633 INFO L78 Accepts]: Start accepts. Automaton has 173454 states and 216878 transitions. Word has length 348 [2018-09-14 16:02:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:10,633 INFO L480 AbstractCegarLoop]: Abstraction has 173454 states and 216878 transitions. [2018-09-14 16:02:10,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:02:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 173454 states and 216878 transitions. [2018-09-14 16:02:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-14 16:02:10,830 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:10,830 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:02:10,830 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash 584790789, now seen corresponding path program 1 times [2018-09-14 16:02:10,831 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:10,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:10,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:10,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:10,832 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 195 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-14 16:02:11,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:11,154 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:11,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:11,163 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:11,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-14 16:02:11,716 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 172 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-14 16:02:11,983 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:02:11,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-09-14 16:02:11,983 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:02:11,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:02:11,984 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:02:11,984 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:02:11,984 INFO L87 Difference]: Start difference. First operand 173454 states and 216878 transitions. Second operand 6 states. [2018-09-14 16:02:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:16,646 INFO L93 Difference]: Finished difference Result 355868 states and 443863 transitions. [2018-09-14 16:02:16,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:02:16,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 362 [2018-09-14 16:02:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:17,266 INFO L225 Difference]: With dead ends: 355868 [2018-09-14 16:02:17,266 INFO L226 Difference]: Without dead ends: 180576 [2018-09-14 16:02:17,515 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 716 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:02:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180576 states. [2018-09-14 16:02:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180576 to 176250. [2018-09-14 16:02:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176250 states. [2018-09-14 16:02:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176250 states to 176250 states and 219107 transitions. [2018-09-14 16:02:21,605 INFO L78 Accepts]: Start accepts. Automaton has 176250 states and 219107 transitions. Word has length 362 [2018-09-14 16:02:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:21,606 INFO L480 AbstractCegarLoop]: Abstraction has 176250 states and 219107 transitions. [2018-09-14 16:02:21,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:02:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 176250 states and 219107 transitions. [2018-09-14 16:02:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-09-14 16:02:21,827 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:21,827 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:02:21,827 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash 528736920, now seen corresponding path program 1 times [2018-09-14 16:02:21,828 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:21,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:21,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:21,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:21,829 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 176 proven. 90 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-14 16:02:23,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:23,350 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:23,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:23,357 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:23,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-14 16:02:23,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 176 proven. 90 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-14 16:02:23,887 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:02:23,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:02:23,888 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:02:23,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:02:23,888 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:02:23,889 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:02:23,889 INFO L87 Difference]: Start difference. First operand 176250 states and 219107 transitions. Second operand 5 states. [2018-09-14 16:02:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:32,513 INFO L93 Difference]: Finished difference Result 413471 states and 515201 transitions. [2018-09-14 16:02:32,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:02:32,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 364 [2018-09-14 16:02:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:33,094 INFO L225 Difference]: With dead ends: 413471 [2018-09-14 16:02:33,094 INFO L226 Difference]: Without dead ends: 237247 [2018-09-14 16:02:33,254 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 723 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:02:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237247 states. [2018-09-14 16:02:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237247 to 216367. [2018-09-14 16:02:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216367 states. [2018-09-14 16:02:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216367 states to 216367 states and 269288 transitions. [2018-09-14 16:02:37,256 INFO L78 Accepts]: Start accepts. Automaton has 216367 states and 269288 transitions. Word has length 364 [2018-09-14 16:02:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:37,256 INFO L480 AbstractCegarLoop]: Abstraction has 216367 states and 269288 transitions. [2018-09-14 16:02:37,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:02:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 216367 states and 269288 transitions. [2018-09-14 16:02:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-09-14 16:02:37,451 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:37,452 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:02:37,452 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:37,452 INFO L82 PathProgramCache]: Analyzing trace with hash 450971707, now seen corresponding path program 1 times [2018-09-14 16:02:37,452 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:37,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:37,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:37,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:37,453 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 232 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 16:02:38,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:38,088 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 [2018-09-14 16:02:38,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:38,096 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:38,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 258 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 16:02:39,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 232 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 16:02:39,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:39,572 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 [2018-09-14 16:02:39,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:39,588 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:40,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 258 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 16:02:40,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 232 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-14 16:02:40,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:40,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 7 [2018-09-14 16:02:40,431 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:40,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:02:40,432 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:02:40,432 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:02:40,432 INFO L87 Difference]: Start difference. First operand 216367 states and 269288 transitions. Second operand 6 states. [2018-09-14 16:02:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:46,936 INFO L93 Difference]: Finished difference Result 407561 states and 525520 transitions. [2018-09-14 16:02:46,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:02:46,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 365 [2018-09-14 16:02:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:47,590 INFO L225 Difference]: With dead ends: 407561 [2018-09-14 16:02:47,590 INFO L226 Difference]: Without dead ends: 193779 [2018-09-14 16:02:47,831 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1470 GetRequests, 1458 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:02:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193779 states. [2018-09-14 16:02:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193779 to 176624. [2018-09-14 16:02:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176624 states. [2018-09-14 16:02:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176624 states to 176624 states and 211531 transitions. [2018-09-14 16:02:51,793 INFO L78 Accepts]: Start accepts. Automaton has 176624 states and 211531 transitions. Word has length 365 [2018-09-14 16:02:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:51,793 INFO L480 AbstractCegarLoop]: Abstraction has 176624 states and 211531 transitions. [2018-09-14 16:02:51,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:02:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 176624 states and 211531 transitions. [2018-09-14 16:02:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-14 16:02:51,952 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:51,952 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:51,952 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1185382395, now seen corresponding path program 1 times [2018-09-14 16:02:51,953 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:51,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:51,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:51,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:51,954 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 199 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:53,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:53,535 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 [2018-09-14 16:02:53,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:53,546 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:53,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 264 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:02:54,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 203 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:02:54,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:54,715 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 [2018-09-14 16:02:54,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:54,731 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:55,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 194 proven. 22 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-14 16:02:55,810 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:55,981 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-09-14 16:02:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 202 proven. 14 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-14 16:02:57,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:57,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8, 8, 8] total 28 [2018-09-14 16:02:57,124 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:57,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-14 16:02:57,125 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-14 16:02:57,125 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2018-09-14 16:02:57,125 INFO L87 Difference]: Start difference. First operand 176624 states and 211531 transitions. Second operand 18 states. [2018-09-14 16:03:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:20,973 INFO L93 Difference]: Finished difference Result 560804 states and 689727 transitions. [2018-09-14 16:03:20,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-14 16:03:20,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 380 [2018-09-14 16:03:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:22,281 INFO L225 Difference]: With dead ends: 560804 [2018-09-14 16:03:22,282 INFO L226 Difference]: Without dead ends: 388919 [2018-09-14 16:03:23,249 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1633 GetRequests, 1500 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5761 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2614, Invalid=13642, Unknown=0, NotChecked=0, Total=16256 [2018-09-14 16:03:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388919 states. [2018-09-14 16:03:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388919 to 375271. [2018-09-14 16:03:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375271 states. [2018-09-14 16:03:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375271 states to 375271 states and 453755 transitions. [2018-09-14 16:03:30,974 INFO L78 Accepts]: Start accepts. Automaton has 375271 states and 453755 transitions. Word has length 380 [2018-09-14 16:03:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:30,975 INFO L480 AbstractCegarLoop]: Abstraction has 375271 states and 453755 transitions. [2018-09-14 16:03:30,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-14 16:03:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 375271 states and 453755 transitions. [2018-09-14 16:03:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-09-14 16:03:31,243 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:31,243 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:03:31,243 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash -217036829, now seen corresponding path program 1 times [2018-09-14 16:03:31,244 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:31,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:31,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:31,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:31,245 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:31,730 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-09-14 16:03:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 195 proven. 95 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-14 16:03:31,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:31,922 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 [2018-09-14 16:03:31,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:31,931 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:32,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-14 16:03:32,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:32,725 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2018-09-14 16:03:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 195 proven. 95 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-14 16:03:34,144 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:03:34,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:03:34,144 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:34,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:03:34,145 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:03:34,145 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:03:34,146 INFO L87 Difference]: Start difference. First operand 375271 states and 453755 transitions. Second operand 5 states. Received shutdown request... [2018-09-14 16:03:45,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:03:45,449 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:03:45,455 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:03:45,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:03:45 BoogieIcfgContainer [2018-09-14 16:03:45,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:03:45,457 INFO L168 Benchmark]: Toolchain (without parser) took 215757.18 ms. Allocated memory was 1.5 GB in the beginning and 5.7 GB in the end (delta: 4.1 GB). Free memory was 1.4 GB in the beginning and 4.5 GB in the end (delta: -3.1 GB). Peak memory consumption was 4.7 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:45,457 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:03:45,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1151.06 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:45,459 INFO L168 Benchmark]: Boogie Procedure Inliner took 183.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 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. [2018-09-14 16:03:45,459 INFO L168 Benchmark]: Boogie Preprocessor took 377.76 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -939.6 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:45,460 INFO L168 Benchmark]: RCFGBuilder took 5123.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 254.4 MB). Peak memory consumption was 254.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:45,461 INFO L168 Benchmark]: TraceAbstraction took 208914.12 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.3 GB). Free memory was 2.0 GB in the beginning and 4.5 GB in the end (delta: -2.5 GB). Peak memory consumption was 4.5 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:45,465 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 1151.06 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 183.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 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 377.76 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -939.6 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5123.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 254.4 MB). Peak memory consumption was 254.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208914.12 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.3 GB). Free memory was 2.0 GB in the beginning and 4.5 GB in the end (delta: -2.5 GB). Peak memory consumption was 4.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1551]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1551). Cancelled while BasicCegarLoop was constructing difference of abstraction (375271states) and FLOYD_HOARE automaton (currently 8 states, 5 states before enhancement), while ReachableStatesComputation was computing reachable states (556879 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 208.8s OverallTime, 20 OverallIterations, 4 TraceHistogramMax, 122.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4175 SDtfs, 23711 SDslu, 4912 SDs, 0 SdLazy, 44046 SolverSat, 6058 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11746 GetRequests, 11392 SyntacticMatches, 41 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6499 ImplicationChecksByTransitivity, 19.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=375271occurred in iteration=19, 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: 45.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 86841 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 26.8s InterpolantComputationTime, 11103 NumberOfCodeBlocks, 11103 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 16762 ConstructedInterpolants, 0 QuantifiedInterpolants, 17949850 SizeOfPredicates, 81 NumberOfNonLiveVariables, 22873 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 58 InterpolantComputations, 23 PerfectInterpolantSequences, 8186/9008 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_label07_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-03-45-482.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label07_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-03-45-482.csv Completed graceful shutdown