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/Problem14_label45_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:40:21,061 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:40:21,063 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:40:21,087 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:40:21,087 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:40:21,088 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:40:21,089 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:40:21,091 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:40:21,093 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:40:21,094 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:40:21,095 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:40:21,095 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:40:21,096 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:40:21,099 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:40:21,104 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:40:21,105 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:40:21,108 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:40:21,110 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:40:21,115 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:40:21,120 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:40:21,121 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:40:21,125 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:40:21,127 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:40:21,127 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:40:21,129 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:40:21,130 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:40:21,134 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:40:21,134 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:40:21,135 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:40:21,136 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:40:21,137 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:40:21,138 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:40:21,141 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:40:21,142 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:40:21,143 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:40:21,144 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:40:21,145 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 17:40:21,166 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:40:21,167 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:40:21,168 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:40:21,168 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:40:21,168 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:40:21,168 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:40:21,168 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:40:21,169 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:40:21,169 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:40:21,169 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:40:21,169 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:40:21,170 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:40:21,170 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:40:21,170 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:40:21,171 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:40:21,171 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:40:21,171 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:40:21,171 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:40:21,171 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:40:21,172 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:40:21,172 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:40:21,172 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:40:21,172 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:40:21,172 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:40:21,173 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:40:21,173 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:40:21,173 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:40:21,173 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:40:21,173 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:40:21,174 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:40:21,174 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:40:21,174 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:40:21,174 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:40:21,226 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:40:21,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:40:21,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:40:21,250 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:40:21,250 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:40:21,251 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-09-14 17:40:21,614 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb027385b/07cfb8fcd1ee4457be83ef7eff024f76/FLAGfa08ecd7a [2018-09-14 17:40:21,941 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:40:21,942 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-09-14 17:40:21,960 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb027385b/07cfb8fcd1ee4457be83ef7eff024f76/FLAGfa08ecd7a [2018-09-14 17:40:21,975 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb027385b/07cfb8fcd1ee4457be83ef7eff024f76 [2018-09-14 17:40:21,985 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:40:21,987 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:40:21,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:40:21,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:40:21,995 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:40:21,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:40:21" (1/1) ... [2018-09-14 17:40:21,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64024991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:21, skipping insertion in model container [2018-09-14 17:40:22,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:40:21" (1/1) ... [2018-09-14 17:40:22,012 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:40:22,555 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:40:22,579 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:40:22,854 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:40:22,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22 WrapperNode [2018-09-14 17:40:22,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:40:22,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:40:22,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:40:22,906 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:40:22,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:22,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:40:23,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:40:23,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:40:23,049 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:40:23,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (1/1) ... [2018-09-14 17:40:23,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:40:23,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:40:23,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:40:23,329 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:40:23,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (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 17:40:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:40:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:40:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:40:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:40:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:40:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:40:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:40:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:40:27,115 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:40:27,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:40:27 BoogieIcfgContainer [2018-09-14 17:40:27,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:40:27,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:40:27,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:40:27,123 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:40:27,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:40:21" (1/3) ... [2018-09-14 17:40:27,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1d8a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:40:27, skipping insertion in model container [2018-09-14 17:40:27,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:40:22" (2/3) ... [2018-09-14 17:40:27,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1d8a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:40:27, skipping insertion in model container [2018-09-14 17:40:27,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:40:27" (3/3) ... [2018-09-14 17:40:27,128 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label45_true-unreach-call_false-termination.c [2018-09-14 17:40:27,138 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:40:27,146 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:40:27,206 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:40:27,207 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:40:27,207 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:40:27,207 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:40:27,207 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:40:27,208 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:40:27,210 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:40:27,210 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:40:27,210 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:40:27,238 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-14 17:40:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-14 17:40:27,248 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:40:27,249 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] [2018-09-14 17:40:27,250 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:40:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1525638783, now seen corresponding path program 1 times [2018-09-14 17:40:27,259 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:40:27,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:27,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:27,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:27,315 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:40:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:27,702 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 17:40:27,704 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:40:27,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:40:27,705 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:40:27,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:40:27,726 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:40:27,727 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:40:27,730 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-09-14 17:40:30,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:40:30,737 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-09-14 17:40:30,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:40:30,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-09-14 17:40:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:40:30,760 INFO L225 Difference]: With dead ends: 894 [2018-09-14 17:40:30,760 INFO L226 Difference]: Without dead ends: 633 [2018-09-14 17:40:30,768 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:40:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-09-14 17:40:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-09-14 17:40:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-14 17:40:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-09-14 17:40:30,854 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 43 [2018-09-14 17:40:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:40:30,854 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-09-14 17:40:30,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:40:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-09-14 17:40:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-14 17:40:30,862 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:40:30,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:40:30,863 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:40:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2115089016, now seen corresponding path program 1 times [2018-09-14 17:40:30,864 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:40:30,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:30,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:30,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:30,866 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:40:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:31,121 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:40:31,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:40:31,122 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:40:31,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:40:31,124 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:40:31,125 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:40:31,125 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 4 states. [2018-09-14 17:40:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:40:34,450 INFO L93 Difference]: Finished difference Result 1594 states and 2534 transitions. [2018-09-14 17:40:34,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:40:34,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2018-09-14 17:40:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:40:34,471 INFO L225 Difference]: With dead ends: 1594 [2018-09-14 17:40:34,472 INFO L226 Difference]: Without dead ends: 780 [2018-09-14 17:40:34,481 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:40:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-09-14 17:40:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2018-09-14 17:40:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-09-14 17:40:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1153 transitions. [2018-09-14 17:40:34,630 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1153 transitions. Word has length 127 [2018-09-14 17:40:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:40:34,631 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1153 transitions. [2018-09-14 17:40:34,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:40:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1153 transitions. [2018-09-14 17:40:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-14 17:40:34,635 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:40:34,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:40:34,636 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:40:34,636 INFO L82 PathProgramCache]: Analyzing trace with hash -385622320, now seen corresponding path program 1 times [2018-09-14 17:40:34,636 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:40:34,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:34,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:34,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:34,638 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:40:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:34,864 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:40:34,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:40:34,865 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:40:34,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:40:34,865 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:40:34,866 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:40:34,866 INFO L87 Difference]: Start difference. First operand 780 states and 1153 transitions. Second operand 4 states. [2018-09-14 17:40:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:40:37,218 INFO L93 Difference]: Finished difference Result 3018 states and 4609 transitions. [2018-09-14 17:40:37,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:40:37,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-09-14 17:40:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:40:37,240 INFO L225 Difference]: With dead ends: 3018 [2018-09-14 17:40:37,240 INFO L226 Difference]: Without dead ends: 2244 [2018-09-14 17:40:37,251 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:40:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2018-09-14 17:40:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2018-09-14 17:40:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2244 states. [2018-09-14 17:40:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3156 transitions. [2018-09-14 17:40:37,343 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3156 transitions. Word has length 139 [2018-09-14 17:40:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:40:37,344 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 3156 transitions. [2018-09-14 17:40:37,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:40:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3156 transitions. [2018-09-14 17:40:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-09-14 17:40:37,362 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:40:37,362 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:40:37,363 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:40:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1047456719, now seen corresponding path program 1 times [2018-09-14 17:40:37,364 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:40:37,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:37,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:37,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:37,365 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:40:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:37,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:40:37,757 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 17:40:37,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:37,768 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:40:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:37,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:40:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:38,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:40:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:38,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:40:38,810 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:40:38,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:38,839 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:40:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:39,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:40:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:39,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:40:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:39,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:40:39,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-14 17:40:39,796 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:40:39,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:40:39,798 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:40:39,798 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:40:39,798 INFO L87 Difference]: Start difference. First operand 2244 states and 3156 transitions. Second operand 9 states. [2018-09-14 17:40:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:40:45,948 INFO L93 Difference]: Finished difference Result 6566 states and 10229 transitions. [2018-09-14 17:40:45,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-14 17:40:45,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 259 [2018-09-14 17:40:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:40:45,991 INFO L225 Difference]: With dead ends: 6566 [2018-09-14 17:40:45,991 INFO L226 Difference]: Without dead ends: 3363 [2018-09-14 17:40:46,036 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1033 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-09-14 17:40:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2018-09-14 17:40:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3248. [2018-09-14 17:40:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2018-09-14 17:40:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4177 transitions. [2018-09-14 17:40:46,159 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4177 transitions. Word has length 259 [2018-09-14 17:40:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:40:46,159 INFO L480 AbstractCegarLoop]: Abstraction has 3248 states and 4177 transitions. [2018-09-14 17:40:46,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:40:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4177 transitions. [2018-09-14 17:40:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-09-14 17:40:46,176 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:40:46,176 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:40:46,177 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:40:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 396889995, now seen corresponding path program 1 times [2018-09-14 17:40:46,177 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:40:46,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:46,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:46,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:46,178 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:40:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:46,492 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:40:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-14 17:40:46,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:40:46,979 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) [2018-09-14 17:40:46,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:46,995 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:40:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:47,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:40:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:47,520 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:40:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:47,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:40:47,953 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 17:40:47,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:47,968 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:40:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:48,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:40:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-14 17:40:48,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:40:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-09-14 17:40:48,875 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 17:40:48,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 11 [2018-09-14 17:40:48,876 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:40:48,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:40:48,877 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:40:48,877 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:40:48,877 INFO L87 Difference]: Start difference. First operand 3248 states and 4177 transitions. Second operand 5 states. [2018-09-14 17:40:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:40:50,135 INFO L93 Difference]: Finished difference Result 6231 states and 8048 transitions. [2018-09-14 17:40:50,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 17:40:50,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2018-09-14 17:40:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:40:50,157 INFO L225 Difference]: With dead ends: 6231 [2018-09-14 17:40:50,157 INFO L226 Difference]: Without dead ends: 3197 [2018-09-14 17:40:50,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1084 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:40:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2018-09-14 17:40:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3172. [2018-09-14 17:40:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2018-09-14 17:40:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3964 transitions. [2018-09-14 17:40:50,264 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3964 transitions. Word has length 273 [2018-09-14 17:40:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:40:50,265 INFO L480 AbstractCegarLoop]: Abstraction has 3172 states and 3964 transitions. [2018-09-14 17:40:50,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:40:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3964 transitions. [2018-09-14 17:40:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-14 17:40:50,279 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:40:50,279 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:40:50,280 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:40:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash 259056362, now seen corresponding path program 1 times [2018-09-14 17:40:50,280 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:40:50,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:50,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:50,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:50,281 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:40:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:51,228 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2018-09-14 17:40:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 146 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:40:51,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:40:51,564 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 17:40:51,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:51,572 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:40:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:51,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:40:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-14 17:40:52,028 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:40:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:40:52,680 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:40:52,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2018-09-14 17:40:52,680 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:40:52,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:40:52,681 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:40:52,681 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-09-14 17:40:52,681 INFO L87 Difference]: Start difference. First operand 3172 states and 3964 transitions. Second operand 5 states. [2018-09-14 17:40:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:40:54,660 INFO L93 Difference]: Finished difference Result 7725 states and 9433 transitions. [2018-09-14 17:40:54,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:40:54,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 276 [2018-09-14 17:40:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:40:54,686 INFO L225 Difference]: With dead ends: 7725 [2018-09-14 17:40:54,686 INFO L226 Difference]: Without dead ends: 4363 [2018-09-14 17:40:54,699 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 548 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-09-14 17:40:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2018-09-14 17:40:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3982. [2018-09-14 17:40:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3982 states. [2018-09-14 17:40:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 4775 transitions. [2018-09-14 17:40:54,802 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 4775 transitions. Word has length 276 [2018-09-14 17:40:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:40:54,803 INFO L480 AbstractCegarLoop]: Abstraction has 3982 states and 4775 transitions. [2018-09-14 17:40:54,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:40:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 4775 transitions. [2018-09-14 17:40:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-09-14 17:40:54,829 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:40:54,829 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, 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, 2, 2, 2, 2, 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] [2018-09-14 17:40:54,830 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:40:54,830 INFO L82 PathProgramCache]: Analyzing trace with hash -754789960, now seen corresponding path program 1 times [2018-09-14 17:40:54,830 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:40:54,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:54,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:54,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:40:54,832 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:40:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 196 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:40:55,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:40:55,700 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 17:40:55,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:55,713 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:40:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:55,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:40:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-14 17:40:56,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:40:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 118 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:40:56,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:40:56,902 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 17:40:56,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:40:56,918 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:40:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:40:57,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:40:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-14 17:40:58,224 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:40:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 118 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:40:58,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:40:58,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-14 17:40:58,822 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:40:58,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 17:40:58,823 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 17:40:58,823 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-09-14 17:40:58,824 INFO L87 Difference]: Start difference. First operand 3982 states and 4775 transitions. Second operand 15 states. [2018-09-14 17:41:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:02,489 INFO L93 Difference]: Finished difference Result 8075 states and 9764 transitions. [2018-09-14 17:41:02,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-14 17:41:02,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 361 [2018-09-14 17:41:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:02,508 INFO L225 Difference]: With dead ends: 8075 [2018-09-14 17:41:02,508 INFO L226 Difference]: Without dead ends: 4266 [2018-09-14 17:41:02,522 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1485 GetRequests, 1442 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2018-09-14 17:41:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2018-09-14 17:41:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 4229. [2018-09-14 17:41:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4229 states. [2018-09-14 17:41:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 4860 transitions. [2018-09-14 17:41:02,618 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 4860 transitions. Word has length 361 [2018-09-14 17:41:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:02,618 INFO L480 AbstractCegarLoop]: Abstraction has 4229 states and 4860 transitions. [2018-09-14 17:41:02,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-14 17:41:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 4860 transitions. [2018-09-14 17:41:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-09-14 17:41:02,639 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:02,640 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:02,640 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2123277887, now seen corresponding path program 1 times [2018-09-14 17:41:02,641 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:02,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:02,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:02,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:02,642 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:03,214 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-09-14 17:41:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 257 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:03,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:03,481 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 17:41:03,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:03,492 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:03,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-14 17:41:03,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 108 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-14 17:41:04,227 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:41:04,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 15 [2018-09-14 17:41:04,227 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:04,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:41:04,228 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:41:04,228 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:41:04,228 INFO L87 Difference]: Start difference. First operand 4229 states and 4860 transitions. Second operand 5 states. [2018-09-14 17:41:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:06,163 INFO L93 Difference]: Finished difference Result 8565 states and 9876 transitions. [2018-09-14 17:41:06,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:41:06,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2018-09-14 17:41:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:06,181 INFO L225 Difference]: With dead ends: 8565 [2018-09-14 17:41:06,181 INFO L226 Difference]: Without dead ends: 4710 [2018-09-14 17:41:06,193 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 769 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:41:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2018-09-14 17:41:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 4702. [2018-09-14 17:41:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4702 states. [2018-09-14 17:41:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4702 states to 4702 states and 5269 transitions. [2018-09-14 17:41:06,288 INFO L78 Accepts]: Start accepts. Automaton has 4702 states and 5269 transitions. Word has length 386 [2018-09-14 17:41:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:06,288 INFO L480 AbstractCegarLoop]: Abstraction has 4702 states and 5269 transitions. [2018-09-14 17:41:06,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:41:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4702 states and 5269 transitions. [2018-09-14 17:41:06,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-09-14 17:41:06,311 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:06,311 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:06,311 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:06,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1745729337, now seen corresponding path program 1 times [2018-09-14 17:41:06,312 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:06,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:06,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:06,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:06,313 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-14 17:41:06,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:06,965 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 17:41:06,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:06,977 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:07,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 663 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-09-14 17:41:07,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:07,449 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 17:41:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-14 17:41:07,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:07,942 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:41:07,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:07,958 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:08,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 659 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-09-14 17:41:08,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 376 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-14 17:41:08,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:08,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 8 [2018-09-14 17:41:08,840 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:08,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:41:08,841 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:41:08,842 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:41:08,842 INFO L87 Difference]: Start difference. First operand 4702 states and 5269 transitions. Second operand 7 states. [2018-09-14 17:41:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:11,429 INFO L93 Difference]: Finished difference Result 10212 states and 11667 transitions. [2018-09-14 17:41:11,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 17:41:11,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 497 [2018-09-14 17:41:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:11,468 INFO L225 Difference]: With dead ends: 10212 [2018-09-14 17:41:11,468 INFO L226 Difference]: Without dead ends: 4646 [2018-09-14 17:41:11,486 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2007 GetRequests, 1985 SyntacticMatches, 11 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:41:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2018-09-14 17:41:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 4641. [2018-09-14 17:41:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4641 states. [2018-09-14 17:41:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 5164 transitions. [2018-09-14 17:41:11,577 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 5164 transitions. Word has length 497 [2018-09-14 17:41:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:11,578 INFO L480 AbstractCegarLoop]: Abstraction has 4641 states and 5164 transitions. [2018-09-14 17:41:11,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:41:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 5164 transitions. [2018-09-14 17:41:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2018-09-14 17:41:11,591 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:11,592 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:11,592 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 467012809, now seen corresponding path program 1 times [2018-09-14 17:41:11,592 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:11,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:11,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:11,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:11,593 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 511 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-09-14 17:41:12,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:12,860 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:41:12,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:12,868 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:13,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 872 proven. 2 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2018-09-14 17:41:13,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 505 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-14 17:41:14,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:14,111 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:41:14,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:14,128 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:14,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 664 proven. 210 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2018-09-14 17:41:14,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 216 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-14 17:41:15,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:15,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-14 17:41:15,837 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:15,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 17:41:15,838 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 17:41:15,838 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-14 17:41:15,839 INFO L87 Difference]: Start difference. First operand 4641 states and 5164 transitions. Second operand 13 states. [2018-09-14 17:41:16,830 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-09-14 17:41:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:18,106 INFO L93 Difference]: Finished difference Result 9068 states and 10377 transitions. [2018-09-14 17:41:18,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-14 17:41:18,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 582 [2018-09-14 17:41:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:18,125 INFO L225 Difference]: With dead ends: 9068 [2018-09-14 17:41:18,125 INFO L226 Difference]: Without dead ends: 4602 [2018-09-14 17:41:18,136 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2356 GetRequests, 2318 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2018-09-14 17:41:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2018-09-14 17:41:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4487. [2018-09-14 17:41:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4487 states. [2018-09-14 17:41:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4487 states to 4487 states and 4889 transitions. [2018-09-14 17:41:18,218 INFO L78 Accepts]: Start accepts. Automaton has 4487 states and 4889 transitions. Word has length 582 [2018-09-14 17:41:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:18,219 INFO L480 AbstractCegarLoop]: Abstraction has 4487 states and 4889 transitions. [2018-09-14 17:41:18,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 17:41:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4487 states and 4889 transitions. [2018-09-14 17:41:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-09-14 17:41:18,232 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:18,232 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:18,232 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:18,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1768071477, now seen corresponding path program 2 times [2018-09-14 17:41:18,233 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:18,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:18,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:18,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:18,234 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 537 proven. 534 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-09-14 17:41:19,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:19,575 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 17:41:19,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 17:41:19,585 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 17:41:19,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 17:41:19,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 17:41:19,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 924 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-14 17:41:20,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 531 proven. 112 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-09-14 17:41:20,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:20,867 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:41:20,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 17:41:20,883 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 17:41:21,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 17:41:21,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 17:41:21,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 909 proven. 17 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-14 17:41:22,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:22,954 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-14 17:41:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 210 proven. 748 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-09-14 17:41:25,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:25,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-09-14 17:41:25,018 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:25,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-14 17:41:25,019 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-14 17:41:25,020 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2018-09-14 17:41:25,020 INFO L87 Difference]: Start difference. First operand 4487 states and 4889 transitions. Second operand 18 states. [2018-09-14 17:41:29,559 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-09-14 17:41:29,885 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-09-14 17:41:31,174 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-09-14 17:41:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:33,177 INFO L93 Difference]: Finished difference Result 8906 states and 9800 transitions. [2018-09-14 17:41:33,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-14 17:41:33,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 608 [2018-09-14 17:41:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:33,191 INFO L225 Difference]: With dead ends: 8906 [2018-09-14 17:41:33,191 INFO L226 Difference]: Without dead ends: 4478 [2018-09-14 17:41:33,200 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2497 GetRequests, 2424 SyntacticMatches, 14 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2018-09-14 17:41:33,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2018-09-14 17:41:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 3833. [2018-09-14 17:41:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3833 states. [2018-09-14 17:41:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 4128 transitions. [2018-09-14 17:41:33,267 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 4128 transitions. Word has length 608 [2018-09-14 17:41:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:33,268 INFO L480 AbstractCegarLoop]: Abstraction has 3833 states and 4128 transitions. [2018-09-14 17:41:33,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-14 17:41:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 4128 transitions. [2018-09-14 17:41:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2018-09-14 17:41:33,280 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:33,281 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 17:41:33,281 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -459704605, now seen corresponding path program 1 times [2018-09-14 17:41:33,282 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:33,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:33,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 17:41:33,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:33,283 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-14 17:41:34,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:34,116 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 17:41:34,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:34,124 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:34,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-14 17:41:34,646 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-14 17:41:35,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:35,203 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 17:41:35,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:35,219 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:35,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-14 17:41:35,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 538 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-14 17:41:36,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:36,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-14 17:41:36,168 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:36,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:41:36,169 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:41:36,170 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:41:36,170 INFO L87 Difference]: Start difference. First operand 3833 states and 4128 transitions. Second operand 7 states. [2018-09-14 17:41:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:37,917 INFO L93 Difference]: Finished difference Result 10497 states and 12094 transitions. [2018-09-14 17:41:37,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 17:41:37,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 682 [2018-09-14 17:41:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:37,948 INFO L225 Difference]: With dead ends: 10497 [2018-09-14 17:41:37,949 INFO L226 Difference]: Without dead ends: 6855 [2018-09-14 17:41:37,962 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2741 GetRequests, 2727 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:41:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6855 states. [2018-09-14 17:41:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6855 to 6560. [2018-09-14 17:41:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6560 states. [2018-09-14 17:41:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 7114 transitions. [2018-09-14 17:41:38,105 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 7114 transitions. Word has length 682 [2018-09-14 17:41:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:38,106 INFO L480 AbstractCegarLoop]: Abstraction has 6560 states and 7114 transitions. [2018-09-14 17:41:38,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:41:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 7114 transitions. [2018-09-14 17:41:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-14 17:41:38,126 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:38,126 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:38,127 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1037750616, now seen corresponding path program 1 times [2018-09-14 17:41:38,127 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:38,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:38,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:38,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:38,129 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:39,508 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-14 17:41:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 789 proven. 835 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-09-14 17:41:40,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:40,628 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 17:41:40,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:40,637 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:40,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1323 proven. 2 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-09-14 17:41:41,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 777 proven. 112 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-09-14 17:41:42,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:42,587 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 17:41:42,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:42,603 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:43,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1315 proven. 10 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-09-14 17:41:43,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:43,802 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-14 17:41:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 282 proven. 1075 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-09-14 17:41:45,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:45,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-09-14 17:41:45,082 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:45,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-14 17:41:45,083 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-14 17:41:45,083 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2018-09-14 17:41:45,084 INFO L87 Difference]: Start difference. First operand 6560 states and 7114 transitions. Second operand 17 states. [2018-09-14 17:41:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:51,436 INFO L93 Difference]: Finished difference Result 12369 states and 13865 transitions. [2018-09-14 17:41:51,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-14 17:41:51,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 771 [2018-09-14 17:41:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:51,460 INFO L225 Difference]: With dead ends: 12369 [2018-09-14 17:41:51,460 INFO L226 Difference]: Without dead ends: 5198 [2018-09-14 17:41:51,482 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3157 GetRequests, 3084 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=980, Invalid=3442, Unknown=0, NotChecked=0, Total=4422 [2018-09-14 17:41:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2018-09-14 17:41:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4955. [2018-09-14 17:41:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4955 states. [2018-09-14 17:41:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 5335 transitions. [2018-09-14 17:41:51,591 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 5335 transitions. Word has length 771 [2018-09-14 17:41:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:51,592 INFO L480 AbstractCegarLoop]: Abstraction has 4955 states and 5335 transitions. [2018-09-14 17:41:51,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-14 17:41:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 5335 transitions. [2018-09-14 17:41:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2018-09-14 17:41:51,604 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:51,604 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:51,605 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash -658629070, now seen corresponding path program 1 times [2018-09-14 17:41:51,605 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:51,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:51,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:51,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:51,606 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 785 proven. 845 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-09-14 17:41:54,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:54,550 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 17:41:54,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:54,561 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:54,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1264 proven. 2 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2018-09-14 17:41:55,077 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 742 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-09-14 17:41:55,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:55,623 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:41:55,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:55,638 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:56,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1264 proven. 2 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2018-09-14 17:41:56,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 742 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-09-14 17:41:56,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:56,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-09-14 17:41:56,790 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:56,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-14 17:41:56,791 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-14 17:41:56,792 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-09-14 17:41:56,792 INFO L87 Difference]: Start difference. First operand 4955 states and 5335 transitions. Second operand 20 states. [2018-09-14 17:42:00,614 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-09-14 17:42:05,932 WARN L178 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2018-09-14 17:42:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:07,507 INFO L93 Difference]: Finished difference Result 10426 states and 11335 transitions. [2018-09-14 17:42:07,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-14 17:42:07,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 842 [2018-09-14 17:42:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:07,520 INFO L225 Difference]: With dead ends: 10426 [2018-09-14 17:42:07,520 INFO L226 Difference]: Without dead ends: 5331 [2018-09-14 17:42:07,529 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3496 GetRequests, 3411 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1017, Invalid=5463, Unknown=0, NotChecked=0, Total=6480 [2018-09-14 17:42:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2018-09-14 17:42:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 5076. [2018-09-14 17:42:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5076 states. [2018-09-14 17:42:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 5400 transitions. [2018-09-14 17:42:07,623 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 5400 transitions. Word has length 842 [2018-09-14 17:42:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:07,625 INFO L480 AbstractCegarLoop]: Abstraction has 5076 states and 5400 transitions. [2018-09-14 17:42:07,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-14 17:42:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 5400 transitions. [2018-09-14 17:42:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2018-09-14 17:42:07,643 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:07,644 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:07,645 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:07,645 INFO L82 PathProgramCache]: Analyzing trace with hash 543617974, now seen corresponding path program 1 times [2018-09-14 17:42:07,645 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:07,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:07,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:07,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:07,646 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1164 proven. 2247 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2018-09-14 17:42:12,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:12,209 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:12,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:12,217 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:12,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1161 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-09-14 17:42:13,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1161 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-09-14 17:42:14,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:14,521 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 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:14,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:14,536 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:15,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 2274 proven. 6 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2018-09-14 17:42:16,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3758 backedges. 1528 proven. 271 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-09-14 17:42:18,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:18,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5, 7, 8] total 44 [2018-09-14 17:42:18,029 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:18,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-14 17:42:18,031 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-14 17:42:18,032 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2018-09-14 17:42:18,032 INFO L87 Difference]: Start difference. First operand 5076 states and 5400 transitions. Second operand 31 states. [2018-09-14 17:42:20,584 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2018-09-14 17:42:21,477 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2018-09-14 17:42:22,055 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2018-09-14 17:42:25,943 WARN L178 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2018-09-14 17:42:26,883 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2018-09-14 17:42:27,438 WARN L178 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-09-14 17:42:27,695 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2018-09-14 17:42:31,174 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2018-09-14 17:42:31,552 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2018-09-14 17:42:33,346 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2018-09-14 17:42:36,548 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2018-09-14 17:42:37,739 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2018-09-14 17:42:38,427 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-09-14 17:42:38,969 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-09-14 17:42:39,141 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2018-09-14 17:42:39,513 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2018-09-14 17:42:40,907 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2018-09-14 17:42:41,077 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2018-09-14 17:42:41,457 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 24 [2018-09-14 17:42:42,138 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2018-09-14 17:42:42,368 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2018-09-14 17:42:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:42,831 INFO L93 Difference]: Finished difference Result 11910 states and 13432 transitions. [2018-09-14 17:42:42,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-14 17:42:42,831 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 1099 [2018-09-14 17:42:42,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:42,853 INFO L225 Difference]: With dead ends: 11910 [2018-09-14 17:42:42,853 INFO L226 Difference]: Without dead ends: 6609 [2018-09-14 17:42:42,868 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4563 GetRequests, 4422 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2487, Invalid=16145, Unknown=0, NotChecked=0, Total=18632 [2018-09-14 17:42:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6609 states. [2018-09-14 17:42:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6609 to 5804. [2018-09-14 17:42:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5804 states. [2018-09-14 17:42:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 6160 transitions. [2018-09-14 17:42:43,020 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 6160 transitions. Word has length 1099 [2018-09-14 17:42:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:43,021 INFO L480 AbstractCegarLoop]: Abstraction has 5804 states and 6160 transitions. [2018-09-14 17:42:43,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-14 17:42:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 6160 transitions. [2018-09-14 17:42:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1148 [2018-09-14 17:42:43,036 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:43,037 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:43,037 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 831716118, now seen corresponding path program 1 times [2018-09-14 17:42:43,038 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:43,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:43,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:43,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:43,039 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 355 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2018-09-14 17:42:44,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:44,467 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:44,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:44,479 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:44,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 2463 proven. 6 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-09-14 17:42:45,285 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-09-14 17:42:46,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:46,257 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 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:46,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:46,275 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:46,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 2463 proven. 6 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-09-14 17:42:47,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1677 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-09-14 17:42:48,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:48,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 14 [2018-09-14 17:42:48,318 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:48,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:42:48,319 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:42:48,319 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:42:48,319 INFO L87 Difference]: Start difference. First operand 5804 states and 6160 transitions. Second operand 9 states. [2018-09-14 17:42:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:50,690 INFO L93 Difference]: Finished difference Result 12766 states and 13632 transitions. [2018-09-14 17:42:50,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-14 17:42:50,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1147 [2018-09-14 17:42:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:50,710 INFO L225 Difference]: With dead ends: 12766 [2018-09-14 17:42:50,710 INFO L226 Difference]: Without dead ends: 7153 [2018-09-14 17:42:50,722 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4614 GetRequests, 4588 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-09-14 17:42:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2018-09-14 17:42:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 6533. [2018-09-14 17:42:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6533 states. [2018-09-14 17:42:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 6932 transitions. [2018-09-14 17:42:50,893 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 6932 transitions. Word has length 1147 [2018-09-14 17:42:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:50,894 INFO L480 AbstractCegarLoop]: Abstraction has 6533 states and 6932 transitions. [2018-09-14 17:42:50,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:42:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 6932 transitions. [2018-09-14 17:42:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1705 [2018-09-14 17:42:50,923 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:50,924 INFO L376 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 17:42:50,924 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1910971973, now seen corresponding path program 1 times [2018-09-14 17:42:50,925 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:50,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:50,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:50,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:50,926 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 1940 proven. 5325 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2018-09-14 17:42:56,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:56,933 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:56,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:56,944 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:57,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2874 proven. 85 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-09-14 17:42:58,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2950 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-14 17:43:01,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:01,823 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 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:01,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:01,838 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:02,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2874 proven. 85 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-09-14 17:43:03,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8916 backedges. 2950 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-14 17:43:06,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:06,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8, 9, 8, 9] total 39 [2018-09-14 17:43:06,707 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:06,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-14 17:43:06,709 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-14 17:43:06,710 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2018-09-14 17:43:06,710 INFO L87 Difference]: Start difference. First operand 6533 states and 6932 transitions. Second operand 33 states. [2018-09-14 17:43:10,072 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2018-09-14 17:43:12,143 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2018-09-14 17:43:12,884 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2018-09-14 17:43:13,679 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-09-14 17:43:17,419 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2018-09-14 17:43:24,441 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2018-09-14 17:43:29,644 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2018-09-14 17:43:30,320 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2018-09-14 17:43:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:34,796 INFO L93 Difference]: Finished difference Result 14295 states and 15242 transitions. [2018-09-14 17:43:34,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-14 17:43:34,796 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1704 [2018-09-14 17:43:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:34,813 INFO L225 Difference]: With dead ends: 14295 [2018-09-14 17:43:34,813 INFO L226 Difference]: Without dead ends: 7048 [2018-09-14 17:43:34,829 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7015 GetRequests, 6853 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8486 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3937, Invalid=21185, Unknown=0, NotChecked=0, Total=25122 [2018-09-14 17:43:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2018-09-14 17:43:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 6023. [2018-09-14 17:43:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6023 states. [2018-09-14 17:43:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 6338 transitions. [2018-09-14 17:43:34,962 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 6338 transitions. Word has length 1704 [2018-09-14 17:43:34,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:34,964 INFO L480 AbstractCegarLoop]: Abstraction has 6023 states and 6338 transitions. [2018-09-14 17:43:34,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-14 17:43:34,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 6338 transitions. [2018-09-14 17:43:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2219 [2018-09-14 17:43:35,000 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:35,001 INFO L376 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 11, 11, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2018-09-14 17:43:35,001 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash -267684955, now seen corresponding path program 1 times [2018-09-14 17:43:35,002 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:35,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:35,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:35,003 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 6765 proven. 2405 refuted. 0 times theorem prover too weak. 6177 trivial. 0 not checked. [2018-09-14 17:43:39,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:39,081 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:43:39,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:39,091 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:39,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 5675 proven. 2 refuted. 0 times theorem prover too weak. 9670 trivial. 0 not checked. [2018-09-14 17:43:41,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 2533 proven. 244 refuted. 0 times theorem prover too weak. 12570 trivial. 0 not checked. [2018-09-14 17:43:44,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:44,171 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 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:44,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:44,196 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:45,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 9907 proven. 30 refuted. 0 times theorem prover too weak. 5410 trivial. 0 not checked. [2018-09-14 17:43:47,408 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15347 backedges. 6779 proven. 1804 refuted. 0 times theorem prover too weak. 6764 trivial. 0 not checked. [2018-09-14 17:43:52,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:52,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 11 [2018-09-14 17:43:52,442 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:52,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 17:43:52,444 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 17:43:52,444 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:43:52,444 INFO L87 Difference]: Start difference. First operand 6023 states and 6338 transitions. Second operand 10 states. [2018-09-14 17:43:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:54,611 INFO L93 Difference]: Finished difference Result 9750 states and 10171 transitions. [2018-09-14 17:43:54,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 17:43:54,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2218 [2018-09-14 17:43:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:54,614 INFO L225 Difference]: With dead ends: 9750 [2018-09-14 17:43:54,614 INFO L226 Difference]: Without dead ends: 0 [2018-09-14 17:43:54,626 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8907 GetRequests, 8853 SyntacticMatches, 37 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-14 17:43:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-14 17:43:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-14 17:43:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-14 17:43:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-14 17:43:54,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2218 [2018-09-14 17:43:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:54,627 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-14 17:43:54,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 17:43:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-14 17:43:54,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-14 17:43:54,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-14 17:43:54,864 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:54,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:54,998 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:55,447 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:55,769 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:55,856 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:56,062 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:56,126 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:56,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:56,393 WARN L178 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 695 DAG size of output: 572 [2018-09-14 17:43:56,411 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:56,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:57,253 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:57,361 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:57,603 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:57,665 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:57,673 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-14 17:43:57,938 WARN L178 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 695 DAG size of output: 572 [2018-09-14 17:43:58,461 WARN L178 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2018-09-14 17:43:59,421 WARN L178 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2018-09-14 17:44:02,410 WARN L178 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 334 DAG size of output: 148 [2018-09-14 17:44:07,101 WARN L178 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 550 DAG size of output: 114 Received shutdown request... [2018-09-14 17:44:10,525 WARN L186 SmtUtils]: Removed 8 from assertion stack [2018-09-14 17:44:10,525 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-09-14 17:44:10,526 INFO L168 Benchmark]: Toolchain (without parser) took 228540.82 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -116.3 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-14 17:44:10,527 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:44:10,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 916.46 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-14 17:44:10,529 INFO L168 Benchmark]: Boogie Procedure Inliner took 143.00 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:44:10,529 INFO L168 Benchmark]: Boogie Preprocessor took 279.49 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 730.3 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -831.7 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:44:10,530 INFO L168 Benchmark]: RCFGBuilder took 3787.40 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 123.5 MB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. [2018-09-14 17:44:10,531 INFO L168 Benchmark]: TraceAbstraction took 223408.66 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 528.4 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-14 17:44:10,535 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 916.46 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 143.00 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 279.49 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 730.3 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -831.7 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3787.40 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 123.5 MB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223408.66 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 528.4 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 112]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 550. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label45_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-44-10-547.csv Completed graceful shutdown