java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label18_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:50:11,347 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:50:11,350 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:50:11,362 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:50:11,363 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:50:11,365 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:50:11,366 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:50:11,368 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:50:11,370 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:50:11,370 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:50:11,371 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:50:11,372 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:50:11,373 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:50:11,374 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:50:11,375 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:50:11,376 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:50:11,376 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:50:11,380 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:50:11,385 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:50:11,386 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:50:11,390 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:50:11,391 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:50:11,396 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:50:11,396 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:50:11,396 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:50:11,397 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:50:11,398 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:50:11,400 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:50:11,400 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:50:11,401 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:50:11,402 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:50:11,402 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:50:11,402 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:50:11,403 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:50:11,404 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:50:11,404 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:50:11,405 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 [2018-07-24 12:50:11,421 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:50:11,422 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:50:11,423 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:50:11,423 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:50:11,423 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:50:11,423 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:50:11,423 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:50:11,424 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:50:11,424 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:50:11,424 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:50:11,424 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:50:11,425 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:50:11,425 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:50:11,426 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:50:11,426 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:50:11,426 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:50:11,426 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:50:11,426 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:50:11,427 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:50:11,427 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:50:11,427 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:50:11,427 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:50:11,427 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:50:11,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:50:11,428 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:50:11,428 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:50:11,428 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:50:11,428 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:50:11,429 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:50:11,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:50:11,429 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:50:11,429 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:50:11,430 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:50:11,474 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:50:11,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:50:11,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:50:11,493 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:50:11,494 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:50:11,495 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label18_true-unreach-call.c [2018-07-24 12:50:11,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dd61ebc/f36a5c607f104d65a9013623146db758/FLAGf58d124fe [2018-07-24 12:50:12,271 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:50:12,272 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label18_true-unreach-call.c [2018-07-24 12:50:12,300 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dd61ebc/f36a5c607f104d65a9013623146db758/FLAGf58d124fe [2018-07-24 12:50:12,318 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dd61ebc/f36a5c607f104d65a9013623146db758 [2018-07-24 12:50:12,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:50:12,329 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:50:12,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:50:12,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:50:12,341 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:50:12,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:50:12" (1/1) ... [2018-07-24 12:50:12,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e225eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:12, skipping insertion in model container [2018-07-24 12:50:12,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:50:12" (1/1) ... [2018-07-24 12:50:12,601 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:50:13,166 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:50:13,186 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:50:13,467 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:50:13,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13 WrapperNode [2018-07-24 12:50:13,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:50:13,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:50:13,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:50:13,602 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:50:13,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:13,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:13,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:50:13,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:50:13,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:50:13,785 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:50:13,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:13,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:13,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:13,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:14,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:14,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:14,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (1/1) ... [2018-07-24 12:50:14,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:50:14,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:50:14,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:50:14,192 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:50:14,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (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 [2018-07-24 12:50:14,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:50:14,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:50:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:50:14,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:50:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:50:14,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:50:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:50:14,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:50:19,790 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:50:19,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:50:19 BoogieIcfgContainer [2018-07-24 12:50:19,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:50:19,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:50:19,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:50:19,797 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:50:19,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:50:12" (1/3) ... [2018-07-24 12:50:19,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58102cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:50:19, skipping insertion in model container [2018-07-24 12:50:19,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:50:13" (2/3) ... [2018-07-24 12:50:19,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58102cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:50:19, skipping insertion in model container [2018-07-24 12:50:19,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:50:19" (3/3) ... [2018-07-24 12:50:19,803 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label18_true-unreach-call.c [2018-07-24 12:50:19,813 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:50:19,822 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:50:19,883 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:50:19,884 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:50:19,884 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:50:19,884 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:50:19,884 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:50:19,884 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:50:19,885 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:50:19,885 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:50:19,885 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:50:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:50:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-24 12:50:19,950 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:19,951 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:19,952 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1820417999, now seen corresponding path program 1 times [2018-07-24 12:50:19,961 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:20,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:20,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:20,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:20,022 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:20,902 WARN L169 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:50:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:21,069 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:50:21,069 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:50:21,069 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:50:21,075 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:50:21,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:50:21,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:50:21,089 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:50:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:23,203 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-07-24 12:50:23,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:50:23,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-07-24 12:50:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:23,228 INFO L225 Difference]: With dead ends: 844 [2018-07-24 12:50:23,229 INFO L226 Difference]: Without dead ends: 530 [2018-07-24 12:50:23,237 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:50:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-07-24 12:50:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-07-24 12:50:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-07-24 12:50:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-07-24 12:50:23,338 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 210 [2018-07-24 12:50:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:23,340 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-07-24 12:50:23,340 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:50:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-07-24 12:50:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-07-24 12:50:23,351 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:23,351 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:23,352 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:23,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1878986571, now seen corresponding path program 1 times [2018-07-24 12:50:23,352 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:23,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:23,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:23,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:23,354 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:23,911 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:50:23,912 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:50:23,912 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:50:23,914 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:50:23,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:50:23,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:50:23,915 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-07-24 12:50:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:25,943 INFO L93 Difference]: Finished difference Result 1477 states and 2511 transitions. [2018-07-24 12:50:25,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:50:25,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 223 [2018-07-24 12:50:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:25,953 INFO L225 Difference]: With dead ends: 1477 [2018-07-24 12:50:25,953 INFO L226 Difference]: Without dead ends: 958 [2018-07-24 12:50:25,960 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:50:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-07-24 12:50:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2018-07-24 12:50:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-07-24 12:50:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1546 transitions. [2018-07-24 12:50:26,004 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1546 transitions. Word has length 223 [2018-07-24 12:50:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:26,004 INFO L471 AbstractCegarLoop]: Abstraction has 943 states and 1546 transitions. [2018-07-24 12:50:26,005 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:50:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1546 transitions. [2018-07-24 12:50:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-24 12:50:26,013 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:26,013 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:26,013 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1705825864, now seen corresponding path program 1 times [2018-07-24 12:50:26,014 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:26,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:26,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:26,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:26,016 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:26,260 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-07-24 12:50:26,581 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:50:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:26,909 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:50:26,909 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 12:50:26,909 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:50:26,911 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:50:26,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:50:26,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:50:26,912 INFO L87 Difference]: Start difference. First operand 943 states and 1546 transitions. Second operand 7 states. [2018-07-24 12:50:27,170 WARN L169 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:50:30,417 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:50:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:33,358 INFO L93 Difference]: Finished difference Result 2923 states and 5188 transitions. [2018-07-24 12:50:33,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:50:33,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 228 [2018-07-24 12:50:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:33,382 INFO L225 Difference]: With dead ends: 2923 [2018-07-24 12:50:33,382 INFO L226 Difference]: Without dead ends: 1986 [2018-07-24 12:50:33,388 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:50:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2018-07-24 12:50:33,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1885. [2018-07-24 12:50:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2018-07-24 12:50:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3120 transitions. [2018-07-24 12:50:33,488 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3120 transitions. Word has length 228 [2018-07-24 12:50:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:33,488 INFO L471 AbstractCegarLoop]: Abstraction has 1885 states and 3120 transitions. [2018-07-24 12:50:33,488 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:50:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3120 transitions. [2018-07-24 12:50:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-07-24 12:50:33,498 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:33,498 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:33,498 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 637352951, now seen corresponding path program 1 times [2018-07-24 12:50:33,499 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:33,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:33,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:33,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:33,500 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:50:33,736 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:33,736 INFO L191 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 [2018-07-24 12:50:33,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:33,746 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:34,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 12:50:34,463 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:50:35,121 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:50:35,122 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:50:35,122 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:50:35,122 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:50:35,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:50:35,123 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:50:35,123 INFO L87 Difference]: Start difference. First operand 1885 states and 3120 transitions. Second operand 5 states. [2018-07-24 12:50:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:38,602 INFO L93 Difference]: Finished difference Result 6151 states and 10653 transitions. [2018-07-24 12:50:38,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:50:38,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2018-07-24 12:50:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:38,635 INFO L225 Difference]: With dead ends: 6151 [2018-07-24 12:50:38,635 INFO L226 Difference]: Without dead ends: 4272 [2018-07-24 12:50:38,647 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 463 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:50:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2018-07-24 12:50:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3812. [2018-07-24 12:50:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3812 states. [2018-07-24 12:50:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 6098 transitions. [2018-07-24 12:50:38,786 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 6098 transitions. Word has length 234 [2018-07-24 12:50:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:38,786 INFO L471 AbstractCegarLoop]: Abstraction has 3812 states and 6098 transitions. [2018-07-24 12:50:38,787 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:50:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 6098 transitions. [2018-07-24 12:50:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-24 12:50:38,803 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:38,804 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:38,804 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:38,804 INFO L82 PathProgramCache]: Analyzing trace with hash 902382392, now seen corresponding path program 1 times [2018-07-24 12:50:38,805 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:38,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:38,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:38,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:38,806 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:39,098 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:50:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:39,471 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:39,471 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:39,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:39,486 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:39,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:40,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:40,424 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:40,424 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:50:40,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:40,440 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:40,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 12:50:41,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 12:50:41,608 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 12:50:41,609 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 17 [2018-07-24 12:50:41,609 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:50:41,610 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:50:41,610 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:50:41,610 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:50:41,610 INFO L87 Difference]: Start difference. First operand 3812 states and 6098 transitions. Second operand 5 states. [2018-07-24 12:50:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:42,380 INFO L93 Difference]: Finished difference Result 11539 states and 18993 transitions. [2018-07-24 12:50:42,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:50:42,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 235 [2018-07-24 12:50:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:42,422 INFO L225 Difference]: With dead ends: 11539 [2018-07-24 12:50:42,422 INFO L226 Difference]: Without dead ends: 7733 [2018-07-24 12:50:42,435 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 928 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:50:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7733 states. [2018-07-24 12:50:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7733 to 7651. [2018-07-24 12:50:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7651 states. [2018-07-24 12:50:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 12364 transitions. [2018-07-24 12:50:42,655 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 12364 transitions. Word has length 235 [2018-07-24 12:50:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:42,655 INFO L471 AbstractCegarLoop]: Abstraction has 7651 states and 12364 transitions. [2018-07-24 12:50:42,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:50:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 12364 transitions. [2018-07-24 12:50:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-24 12:50:42,685 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:42,685 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:42,685 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1824685356, now seen corresponding path program 1 times [2018-07-24 12:50:42,686 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:42,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:42,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:42,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:42,687 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:43,053 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:43,053 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:43,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:43,061 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:43,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:43,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:43,711 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:50:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:43,854 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:43,855 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:50:43,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:43,877 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:44,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:45,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:45,591 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:50:45,591 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:50:45,592 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:50:45,592 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:50:45,593 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:50:45,593 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:50:45,593 INFO L87 Difference]: Start difference. First operand 7651 states and 12364 transitions. Second operand 9 states. [2018-07-24 12:51:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:03,724 INFO L93 Difference]: Finished difference Result 61723 states and 137112 transitions. [2018-07-24 12:51:03,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-24 12:51:03,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 237 [2018-07-24 12:51:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:04,250 INFO L225 Difference]: With dead ends: 61723 [2018-07-24 12:51:04,250 INFO L226 Difference]: Without dead ends: 54078 [2018-07-24 12:51:04,449 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 963 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2018-07-24 12:51:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54078 states. [2018-07-24 12:51:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54078 to 51404. [2018-07-24 12:51:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51404 states. [2018-07-24 12:51:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51404 states to 51404 states and 79368 transitions. [2018-07-24 12:51:07,441 INFO L78 Accepts]: Start accepts. Automaton has 51404 states and 79368 transitions. Word has length 237 [2018-07-24 12:51:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:07,441 INFO L471 AbstractCegarLoop]: Abstraction has 51404 states and 79368 transitions. [2018-07-24 12:51:07,441 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:51:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 51404 states and 79368 transitions. [2018-07-24 12:51:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-24 12:51:07,605 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:07,605 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:07,606 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 42774952, now seen corresponding path program 1 times [2018-07-24 12:51:07,606 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:07,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:07,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:07,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:07,607 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:08,184 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:08,184 INFO L191 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 [2018-07-24 12:51:08,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:08,199 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:08,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:08,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:08,683 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:08,683 INFO L191 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 [2018-07-24 12:51:08,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:08,699 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:09,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:09,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:09,379 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:09,379 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:51:09,379 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:09,380 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:51:09,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:51:09,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:51:09,380 INFO L87 Difference]: Start difference. First operand 51404 states and 79368 transitions. Second operand 9 states. [2018-07-24 12:51:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:14,510 INFO L93 Difference]: Finished difference Result 181170 states and 284471 transitions. [2018-07-24 12:51:14,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 12:51:14,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 243 [2018-07-24 12:51:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:15,161 INFO L225 Difference]: With dead ends: 181170 [2018-07-24 12:51:15,162 INFO L226 Difference]: Without dead ends: 129792 [2018-07-24 12:51:15,404 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 964 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:51:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129792 states. [2018-07-24 12:51:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129792 to 129050. [2018-07-24 12:51:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129050 states. [2018-07-24 12:51:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129050 states to 129050 states and 182333 transitions. [2018-07-24 12:51:19,354 INFO L78 Accepts]: Start accepts. Automaton has 129050 states and 182333 transitions. Word has length 243 [2018-07-24 12:51:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:19,354 INFO L471 AbstractCegarLoop]: Abstraction has 129050 states and 182333 transitions. [2018-07-24 12:51:19,354 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:51:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 129050 states and 182333 transitions. [2018-07-24 12:51:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-24 12:51:19,530 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:19,530 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:19,530 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash -789122775, now seen corresponding path program 1 times [2018-07-24 12:51:19,531 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:19,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:19,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:19,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:19,532 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:20,392 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:20,392 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:51:20,392 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:20,393 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:51:20,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:51:20,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:51:20,394 INFO L87 Difference]: Start difference. First operand 129050 states and 182333 transitions. Second operand 4 states. [2018-07-24 12:51:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:26,025 INFO L93 Difference]: Finished difference Result 288294 states and 415440 transitions. [2018-07-24 12:51:26,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:51:26,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 256 [2018-07-24 12:51:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:26,671 INFO L225 Difference]: With dead ends: 288294 [2018-07-24 12:51:26,671 INFO L226 Difference]: Without dead ends: 159668 [2018-07-24 12:51:26,895 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:51:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159668 states. [2018-07-24 12:51:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159668 to 157930. [2018-07-24 12:51:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157930 states. [2018-07-24 12:51:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157930 states to 157930 states and 215088 transitions. [2018-07-24 12:51:31,131 INFO L78 Accepts]: Start accepts. Automaton has 157930 states and 215088 transitions. Word has length 256 [2018-07-24 12:51:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:31,132 INFO L471 AbstractCegarLoop]: Abstraction has 157930 states and 215088 transitions. [2018-07-24 12:51:31,132 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:51:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 157930 states and 215088 transitions. [2018-07-24 12:51:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-07-24 12:51:31,299 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:31,299 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:31,299 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1066454812, now seen corresponding path program 1 times [2018-07-24 12:51:31,300 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:31,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:31,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:31,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:31,301 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 87 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:51:31,832 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:31,832 INFO L191 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 [2018-07-24 12:51:31,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:31,846 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:32,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:51:32,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 87 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:51:32,356 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:32,356 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:51:32,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:32,376 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:33,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 74 proven. 17 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:51:33,122 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 87 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:51:33,289 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:33,290 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-07-24 12:51:33,290 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:33,291 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:51:33,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:51:33,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:51:33,292 INFO L87 Difference]: Start difference. First operand 157930 states and 215088 transitions. Second operand 6 states. [2018-07-24 12:51:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:37,260 INFO L93 Difference]: Finished difference Result 276338 states and 373376 transitions. [2018-07-24 12:51:37,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 12:51:37,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 285 [2018-07-24 12:51:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:37,736 INFO L225 Difference]: With dead ends: 276338 [2018-07-24 12:51:37,736 INFO L226 Difference]: Without dead ends: 125929 [2018-07-24 12:51:37,917 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1128 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:51:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125929 states. [2018-07-24 12:51:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125929 to 124471. [2018-07-24 12:51:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124471 states. [2018-07-24 12:51:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124471 states to 124471 states and 163406 transitions. [2018-07-24 12:51:40,187 INFO L78 Accepts]: Start accepts. Automaton has 124471 states and 163406 transitions. Word has length 285 [2018-07-24 12:51:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:40,187 INFO L471 AbstractCegarLoop]: Abstraction has 124471 states and 163406 transitions. [2018-07-24 12:51:40,187 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:51:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 124471 states and 163406 transitions. [2018-07-24 12:51:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-07-24 12:51:40,324 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:40,325 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:40,325 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -930962593, now seen corresponding path program 1 times [2018-07-24 12:51:40,325 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:40,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:40,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:40,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:40,326 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:41,581 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:51:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 129 proven. 59 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:51:41,710 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:41,711 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:51:41,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:41,722 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:41,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-24 12:51:42,130 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-24 12:51:42,363 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:51:42,364 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 12:51:42,364 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:42,365 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:51:42,365 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:51:42,365 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:51:42,365 INFO L87 Difference]: Start difference. First operand 124471 states and 163406 transitions. Second operand 5 states. [2018-07-24 12:51:45,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:45,928 INFO L93 Difference]: Finished difference Result 278859 states and 373026 transitions. [2018-07-24 12:51:45,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:51:45,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 344 [2018-07-24 12:51:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:46,387 INFO L225 Difference]: With dead ends: 278859 [2018-07-24 12:51:46,387 INFO L226 Difference]: Without dead ends: 154997 [2018-07-24 12:51:46,582 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 681 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:51:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154997 states. [2018-07-24 12:51:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154997 to 153158. [2018-07-24 12:51:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153158 states. [2018-07-24 12:51:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153158 states to 153158 states and 193933 transitions. [2018-07-24 12:51:53,084 INFO L78 Accepts]: Start accepts. Automaton has 153158 states and 193933 transitions. Word has length 344 [2018-07-24 12:51:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:53,085 INFO L471 AbstractCegarLoop]: Abstraction has 153158 states and 193933 transitions. [2018-07-24 12:51:53,085 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:51:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 153158 states and 193933 transitions. [2018-07-24 12:51:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-07-24 12:51:53,232 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:53,232 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:53,232 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1016366656, now seen corresponding path program 1 times [2018-07-24 12:51:53,233 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:53,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:53,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:53,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:53,234 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:53,733 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:53,733 INFO L191 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 [2018-07-24 12:51:54,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:54,300 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:54,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:54,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:54,981 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:54,981 INFO L191 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 [2018-07-24 12:51:54,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:54,996 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:55,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:55,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:56,106 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:56,107 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 6] total 16 [2018-07-24 12:51:56,107 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:56,108 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:51:56,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:51:56,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:51:56,108 INFO L87 Difference]: Start difference. First operand 153158 states and 193933 transitions. Second operand 7 states. [2018-07-24 12:52:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:01,785 INFO L93 Difference]: Finished difference Result 313649 states and 412275 transitions. [2018-07-24 12:52:01,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:52:01,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 377 [2018-07-24 12:52:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:02,416 INFO L225 Difference]: With dead ends: 313649 [2018-07-24 12:52:02,416 INFO L226 Difference]: Without dead ends: 161104 [2018-07-24 12:52:02,634 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1516 GetRequests, 1500 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:52:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161104 states. [2018-07-24 12:52:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161104 to 158240. [2018-07-24 12:52:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158240 states. [2018-07-24 12:52:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158240 states to 158240 states and 192150 transitions. [2018-07-24 12:52:06,043 INFO L78 Accepts]: Start accepts. Automaton has 158240 states and 192150 transitions. Word has length 377 [2018-07-24 12:52:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:06,044 INFO L471 AbstractCegarLoop]: Abstraction has 158240 states and 192150 transitions. [2018-07-24 12:52:06,044 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:52:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 158240 states and 192150 transitions. [2018-07-24 12:52:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-07-24 12:52:06,194 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:06,194 INFO L353 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:06,195 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1423222277, now seen corresponding path program 1 times [2018-07-24 12:52:06,195 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:06,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:06,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:06,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:06,196 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 225 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:06,568 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:06,569 INFO L191 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 [2018-07-24 12:52:06,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:06,577 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:06,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 254 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:07,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 225 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:07,254 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:07,254 INFO L191 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 [2018-07-24 12:52:07,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:07,269 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:08,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 254 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:08,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 225 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:09,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:09,116 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 14 [2018-07-24 12:52:09,116 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:09,117 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:52:09,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:52:09,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:52:09,117 INFO L87 Difference]: Start difference. First operand 158240 states and 192150 transitions. Second operand 6 states. [2018-07-24 12:52:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:13,518 INFO L93 Difference]: Finished difference Result 262932 states and 331671 transitions. [2018-07-24 12:52:13,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:52:13,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 409 [2018-07-24 12:52:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:13,846 INFO L225 Difference]: With dead ends: 262932 [2018-07-24 12:52:13,846 INFO L226 Difference]: Without dead ends: 105290 [2018-07-24 12:52:14,809 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1646 GetRequests, 1628 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:52:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105290 states. [2018-07-24 12:52:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105290 to 102220. [2018-07-24 12:52:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102220 states. [2018-07-24 12:52:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102220 states to 102220 states and 120171 transitions. [2018-07-24 12:52:16,320 INFO L78 Accepts]: Start accepts. Automaton has 102220 states and 120171 transitions. Word has length 409 [2018-07-24 12:52:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:16,320 INFO L471 AbstractCegarLoop]: Abstraction has 102220 states and 120171 transitions. [2018-07-24 12:52:16,320 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:52:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 102220 states and 120171 transitions. [2018-07-24 12:52:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-07-24 12:52:16,419 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:16,419 INFO L353 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:16,420 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1218152267, now seen corresponding path program 1 times [2018-07-24 12:52:16,420 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:16,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:16,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:16,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:16,421 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 201 proven. 124 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-07-24 12:52:16,778 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:16,778 INFO L191 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 [2018-07-24 12:52:16,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:16,787 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:17,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2018-07-24 12:52:17,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 201 proven. 124 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-07-24 12:52:17,900 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:52:17,900 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-07-24 12:52:17,900 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:17,902 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:52:17,902 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:52:17,903 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:52:17,903 INFO L87 Difference]: Start difference. First operand 102220 states and 120171 transitions. Second operand 6 states. [2018-07-24 12:52:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:21,030 INFO L93 Difference]: Finished difference Result 159509 states and 189000 transitions. [2018-07-24 12:52:21,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:52:21,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 422 [2018-07-24 12:52:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:21,319 INFO L225 Difference]: With dead ends: 159509 [2018-07-24 12:52:21,319 INFO L226 Difference]: Without dead ends: 103288 [2018-07-24 12:52:21,433 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 836 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:52:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103288 states. [2018-07-24 12:52:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103288 to 102315. [2018-07-24 12:52:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102315 states. [2018-07-24 12:52:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102315 states to 102315 states and 120018 transitions. [2018-07-24 12:52:23,908 INFO L78 Accepts]: Start accepts. Automaton has 102315 states and 120018 transitions. Word has length 422 [2018-07-24 12:52:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:23,908 INFO L471 AbstractCegarLoop]: Abstraction has 102315 states and 120018 transitions. [2018-07-24 12:52:23,908 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:52:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 102315 states and 120018 transitions. [2018-07-24 12:52:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-07-24 12:52:24,010 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:24,010 INFO L353 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:24,010 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash 327606366, now seen corresponding path program 1 times [2018-07-24 12:52:24,011 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:24,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:24,012 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 205 proven. 124 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-07-24 12:52:24,388 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:24,388 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:24,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:24,399 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:24,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2018-07-24 12:52:24,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 205 proven. 124 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-07-24 12:52:25,084 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:52:25,084 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:52:25,084 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:25,085 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:52:25,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:52:25,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:52:25,085 INFO L87 Difference]: Start difference. First operand 102315 states and 120018 transitions. Second operand 5 states. [2018-07-24 12:52:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:27,827 INFO L93 Difference]: Finished difference Result 197057 states and 231323 transitions. [2018-07-24 12:52:27,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:52:27,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 424 [2018-07-24 12:52:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:28,060 INFO L225 Difference]: With dead ends: 197057 [2018-07-24 12:52:28,060 INFO L226 Difference]: Without dead ends: 98905 [2018-07-24 12:52:28,724 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 843 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:52:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98905 states. [2018-07-24 12:52:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98905 to 98399. [2018-07-24 12:52:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98399 states. [2018-07-24 12:52:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98399 states to 98399 states and 114712 transitions. [2018-07-24 12:52:29,996 INFO L78 Accepts]: Start accepts. Automaton has 98399 states and 114712 transitions. Word has length 424 [2018-07-24 12:52:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:29,996 INFO L471 AbstractCegarLoop]: Abstraction has 98399 states and 114712 transitions. [2018-07-24 12:52:29,996 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:52:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 98399 states and 114712 transitions. [2018-07-24 12:52:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-07-24 12:52:30,126 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:30,126 INFO L353 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:30,126 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash 903596841, now seen corresponding path program 1 times [2018-07-24 12:52:30,127 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:30,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:30,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:30,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:30,128 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 295 proven. 65 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:30,701 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:30,701 INFO L191 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 [2018-07-24 12:52:30,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:30,709 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:31,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 358 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:31,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 295 proven. 65 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:31,423 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:31,423 INFO L191 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 [2018-07-24 12:52:31,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:31,827 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:32,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 358 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:32,870 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 295 proven. 65 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:33,444 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:33,444 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 6] total 16 [2018-07-24 12:52:33,444 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:33,445 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:52:33,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:52:33,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:52:33,446 INFO L87 Difference]: Start difference. First operand 98399 states and 114712 transitions. Second operand 7 states. [2018-07-24 12:52:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:37,864 INFO L93 Difference]: Finished difference Result 292849 states and 356474 transitions. [2018-07-24 12:52:37,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:52:37,865 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 443 [2018-07-24 12:52:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:38,391 INFO L225 Difference]: With dead ends: 292849 [2018-07-24 12:52:38,391 INFO L226 Difference]: Without dead ends: 213444 [2018-07-24 12:52:38,475 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1780 GetRequests, 1764 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:52:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213444 states. [2018-07-24 12:52:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213444 to 209611. [2018-07-24 12:52:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209611 states. [2018-07-24 12:52:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209611 states to 209611 states and 245789 transitions. [2018-07-24 12:52:42,403 INFO L78 Accepts]: Start accepts. Automaton has 209611 states and 245789 transitions. Word has length 443 [2018-07-24 12:52:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:42,403 INFO L471 AbstractCegarLoop]: Abstraction has 209611 states and 245789 transitions. [2018-07-24 12:52:42,403 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:52:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 209611 states and 245789 transitions. [2018-07-24 12:52:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-07-24 12:52:42,624 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:42,624 INFO L353 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:42,625 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1836363141, now seen corresponding path program 1 times [2018-07-24 12:52:42,625 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:42,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:42,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:42,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:42,626 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 358 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:43,218 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:43,218 INFO L191 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 [2018-07-24 12:52:43,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:43,230 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:43,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:43,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 297 proven. 65 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-07-24 12:52:44,264 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:44,265 INFO L191 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 [2018-07-24 12:52:44,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:44,286 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:45,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 292 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:45,922 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 361 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:46,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:46,353 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 11, 8] total 28 [2018-07-24 12:52:46,353 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:46,354 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:52:46,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:52:46,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2018-07-24 12:52:46,355 INFO L87 Difference]: Start difference. First operand 209611 states and 245789 transitions. Second operand 13 states. [2018-07-24 12:53:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:28,056 INFO L93 Difference]: Finished difference Result 621773 states and 883444 transitions. [2018-07-24 12:53:28,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-24 12:53:28,057 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 445 [2018-07-24 12:53:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:31,520 INFO L225 Difference]: With dead ends: 621773 [2018-07-24 12:53:31,521 INFO L226 Difference]: Without dead ends: 445407 [2018-07-24 12:53:31,845 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1957 GetRequests, 1824 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6165 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2375, Invalid=15181, Unknown=0, NotChecked=0, Total=17556 [2018-07-24 12:53:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445407 states. [2018-07-24 12:53:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445407 to 395404. [2018-07-24 12:53:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395404 states. [2018-07-24 12:53:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395404 states to 395404 states and 459433 transitions. [2018-07-24 12:53:43,544 INFO L78 Accepts]: Start accepts. Automaton has 395404 states and 459433 transitions. Word has length 445 [2018-07-24 12:53:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:43,545 INFO L471 AbstractCegarLoop]: Abstraction has 395404 states and 459433 transitions. [2018-07-24 12:53:43,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:53:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 395404 states and 459433 transitions. [2018-07-24 12:53:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-07-24 12:53:45,347 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:45,348 INFO L353 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:45,348 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:53:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash 251542276, now seen corresponding path program 1 times [2018-07-24 12:53:45,349 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:45,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:45,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:45,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:45,350 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-24 12:53:45,629 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:53:45,635 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:53:45,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:53:45 BoogieIcfgContainer [2018-07-24 12:53:45,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:53:45,636 INFO L168 Benchmark]: Toolchain (without parser) took 213307.72 ms. Allocated memory was 1.5 GB in the beginning and 5.1 GB in the end (delta: 3.6 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-07-24 12:53:45,637 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-07-24 12:53:45,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1269.21 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:53:45,639 INFO L168 Benchmark]: Boogie Procedure Inliner took 182.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:53:45,639 INFO L168 Benchmark]: Boogie Preprocessor took 406.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -938.7 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:53:45,640 INFO L168 Benchmark]: RCFGBuilder took 5600.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 291.4 MB). Peak memory consumption was 291.4 MB. Max. memory is 7.1 GB. [2018-07-24 12:53:45,641 INFO L168 Benchmark]: TraceAbstraction took 205841.72 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.8 GB). Free memory was 1.9 GB in the beginning and 2.9 GB in the end (delta: -953.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-07-24 12:53:45,651 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1269.21 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 182.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 406.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -938.7 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5600.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 291.4 MB). Peak memory consumption was 291.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205841.72 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.8 GB). Free memory was 1.9 GB in the beginning and 2.9 GB in the end (delta: -953.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1644]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1644). Cancelled while BasicCegarLoop was analyzing trace of length 449 with TraceHistMax 5, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 447 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 205.7s OverallTime, 17 OverallIterations, 5 TraceHistogramMax, 125.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3767 SDtfs, 21674 SDslu, 6468 SDs, 0 SdLazy, 34639 SolverSat, 7445 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13890 GetRequests, 13533 SyntacticMatches, 37 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7121 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=395404occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 44.8s AutomataMinimizationTime, 16 MinimizatonAttempts, 70363 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 8.5s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 11787 NumberOfCodeBlocks, 11787 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 18503 ConstructedInterpolants, 0 QuantifiedInterpolants, 14620862 SizeOfPredicates, 36 NumberOfNonLiveVariables, 24648 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 56 InterpolantComputations, 10 PerfectInterpolantSequences, 9959/11277 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label18_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-53-45-676.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label18_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-53-45-676.csv Completed graceful shutdown