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_label23_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:51:32,993 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:51:32,995 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:51:33,013 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:51:33,013 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:51:33,014 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:51:33,018 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:51:33,021 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:51:33,023 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:51:33,026 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:51:33,029 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:51:33,029 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:51:33,030 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:51:33,031 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:51:33,034 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:51:33,035 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:51:33,036 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:51:33,038 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:51:33,047 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:51:33,054 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:51:33,056 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:51:33,059 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:51:33,064 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:51:33,064 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:51:33,064 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:51:33,065 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:51:33,068 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:51:33,069 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:51:33,070 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:51:33,071 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:51:33,071 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:51:33,072 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:51:33,072 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:51:33,072 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:51:33,073 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:51:33,074 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:51:33,074 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 12:51:33,090 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:51:33,090 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:51:33,091 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:51:33,091 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:51:33,091 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:51:33,092 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:51:33,092 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:51:33,092 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:51:33,092 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:51:33,092 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:51:33,093 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:51:33,093 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:51:33,094 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:51:33,094 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:51:33,094 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:51:33,094 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:51:33,094 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:51:33,095 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:51:33,095 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:51:33,095 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:51:33,095 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:51:33,095 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:51:33,096 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:51:33,096 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:51:33,096 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:51:33,096 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:51:33,097 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:51:33,097 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:51:33,097 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:51:33,097 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:51:33,097 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:51:33,098 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:51:33,098 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:51:33,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:51:33,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:51:33,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:51:33,169 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:51:33,170 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:51:33,170 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-07-24 12:51:33,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c502f9c3c/f71a599abaff40298927eaac8b715312/FLAG9e19ffa32 [2018-07-24 12:51:33,856 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:51:33,857 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-07-24 12:51:33,884 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c502f9c3c/f71a599abaff40298927eaac8b715312/FLAG9e19ffa32 [2018-07-24 12:51:33,906 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c502f9c3c/f71a599abaff40298927eaac8b715312 [2018-07-24 12:51:33,917 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:51:33,921 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:51:33,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:51:33,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:51:33,930 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:51:33,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:51:33" (1/1) ... [2018-07-24 12:51:33,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f57add1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:33, skipping insertion in model container [2018-07-24 12:51:33,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:51:33" (1/1) ... [2018-07-24 12:51:34,253 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:51:34,845 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:51:34,863 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:51:35,151 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:51:35,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35 WrapperNode [2018-07-24 12:51:35,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:51:35,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:51:35,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:51:35,234 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:51:35,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:51:35,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:51:35,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:51:35,391 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:51:35,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (1/1) ... [2018-07-24 12:51:35,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:51:35,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:51:35,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:51:35,795 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:51:35,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (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 12:51:35,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:51:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:51:35,881 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 12:51:35,881 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 12:51:35,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:51:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:51:35,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:51:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:51:41,347 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:51:41,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:51:41 BoogieIcfgContainer [2018-07-24 12:51:41,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:51:41,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:51:41,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:51:41,363 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:51:41,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:51:33" (1/3) ... [2018-07-24 12:51:41,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464c12cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:51:41, skipping insertion in model container [2018-07-24 12:51:41,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:35" (2/3) ... [2018-07-24 12:51:41,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464c12cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:51:41, skipping insertion in model container [2018-07-24 12:51:41,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:51:41" (3/3) ... [2018-07-24 12:51:41,370 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label23_true-unreach-call.c [2018-07-24 12:51:41,383 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:51:41,400 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:51:41,458 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:51:41,458 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:51:41,459 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:51:41,459 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:51:41,459 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:51:41,459 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:51:41,459 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:51:41,460 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:51:41,460 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:51:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:51:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-24 12:51:41,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:41,509 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] [2018-07-24 12:51:41,509 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 12:51:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1250104911, now seen corresponding path program 1 times [2018-07-24 12:51:41,519 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:41,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:41,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:41,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:41,569 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:42,434 WARN L169 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:51:42,670 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 12:51:42,672 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:42,673 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:42,673 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:42,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:42,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:42,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:42,699 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:51:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:44,879 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-07-24 12:51:44,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:44,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2018-07-24 12:51:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:44,905 INFO L225 Difference]: With dead ends: 838 [2018-07-24 12:51:44,906 INFO L226 Difference]: Without dead ends: 524 [2018-07-24 12:51:44,914 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-07-24 12:51:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-07-24 12:51:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-07-24 12:51:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-07-24 12:51:45,019 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 178 [2018-07-24 12:51:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:45,020 INFO L471 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-07-24 12:51:45,020 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-07-24 12:51:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-24 12:51:45,036 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:45,036 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:45,039 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 12:51:45,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1590252200, now seen corresponding path program 1 times [2018-07-24 12:51:45,039 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:45,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:45,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:45,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:45,041 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:45,442 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:45,442 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:51:45,442 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:45,444 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:51:45,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:51:45,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:51:45,445 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-07-24 12:51:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:49,441 INFO L93 Difference]: Finished difference Result 1271 states and 2186 transitions. [2018-07-24 12:51:49,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:51:49,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2018-07-24 12:51:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:49,448 INFO L225 Difference]: With dead ends: 1271 [2018-07-24 12:51:49,448 INFO L226 Difference]: Without dead ends: 755 [2018-07-24 12:51:49,454 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:51:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2018-07-24 12:51:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 739. [2018-07-24 12:51:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2018-07-24 12:51:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1100 transitions. [2018-07-24 12:51:49,516 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1100 transitions. Word has length 188 [2018-07-24 12:51:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:49,517 INFO L471 AbstractCegarLoop]: Abstraction has 739 states and 1100 transitions. [2018-07-24 12:51:49,517 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:51:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1100 transitions. [2018-07-24 12:51:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-24 12:51:49,522 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:49,522 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] [2018-07-24 12:51:49,522 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 12:51:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1010977333, now seen corresponding path program 1 times [2018-07-24 12:51:49,523 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:49,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:49,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:49,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:49,524 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:49,839 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 12:51:49,840 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:49,840 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:49,840 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:49,841 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:49,841 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:49,842 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:49,842 INFO L87 Difference]: Start difference. First operand 739 states and 1100 transitions. Second operand 3 states. [2018-07-24 12:51:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:52,685 INFO L93 Difference]: Finished difference Result 2117 states and 3231 transitions. [2018-07-24 12:51:52,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:52,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2018-07-24 12:51:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:52,700 INFO L225 Difference]: With dead ends: 2117 [2018-07-24 12:51:52,700 INFO L226 Difference]: Without dead ends: 1384 [2018-07-24 12:51:52,704 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2018-07-24 12:51:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1382. [2018-07-24 12:51:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1382 states. [2018-07-24 12:51:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 1971 transitions. [2018-07-24 12:51:52,768 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 1971 transitions. Word has length 191 [2018-07-24 12:51:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:52,769 INFO L471 AbstractCegarLoop]: Abstraction has 1382 states and 1971 transitions. [2018-07-24 12:51:52,769 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 1971 transitions. [2018-07-24 12:51:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-24 12:51:52,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:52,778 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:51:52,778 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 12:51:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1402232081, now seen corresponding path program 1 times [2018-07-24 12:51:52,779 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:52,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:52,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:52,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:52,780 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:53,197 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2018-07-24 12:51:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:53,320 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:53,320 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:51:53,320 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:53,321 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:51:53,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:51:53,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:51:53,321 INFO L87 Difference]: Start difference. First operand 1382 states and 1971 transitions. Second operand 6 states. [2018-07-24 12:51:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:56,118 INFO L93 Difference]: Finished difference Result 3917 states and 5701 transitions. [2018-07-24 12:51:56,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 12:51:56,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2018-07-24 12:51:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:56,137 INFO L225 Difference]: With dead ends: 3917 [2018-07-24 12:51:56,137 INFO L226 Difference]: Without dead ends: 2541 [2018-07-24 12:51:56,144 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:51:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2018-07-24 12:51:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2498. [2018-07-24 12:51:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2498 states. [2018-07-24 12:51:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3431 transitions. [2018-07-24 12:51:56,245 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3431 transitions. Word has length 193 [2018-07-24 12:51:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:56,246 INFO L471 AbstractCegarLoop]: Abstraction has 2498 states and 3431 transitions. [2018-07-24 12:51:56,246 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:51:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3431 transitions. [2018-07-24 12:51:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-24 12:51:56,255 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:56,255 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:56,256 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 12:51:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -862362611, now seen corresponding path program 1 times [2018-07-24 12:51:56,256 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:56,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:56,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:56,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:56,258 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:56,664 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:56,664 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 12:51:56,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:56,674 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:56,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:51:57,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:51:57,954 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:51:57,954 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 12:51:57,954 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:57,955 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:51:57,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:51:57,955 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:51:57,956 INFO L87 Difference]: Start difference. First operand 2498 states and 3431 transitions. Second operand 5 states. [2018-07-24 12:52:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:01,377 INFO L93 Difference]: Finished difference Result 7710 states and 11153 transitions. [2018-07-24 12:52:01,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:52:01,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2018-07-24 12:52:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:01,412 INFO L225 Difference]: With dead ends: 7710 [2018-07-24 12:52:01,412 INFO L226 Difference]: Without dead ends: 5218 [2018-07-24 12:52:01,430 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:52:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2018-07-24 12:52:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5130. [2018-07-24 12:52:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2018-07-24 12:52:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6928 transitions. [2018-07-24 12:52:01,604 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6928 transitions. Word has length 206 [2018-07-24 12:52:01,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:01,605 INFO L471 AbstractCegarLoop]: Abstraction has 5130 states and 6928 transitions. [2018-07-24 12:52:01,605 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:52:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6928 transitions. [2018-07-24 12:52:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-07-24 12:52:01,622 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:01,622 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:01,622 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 12:52:01,623 INFO L82 PathProgramCache]: Analyzing trace with hash 849510229, now seen corresponding path program 1 times [2018-07-24 12:52:01,623 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:01,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:01,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:01,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:01,624 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:01,890 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:52:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:02,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:02,231 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 12:52:02,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:02,240 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:02,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:52:02,618 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:03,199 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:52:03,199 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 12:52:03,199 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:03,200 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:52:03,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:52:03,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:52:03,201 INFO L87 Difference]: Start difference. First operand 5130 states and 6928 transitions. Second operand 5 states. [2018-07-24 12:52:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:06,237 INFO L93 Difference]: Finished difference Result 15772 states and 22510 transitions. [2018-07-24 12:52:06,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:52:06,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2018-07-24 12:52:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:06,299 INFO L225 Difference]: With dead ends: 15772 [2018-07-24 12:52:06,299 INFO L226 Difference]: Without dead ends: 10648 [2018-07-24 12:52:06,334 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 414 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:52:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2018-07-24 12:52:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 10000. [2018-07-24 12:52:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10000 states. [2018-07-24 12:52:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 13229 transitions. [2018-07-24 12:52:06,627 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 13229 transitions. Word has length 210 [2018-07-24 12:52:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:06,627 INFO L471 AbstractCegarLoop]: Abstraction has 10000 states and 13229 transitions. [2018-07-24 12:52:06,627 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:52:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 13229 transitions. [2018-07-24 12:52:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-24 12:52:06,653 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:06,654 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:06,654 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 12:52:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1812419614, now seen corresponding path program 1 times [2018-07-24 12:52:06,655 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:06,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:06,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:06,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:06,657 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:07,205 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:52:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:07,404 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:07,404 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:07,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:07,422 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:07,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:08,064 WARN L169 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:52:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:08,102 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:08,503 WARN L169 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-07-24 12:52:08,908 WARN L169 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-07-24 12:52:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:09,487 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:09,487 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:09,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:09,519 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:10,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:10,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:10,912 WARN L169 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-07-24 12:52:11,136 WARN L169 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-07-24 12:52:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:11,505 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:11,506 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 14 [2018-07-24 12:52:11,506 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:11,506 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:52:11,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:52:11,507 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:52:11,507 INFO L87 Difference]: Start difference. First operand 10000 states and 13229 transitions. Second operand 7 states. [2018-07-24 12:52:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:20,543 INFO L93 Difference]: Finished difference Result 39107 states and 61577 transitions. [2018-07-24 12:52:20,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 12:52:20,544 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 215 [2018-07-24 12:52:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:20,770 INFO L225 Difference]: With dead ends: 39107 [2018-07-24 12:52:20,771 INFO L226 Difference]: Without dead ends: 29113 [2018-07-24 12:52:20,875 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 854 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2018-07-24 12:52:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29113 states. [2018-07-24 12:52:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29113 to 28236. [2018-07-24 12:52:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28236 states. [2018-07-24 12:52:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28236 states to 28236 states and 37547 transitions. [2018-07-24 12:52:22,099 INFO L78 Accepts]: Start accepts. Automaton has 28236 states and 37547 transitions. Word has length 215 [2018-07-24 12:52:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:22,099 INFO L471 AbstractCegarLoop]: Abstraction has 28236 states and 37547 transitions. [2018-07-24 12:52:22,100 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:52:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 28236 states and 37547 transitions. [2018-07-24 12:52:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-24 12:52:22,143 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:22,144 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:22,144 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 12:52:22,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1528109442, now seen corresponding path program 1 times [2018-07-24 12:52:22,144 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:22,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:22,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:22,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:22,146 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:22,682 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:52:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:22,875 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:22,875 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:22,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:22,892 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:23,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:23,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:24,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:24,174 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:24,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:24,190 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:24,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:52:24,748 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:25,147 WARN L169 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-07-24 12:52:25,341 WARN L169 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-07-24 12:52:25,733 WARN L169 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-07-24 12:52:25,877 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:52:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:52:26,004 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:52:26,004 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 8, 8, 5] total 15 [2018-07-24 12:52:26,004 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:26,004 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:52:26,005 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:52:26,005 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:52:26,005 INFO L87 Difference]: Start difference. First operand 28236 states and 37547 transitions. Second operand 5 states. [2018-07-24 12:52:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:28,615 INFO L93 Difference]: Finished difference Result 66243 states and 88212 transitions. [2018-07-24 12:52:28,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:52:28,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-07-24 12:52:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:28,735 INFO L225 Difference]: With dead ends: 66243 [2018-07-24 12:52:28,735 INFO L226 Difference]: Without dead ends: 39723 [2018-07-24 12:52:28,790 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 859 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:52:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39723 states. [2018-07-24 12:52:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39723 to 39648. [2018-07-24 12:52:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39648 states. [2018-07-24 12:52:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39648 states to 39648 states and 51607 transitions. [2018-07-24 12:52:29,666 INFO L78 Accepts]: Start accepts. Automaton has 39648 states and 51607 transitions. Word has length 217 [2018-07-24 12:52:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:29,666 INFO L471 AbstractCegarLoop]: Abstraction has 39648 states and 51607 transitions. [2018-07-24 12:52:29,666 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:52:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 39648 states and 51607 transitions. [2018-07-24 12:52:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-24 12:52:29,699 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:29,699 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:52:29,699 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 12:52:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash 127957468, now seen corresponding path program 1 times [2018-07-24 12:52:29,700 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:29,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:29,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:29,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:29,701 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:30,041 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:30,042 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:30,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:30,049 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:30,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:52:30,389 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 42 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:30,716 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:52:30,716 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-07-24 12:52:30,716 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:30,717 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:52:30,717 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:52:30,717 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:52:30,717 INFO L87 Difference]: Start difference. First operand 39648 states and 51607 transitions. Second operand 5 states. [2018-07-24 12:52:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:34,340 INFO L93 Difference]: Finished difference Result 99232 states and 130811 transitions. [2018-07-24 12:52:34,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:52:34,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2018-07-24 12:52:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:34,583 INFO L225 Difference]: With dead ends: 99232 [2018-07-24 12:52:34,583 INFO L226 Difference]: Without dead ends: 59595 [2018-07-24 12:52:34,672 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:52:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59595 states. [2018-07-24 12:52:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59595 to 59100. [2018-07-24 12:52:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59100 states. [2018-07-24 12:52:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59100 states to 59100 states and 76428 transitions. [2018-07-24 12:52:35,890 INFO L78 Accepts]: Start accepts. Automaton has 59100 states and 76428 transitions. Word has length 226 [2018-07-24 12:52:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:35,891 INFO L471 AbstractCegarLoop]: Abstraction has 59100 states and 76428 transitions. [2018-07-24 12:52:35,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:52:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 59100 states and 76428 transitions. [2018-07-24 12:52:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-07-24 12:52:35,928 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:35,929 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:52:35,929 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 12:52:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1354142495, now seen corresponding path program 1 times [2018-07-24 12:52:35,929 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:35,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:35,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:35,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:35,931 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:36,343 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:36,343 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 12:52:36,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:36,353 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:36,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:52:36,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:37,171 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:37,171 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 12:52:37,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:37,188 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:37,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-07-24 12:52:38,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 61 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:38,926 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:38,926 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 6, 8] total 29 [2018-07-24 12:52:38,927 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:38,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:52:38,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:52:38,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2018-07-24 12:52:38,928 INFO L87 Difference]: Start difference. First operand 59100 states and 76428 transitions. Second operand 15 states. [2018-07-24 12:52:50,102 WARN L169 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:52:53,241 WARN L169 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:52:53,885 WARN L169 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-07-24 12:52:54,380 WARN L169 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:53:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:04,487 INFO L93 Difference]: Finished difference Result 196134 states and 268493 transitions. [2018-07-24 12:53:04,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-24 12:53:04,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 238 [2018-07-24 12:53:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:04,992 INFO L225 Difference]: With dead ends: 196134 [2018-07-24 12:53:04,992 INFO L226 Difference]: Without dead ends: 137070 [2018-07-24 12:53:05,120 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1165 GetRequests, 966 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16095 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=5058, Invalid=34344, Unknown=0, NotChecked=0, Total=39402 [2018-07-24 12:53:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137070 states. [2018-07-24 12:53:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137070 to 134813. [2018-07-24 12:53:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134813 states. [2018-07-24 12:53:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134813 states to 134813 states and 170618 transitions. [2018-07-24 12:53:08,216 INFO L78 Accepts]: Start accepts. Automaton has 134813 states and 170618 transitions. Word has length 238 [2018-07-24 12:53:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:08,216 INFO L471 AbstractCegarLoop]: Abstraction has 134813 states and 170618 transitions. [2018-07-24 12:53:08,217 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 12:53:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 134813 states and 170618 transitions. [2018-07-24 12:53:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-24 12:53:08,258 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:08,259 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:53:08,259 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 12:53:08,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1153463933, now seen corresponding path program 1 times [2018-07-24 12:53:08,259 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:08,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:08,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:08,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:08,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:08,623 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 12:53:08,998 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:53:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 75 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:53:09,306 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:09,306 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 12:53:09,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:09,314 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:09,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:53:09,739 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:10,295 WARN L169 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-07-24 12:53:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 75 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:53:11,257 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:11,257 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:53:11,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:11,273 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:11,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:53:12,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:12,204 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-07-24 12:53:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 74 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:53:12,493 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:53:12,494 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 8, 8, 5] total 25 [2018-07-24 12:53:12,494 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:53:12,494 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:53:12,494 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:53:12,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:53:12,495 INFO L87 Difference]: Start difference. First operand 134813 states and 170618 transitions. Second operand 5 states. [2018-07-24 12:53:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:16,837 INFO L93 Difference]: Finished difference Result 313681 states and 401874 transitions. [2018-07-24 12:53:16,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:53:16,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 258 [2018-07-24 12:53:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:17,294 INFO L225 Difference]: With dead ends: 313681 [2018-07-24 12:53:17,294 INFO L226 Difference]: Without dead ends: 178879 [2018-07-24 12:53:17,539 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1017 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:53:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178879 states. [2018-07-24 12:53:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178879 to 174876. [2018-07-24 12:53:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174876 states. [2018-07-24 12:53:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174876 states to 174876 states and 216359 transitions. [2018-07-24 12:53:21,362 INFO L78 Accepts]: Start accepts. Automaton has 174876 states and 216359 transitions. Word has length 258 [2018-07-24 12:53:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:21,363 INFO L471 AbstractCegarLoop]: Abstraction has 174876 states and 216359 transitions. [2018-07-24 12:53:21,363 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:53:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 174876 states and 216359 transitions. [2018-07-24 12:53:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-07-24 12:53:21,416 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:21,417 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:53:21,417 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 12:53:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash -787379418, now seen corresponding path program 1 times [2018-07-24 12:53:21,417 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:21,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:21,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:21,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:21,419 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 145 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:53:21,772 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:21,772 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:53:21,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:21,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:22,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:53:22,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:53:22,376 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:53:22,376 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:53:22,376 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:53:22,377 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:53:22,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:53:22,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:53:22,377 INFO L87 Difference]: Start difference. First operand 174876 states and 216359 transitions. Second operand 3 states. [2018-07-24 12:53:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:27,346 INFO L93 Difference]: Finished difference Result 449705 states and 556718 transitions. [2018-07-24 12:53:27,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:53:27,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 307 [2018-07-24 12:53:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:28,090 INFO L225 Difference]: With dead ends: 449705 [2018-07-24 12:53:28,091 INFO L226 Difference]: Without dead ends: 277805 [2018-07-24 12:53:28,362 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 612 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:53:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277805 states. [2018-07-24 12:53:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277805 to 277606. [2018-07-24 12:53:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277606 states. [2018-07-24 12:53:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277606 states to 277606 states and 340655 transitions. [2018-07-24 12:53:42,383 INFO L78 Accepts]: Start accepts. Automaton has 277606 states and 340655 transitions. Word has length 307 [2018-07-24 12:53:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:42,384 INFO L471 AbstractCegarLoop]: Abstraction has 277606 states and 340655 transitions. [2018-07-24 12:53:42,384 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:53:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 277606 states and 340655 transitions. [2018-07-24 12:53:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-07-24 12:53:42,449 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:42,449 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:42,449 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 12:53:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1981053048, now seen corresponding path program 1 times [2018-07-24 12:53:42,450 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:42,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:42,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:42,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:42,452 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 207 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:53:42,895 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:42,895 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 12:53:42,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:42,905 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:43,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:53:43,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 207 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 12:53:43,745 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:43,745 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 12:53:43,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:43,761 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:44,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-07-24 12:53:44,675 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 139 proven. 70 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-07-24 12:53:45,071 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:53:45,071 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 17 [2018-07-24 12:53:45,071 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:53:45,072 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:53:45,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:53:45,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:53:45,073 INFO L87 Difference]: Start difference. First operand 277606 states and 340655 transitions. Second operand 5 states. [2018-07-24 12:53:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:49,948 INFO L93 Difference]: Finished difference Result 523527 states and 638887 transitions. [2018-07-24 12:53:49,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:53:49,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2018-07-24 12:53:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:50,903 INFO L225 Difference]: With dead ends: 523527 [2018-07-24 12:53:50,903 INFO L226 Difference]: Without dead ends: 296205 [2018-07-24 12:53:51,204 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1309 GetRequests, 1293 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:53:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296205 states. [2018-07-24 12:53:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296205 to 296123. [2018-07-24 12:53:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296123 states. [2018-07-24 12:53:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296123 states to 296123 states and 361542 transitions. [2018-07-24 12:53:57,400 INFO L78 Accepts]: Start accepts. Automaton has 296123 states and 361542 transitions. Word has length 326 [2018-07-24 12:53:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:57,401 INFO L471 AbstractCegarLoop]: Abstraction has 296123 states and 361542 transitions. [2018-07-24 12:53:57,401 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:53:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 296123 states and 361542 transitions. [2018-07-24 12:53:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-07-24 12:53:57,485 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:57,485 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:53:57,486 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 12:53:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash -550126743, now seen corresponding path program 1 times [2018-07-24 12:53:57,486 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:57,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:57,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:57,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:57,487 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 151 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 12:53:59,069 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:59,069 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 12:53:59,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:59,090 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:59,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:53:59,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:53:59,568 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:59,568 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:53:59,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:59,585 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:00,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:54:00,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:54:00,602 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:54:00,602 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-07-24 12:54:00,602 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:54:00,603 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:54:00,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:54:00,603 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:54:00,604 INFO L87 Difference]: Start difference. First operand 296123 states and 361542 transitions. Second operand 8 states. [2018-07-24 12:54:01,955 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:54:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:13,698 INFO L93 Difference]: Finished difference Result 764780 states and 958481 transitions. [2018-07-24 12:54:13,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-24 12:54:13,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 328 [2018-07-24 12:54:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:15,209 INFO L225 Difference]: With dead ends: 764780 [2018-07-24 12:54:15,209 INFO L226 Difference]: Without dead ends: 470757 [2018-07-24 12:54:16,673 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1369 GetRequests, 1327 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=1403, Unknown=0, NotChecked=0, Total=1722 [2018-07-24 12:54:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470757 states. [2018-07-24 12:54:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470757 to 461436. [2018-07-24 12:54:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461436 states. [2018-07-24 12:54:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461436 states to 461436 states and 541704 transitions. [2018-07-24 12:54:34,301 INFO L78 Accepts]: Start accepts. Automaton has 461436 states and 541704 transitions. Word has length 328 [2018-07-24 12:54:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:34,302 INFO L471 AbstractCegarLoop]: Abstraction has 461436 states and 541704 transitions. [2018-07-24 12:54:34,302 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:54:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 461436 states and 541704 transitions. [2018-07-24 12:54:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-07-24 12:54:34,378 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:34,378 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:34,379 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 12:54:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash 13108100, now seen corresponding path program 1 times [2018-07-24 12:54:34,379 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:34,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:34,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:34,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:34,380 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:34,781 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 12:54:35,123 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:54:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 150 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:54:35,589 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:35,589 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 12:54:35,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:35,597 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:35,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-07-24 12:54:36,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 152 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:54:37,878 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:54:37,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-07-24 12:54:37,879 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:37,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:54:37,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:54:37,879 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:54:37,880 INFO L87 Difference]: Start difference. First operand 461436 states and 541704 transitions. Second operand 5 states. [2018-07-24 12:54:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:50,349 INFO L93 Difference]: Finished difference Result 1251407 states and 1501851 transitions. [2018-07-24 12:54:50,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:54:50,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2018-07-24 12:54:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:54,648 INFO L225 Difference]: With dead ends: 1251407 [2018-07-24 12:54:54,648 INFO L226 Difference]: Without dead ends: 798127 [2018-07-24 12:54:55,208 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 658 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:54:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798127 states. Received shutdown request... [2018-07-24 12:54:56,319 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:54:56,324 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:54:56,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:54:56 BoogieIcfgContainer [2018-07-24 12:54:56,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:54:56,329 INFO L168 Benchmark]: Toolchain (without parser) took 202410.76 ms. Allocated memory was 1.5 GB in the beginning and 5.7 GB in the end (delta: 4.2 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -215.0 MB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. [2018-07-24 12:54:56,330 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:54:56,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1310.22 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 12:54:56,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 157.12 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 12:54:56,336 INFO L168 Benchmark]: Boogie Preprocessor took 403.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -932.0 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:54:56,337 INFO L168 Benchmark]: RCFGBuilder took 5559.02 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: 286.1 MB). Peak memory consumption was 286.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:54:56,343 INFO L168 Benchmark]: TraceAbstraction took 194973.37 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.4 GB). Free memory was 1.9 GB in the beginning and 1.6 GB in the end (delta: 325.2 MB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. [2018-07-24 12:54:56,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1310.22 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 157.12 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 403.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -932.0 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5559.02 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: 286.1 MB). Peak memory consumption was 286.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 194973.37 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.4 GB). Free memory was 1.9 GB in the beginning and 1.6 GB in the end (delta: 325.2 MB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1548]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1548). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 194.8s OverallTime, 15 OverallIterations, 4 TraceHistogramMax, 111.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3268 SDtfs, 22779 SDslu, 4571 SDs, 0 SdLazy, 28395 SolverSat, 7360 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9278 GetRequests, 8867 SyntacticMatches, 26 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16915 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=461436occurred in iteration=14, 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: 49.9s AutomataMinimizationTime, 15 MinimizatonAttempts, 18108 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 23.3s InterpolantComputationTime, 8060 NumberOfCodeBlocks, 8060 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 12457 ConstructedInterpolants, 0 QuantifiedInterpolants, 9331188 SizeOfPredicates, 98 NumberOfNonLiveVariables, 19540 ConjunctsInSsa, 292 ConjunctsInUnsatCore, 49 InterpolantComputations, 13 PerfectInterpolantSequences, 4709/5106 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_label23_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-54-56-361.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label23_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-54-56-361.csv Completed graceful shutdown