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_label26_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 11:01:21,958 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 11:01:21,960 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 11:01:21,976 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 11:01:21,976 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 11:01:21,978 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 11:01:21,980 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 11:01:21,983 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 11:01:21,986 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 11:01:21,987 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 11:01:21,989 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 11:01:21,989 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 11:01:21,990 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 11:01:21,992 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 11:01:21,993 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 11:01:21,996 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 11:01:21,997 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 11:01:22,000 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 11:01:22,008 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 11:01:22,013 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 11:01:22,014 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 11:01:22,017 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 11:01:22,021 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 11:01:22,021 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 11:01:22,021 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 11:01:22,023 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 11:01:22,024 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 11:01:22,025 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 11:01:22,026 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 11:01:22,027 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 11:01:22,027 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 11:01:22,032 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 11:01:22,032 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 11:01:22,034 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 11:01:22,035 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 11:01:22,036 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 11:01:22,037 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 11:01:22,062 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 11:01:22,063 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 11:01:22,063 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 11:01:22,064 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 11:01:22,064 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 11:01:22,064 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 11:01:22,064 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 11:01:22,065 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 11:01:22,065 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 11:01:22,065 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 11:01:22,065 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 11:01:22,066 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 11:01:22,066 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 11:01:22,066 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 11:01:22,066 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 11:01:22,067 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 11:01:22,067 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 11:01:22,067 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 11:01:22,067 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 11:01:22,067 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 11:01:22,068 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 11:01:22,068 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 11:01:22,068 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 11:01:22,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:01:22,068 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 11:01:22,069 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 11:01:22,069 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 11:01:22,069 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 11:01:22,069 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 11:01:22,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 11:01:22,069 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 11:01:22,070 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 11:01:22,070 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 11:01:22,126 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 11:01:22,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 11:01:22,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 11:01:22,153 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 11:01:22,153 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 11:01:22,154 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label26_false-unreach-call.c [2018-07-24 11:01:22,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0c322d9/086eb0c11f3f40a896e0a3897a626693/FLAG48255c270 [2018-07-24 11:01:22,793 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 11:01:22,794 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label26_false-unreach-call.c [2018-07-24 11:01:22,816 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0c322d9/086eb0c11f3f40a896e0a3897a626693/FLAG48255c270 [2018-07-24 11:01:22,833 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0c322d9/086eb0c11f3f40a896e0a3897a626693 [2018-07-24 11:01:22,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 11:01:22,846 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 11:01:22,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 11:01:22,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 11:01:22,853 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 11:01:22,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:01:22" (1/1) ... [2018-07-24 11:01:22,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8a088d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:22, skipping insertion in model container [2018-07-24 11:01:22,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:01:22" (1/1) ... [2018-07-24 11:01:23,079 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 11:01:23,566 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:01:23,586 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 11:01:23,875 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:01:23,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23 WrapperNode [2018-07-24 11:01:23,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 11:01:23,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 11:01:23,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 11:01:23,970 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 11:01:23,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 11:01:24,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 11:01:24,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 11:01:24,133 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 11:01:24,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (1/1) ... [2018-07-24 11:01:24,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 11:01:24,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 11:01:24,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 11:01:24,500 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 11:01:24,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (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 11:01:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 11:01:24,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 11:01:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 11:01:24,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 11:01:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 11:01:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 11:01:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:01:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:01:30,001 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 11:01:30,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:01:30 BoogieIcfgContainer [2018-07-24 11:01:30,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 11:01:30,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 11:01:30,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 11:01:30,014 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 11:01:30,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 11:01:22" (1/3) ... [2018-07-24 11:01:30,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39262515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:01:30, skipping insertion in model container [2018-07-24 11:01:30,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:23" (2/3) ... [2018-07-24 11:01:30,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39262515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:01:30, skipping insertion in model container [2018-07-24 11:01:30,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:01:30" (3/3) ... [2018-07-24 11:01:30,020 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label26_false-unreach-call.c [2018-07-24 11:01:30,028 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 11:01:30,037 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 11:01:30,092 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 11:01:30,093 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 11:01:30,093 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 11:01:30,093 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 11:01:30,093 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 11:01:30,093 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 11:01:30,094 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 11:01:30,094 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 11:01:30,094 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 11:01:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 11:01:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-24 11:01:30,139 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:30,140 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] [2018-07-24 11:01:30,140 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1149775236, now seen corresponding path program 1 times [2018-07-24 11:01:30,147 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:30,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:30,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:30,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:30,194 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:31,094 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:01:31,291 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 11:01:31,293 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:31,294 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:01:31,294 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:31,300 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:31,318 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:31,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:31,322 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 11:01:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:33,345 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-07-24 11:01:33,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:33,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2018-07-24 11:01:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:33,375 INFO L225 Difference]: With dead ends: 844 [2018-07-24 11:01:33,375 INFO L226 Difference]: Without dead ends: 530 [2018-07-24 11:01:33,383 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-07-24 11:01:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-07-24 11:01:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-07-24 11:01:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-07-24 11:01:33,470 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 163 [2018-07-24 11:01:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:33,472 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-07-24 11:01:33,472 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-07-24 11:01:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-24 11:01:33,480 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:33,481 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] [2018-07-24 11:01:33,481 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:33,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1905376360, now seen corresponding path program 1 times [2018-07-24 11:01:33,482 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:33,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:33,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:33,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:33,487 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:34,025 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 11:01:34,026 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:34,026 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:01:34,026 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:34,028 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:34,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:34,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:34,029 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-07-24 11:01:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:36,231 INFO L93 Difference]: Finished difference Result 1477 states and 2511 transitions. [2018-07-24 11:01:36,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:36,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2018-07-24 11:01:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:36,240 INFO L225 Difference]: With dead ends: 1477 [2018-07-24 11:01:36,240 INFO L226 Difference]: Without dead ends: 958 [2018-07-24 11:01:36,246 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 11:01:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-07-24 11:01:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2018-07-24 11:01:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-07-24 11:01:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1546 transitions. [2018-07-24 11:01:36,292 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1546 transitions. Word has length 176 [2018-07-24 11:01:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:36,293 INFO L471 AbstractCegarLoop]: Abstraction has 943 states and 1546 transitions. [2018-07-24 11:01:36,293 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1546 transitions. [2018-07-24 11:01:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-24 11:01:36,299 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:36,299 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:36,299 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:36,300 INFO L82 PathProgramCache]: Analyzing trace with hash -126993075, now seen corresponding path program 1 times [2018-07-24 11:01:36,300 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:36,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:36,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:36,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:36,301 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:36,589 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:36,589 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 11:01:36,589 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:36,590 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 11:01:36,590 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 11:01:36,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 11:01:36,591 INFO L87 Difference]: Start difference. First operand 943 states and 1546 transitions. Second operand 7 states. [2018-07-24 11:01:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:41,218 INFO L93 Difference]: Finished difference Result 2923 states and 5188 transitions. [2018-07-24 11:01:41,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 11:01:41,220 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2018-07-24 11:01:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:41,250 INFO L225 Difference]: With dead ends: 2923 [2018-07-24 11:01:41,250 INFO L226 Difference]: Without dead ends: 1986 [2018-07-24 11:01:41,255 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:01:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2018-07-24 11:01:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1885. [2018-07-24 11:01:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2018-07-24 11:01:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3120 transitions. [2018-07-24 11:01:41,369 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3120 transitions. Word has length 181 [2018-07-24 11:01:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:41,369 INFO L471 AbstractCegarLoop]: Abstraction has 1885 states and 3120 transitions. [2018-07-24 11:01:41,369 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 11:01:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3120 transitions. [2018-07-24 11:01:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-24 11:01:41,380 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:41,380 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:41,380 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1273802114, now seen corresponding path program 1 times [2018-07-24 11:01:41,381 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:41,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:41,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:41,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:41,383 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:41,689 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:01:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:01:42,131 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:42,131 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 11:01:42,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:42,151 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:42,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 11:01:43,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:43,292 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 11:01:43,394 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 11:01:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:01:43,685 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:01:43,686 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 11:01:43,686 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:43,686 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:01:43,687 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:01:43,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:01:43,687 INFO L87 Difference]: Start difference. First operand 1885 states and 3120 transitions. Second operand 5 states. [2018-07-24 11:01:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:46,791 INFO L93 Difference]: Finished difference Result 6075 states and 10403 transitions. [2018-07-24 11:01:46,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:01:46,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2018-07-24 11:01:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:46,824 INFO L225 Difference]: With dead ends: 6075 [2018-07-24 11:01:46,824 INFO L226 Difference]: Without dead ends: 4196 [2018-07-24 11:01:46,836 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 368 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:01:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2018-07-24 11:01:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3894. [2018-07-24 11:01:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3894 states. [2018-07-24 11:01:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 6146 transitions. [2018-07-24 11:01:46,959 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 6146 transitions. Word has length 187 [2018-07-24 11:01:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:46,960 INFO L471 AbstractCegarLoop]: Abstraction has 3894 states and 6146 transitions. [2018-07-24 11:01:46,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:01:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 6146 transitions. [2018-07-24 11:01:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-24 11:01:46,970 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:46,971 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:46,971 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1647120681, now seen corresponding path program 1 times [2018-07-24 11:01:46,971 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:46,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:46,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:46,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:46,973 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:47,381 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:47,381 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 11:01:47,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:47,396 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:47,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:48,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:48,840 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:48,840 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:01:48,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:48,871 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:49,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:49,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:49,654 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:01:49,654 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 13 [2018-07-24 11:01:49,654 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:01:49,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 11:01:49,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 11:01:49,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 11:01:49,656 INFO L87 Difference]: Start difference. First operand 3894 states and 6146 transitions. Second operand 8 states. [2018-07-24 11:01:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:57,714 INFO L93 Difference]: Finished difference Result 25149 states and 47944 transitions. [2018-07-24 11:01:57,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 11:01:57,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 190 [2018-07-24 11:01:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:57,903 INFO L225 Difference]: With dead ends: 25149 [2018-07-24 11:01:57,904 INFO L226 Difference]: Without dead ends: 21261 [2018-07-24 11:01:57,979 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 756 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-07-24 11:01:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21261 states. [2018-07-24 11:01:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21261 to 21003. [2018-07-24 11:01:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21003 states. [2018-07-24 11:01:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21003 states to 21003 states and 34196 transitions. [2018-07-24 11:01:59,018 INFO L78 Accepts]: Start accepts. Automaton has 21003 states and 34196 transitions. Word has length 190 [2018-07-24 11:01:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:59,019 INFO L471 AbstractCegarLoop]: Abstraction has 21003 states and 34196 transitions. [2018-07-24 11:01:59,019 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 11:01:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 21003 states and 34196 transitions. [2018-07-24 11:01:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-24 11:01:59,106 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:59,106 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:59,107 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:59,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1915397278, now seen corresponding path program 1 times [2018-07-24 11:01:59,107 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:59,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:59,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:59,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:59,113 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:59,603 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:59,603 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:01:59,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:59,623 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:59,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:59,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:00,553 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:00,553 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:02:00,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:00,582 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:01,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:01,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:02,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:02,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-07-24 11:02:02,559 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:02,560 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:02:02,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:02:02,561 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:02,561 INFO L87 Difference]: Start difference. First operand 21003 states and 34196 transitions. Second operand 6 states. [2018-07-24 11:02:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:04,482 INFO L93 Difference]: Finished difference Result 41663 states and 67852 transitions. [2018-07-24 11:02:04,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 11:02:04,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 203 [2018-07-24 11:02:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:04,603 INFO L225 Difference]: With dead ends: 41663 [2018-07-24 11:02:04,604 INFO L226 Difference]: Without dead ends: 20666 [2018-07-24 11:02:04,669 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 804 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-07-24 11:02:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20666 states. [2018-07-24 11:02:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20666 to 20607. [2018-07-24 11:02:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20607 states. [2018-07-24 11:02:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20607 states to 20607 states and 32122 transitions. [2018-07-24 11:02:05,341 INFO L78 Accepts]: Start accepts. Automaton has 20607 states and 32122 transitions. Word has length 203 [2018-07-24 11:02:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:05,342 INFO L471 AbstractCegarLoop]: Abstraction has 20607 states and 32122 transitions. [2018-07-24 11:02:05,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:02:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20607 states and 32122 transitions. [2018-07-24 11:02:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-24 11:02:05,416 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:05,416 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:05,416 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1316613772, now seen corresponding path program 1 times [2018-07-24 11:02:05,417 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:05,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:05,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:05,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:05,418 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:06,080 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:02:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:06,184 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:06,184 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:02:06,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:06,194 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:06,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:06,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:06,558 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:02:06,558 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 11:02:06,558 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:06,559 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:02:06,559 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:02:06,559 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:02:06,560 INFO L87 Difference]: Start difference. First operand 20607 states and 32122 transitions. Second operand 3 states. [2018-07-24 11:02:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:07,973 INFO L93 Difference]: Finished difference Result 34930 states and 54140 transitions. [2018-07-24 11:02:07,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:02:07,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2018-07-24 11:02:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:08,056 INFO L225 Difference]: With dead ends: 34930 [2018-07-24 11:02:08,056 INFO L226 Difference]: Without dead ends: 20609 [2018-07-24 11:02:08,103 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 417 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:02:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2018-07-24 11:02:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 20607. [2018-07-24 11:02:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20607 states. [2018-07-24 11:02:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20607 states to 20607 states and 31430 transitions. [2018-07-24 11:02:08,594 INFO L78 Accepts]: Start accepts. Automaton has 20607 states and 31430 transitions. Word has length 209 [2018-07-24 11:02:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:08,595 INFO L471 AbstractCegarLoop]: Abstraction has 20607 states and 31430 transitions. [2018-07-24 11:02:08,595 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:02:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 20607 states and 31430 transitions. [2018-07-24 11:02:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-07-24 11:02:08,631 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:08,631 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:08,631 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:08,632 INFO L82 PathProgramCache]: Analyzing trace with hash 494355982, now seen corresponding path program 1 times [2018-07-24 11:02:08,632 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:08,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:08,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:08,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:08,633 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 11:02:08,918 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:02:08,919 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:02:08,919 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:08,919 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:02:08,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:02:08,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:02:08,920 INFO L87 Difference]: Start difference. First operand 20607 states and 31430 transitions. Second operand 3 states. [2018-07-24 11:02:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:11,060 INFO L93 Difference]: Finished difference Result 55182 states and 85973 transitions. [2018-07-24 11:02:11,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:02:11,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2018-07-24 11:02:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:11,188 INFO L225 Difference]: With dead ends: 55182 [2018-07-24 11:02:11,188 INFO L226 Difference]: Without dead ends: 34581 [2018-07-24 11:02:11,251 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 11:02:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34581 states. [2018-07-24 11:02:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34581 to 34260. [2018-07-24 11:02:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34260 states. [2018-07-24 11:02:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34260 states to 34260 states and 51643 transitions. [2018-07-24 11:02:11,996 INFO L78 Accepts]: Start accepts. Automaton has 34260 states and 51643 transitions. Word has length 211 [2018-07-24 11:02:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:11,997 INFO L471 AbstractCegarLoop]: Abstraction has 34260 states and 51643 transitions. [2018-07-24 11:02:11,997 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:02:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 34260 states and 51643 transitions. [2018-07-24 11:02:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-07-24 11:02:12,072 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:12,073 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:12,073 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2061163985, now seen corresponding path program 1 times [2018-07-24 11:02:12,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:12,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:12,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:12,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:12,075 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:12,685 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:12,685 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 11:02:12,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:12,693 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:12,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:13,047 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:13,245 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-07-24 11:02:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:13,683 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:13,684 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:02:13,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:13,702 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:14,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:14,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 104 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:15,364 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:15,365 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 23 [2018-07-24 11:02:15,365 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:15,366 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:02:15,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:02:15,366 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2018-07-24 11:02:15,367 INFO L87 Difference]: Start difference. First operand 34260 states and 51643 transitions. Second operand 9 states. [2018-07-24 11:02:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:28,852 INFO L93 Difference]: Finished difference Result 88283 states and 165402 transitions. [2018-07-24 11:02:28,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-24 11:02:28,852 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 268 [2018-07-24 11:02:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:29,331 INFO L225 Difference]: With dead ends: 88283 [2018-07-24 11:02:29,331 INFO L226 Difference]: Without dead ends: 54029 [2018-07-24 11:02:29,462 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1084 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=533, Invalid=3627, Unknown=0, NotChecked=0, Total=4160 [2018-07-24 11:02:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54029 states. [2018-07-24 11:02:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54029 to 47602. [2018-07-24 11:02:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47602 states. [2018-07-24 11:02:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47602 states to 47602 states and 68810 transitions. [2018-07-24 11:02:31,785 INFO L78 Accepts]: Start accepts. Automaton has 47602 states and 68810 transitions. Word has length 268 [2018-07-24 11:02:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:31,785 INFO L471 AbstractCegarLoop]: Abstraction has 47602 states and 68810 transitions. [2018-07-24 11:02:31,785 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:02:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 47602 states and 68810 transitions. [2018-07-24 11:02:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-07-24 11:02:31,862 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:31,862 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:02:31,862 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1578468091, now seen corresponding path program 1 times [2018-07-24 11:02:31,863 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:31,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:31,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:31,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:31,864 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 105 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:02:32,124 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:32,125 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:02:32,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:32,135 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:32,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:02:32,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 105 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:02:32,573 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:02:32,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 11:02:32,574 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:32,575 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:02:32,575 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:02:32,576 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:02:32,576 INFO L87 Difference]: Start difference. First operand 47602 states and 68810 transitions. Second operand 5 states. [2018-07-24 11:02:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:35,722 INFO L93 Difference]: Finished difference Result 123280 states and 186766 transitions. [2018-07-24 11:02:35,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:02:35,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2018-07-24 11:02:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:36,029 INFO L225 Difference]: With dead ends: 123280 [2018-07-24 11:02:36,029 INFO L226 Difference]: Without dead ends: 75895 [2018-07-24 11:02:36,156 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 542 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:02:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75895 states. [2018-07-24 11:02:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75895 to 73474. [2018-07-24 11:02:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73474 states. [2018-07-24 11:02:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73474 states to 73474 states and 103308 transitions. [2018-07-24 11:02:38,484 INFO L78 Accepts]: Start accepts. Automaton has 73474 states and 103308 transitions. Word has length 274 [2018-07-24 11:02:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:38,484 INFO L471 AbstractCegarLoop]: Abstraction has 73474 states and 103308 transitions. [2018-07-24 11:02:38,485 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:02:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 73474 states and 103308 transitions. [2018-07-24 11:02:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-07-24 11:02:38,581 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:38,581 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:38,581 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash -145781693, now seen corresponding path program 1 times [2018-07-24 11:02:38,582 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:38,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:38,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:38,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:38,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:38,851 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:38,851 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 11:02:38,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:38,860 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:39,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:39,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:39,319 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:39,319 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 11:02:39,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:39,336 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:39,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:39,996 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:40,124 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:40,124 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 11:02:40,125 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:40,125 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:02:40,126 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:02:40,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:02:40,126 INFO L87 Difference]: Start difference. First operand 73474 states and 103308 transitions. Second operand 9 states. [2018-07-24 11:02:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:48,032 INFO L93 Difference]: Finished difference Result 136272 states and 200127 transitions. [2018-07-24 11:02:48,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 11:02:48,033 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 275 [2018-07-24 11:02:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:48,303 INFO L225 Difference]: With dead ends: 136272 [2018-07-24 11:02:48,303 INFO L226 Difference]: Without dead ends: 63450 [2018-07-24 11:02:48,454 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1155 GetRequests, 1106 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1887, Unknown=0, NotChecked=0, Total=2352 [2018-07-24 11:02:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63450 states. [2018-07-24 11:02:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63450 to 60890. [2018-07-24 11:02:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60890 states. [2018-07-24 11:02:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60890 states to 60890 states and 75806 transitions. [2018-07-24 11:02:50,031 INFO L78 Accepts]: Start accepts. Automaton has 60890 states and 75806 transitions. Word has length 275 [2018-07-24 11:02:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:50,031 INFO L471 AbstractCegarLoop]: Abstraction has 60890 states and 75806 transitions. [2018-07-24 11:02:50,031 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:02:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 60890 states and 75806 transitions. [2018-07-24 11:02:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-07-24 11:02:50,072 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:50,072 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:02:50,072 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash -589471441, now seen corresponding path program 1 times [2018-07-24 11:02:50,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:50,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:50,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:50,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:50,074 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:50,417 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 4 [2018-07-24 11:02:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 111 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:50,652 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:50,652 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 11:02:50,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:50,661 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:50,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:02:51,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 110 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:02:51,908 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:02:51,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-07-24 11:02:51,909 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:02:51,909 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:02:51,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:02:51,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-07-24 11:02:51,910 INFO L87 Difference]: Start difference. First operand 60890 states and 75806 transitions. Second operand 5 states. [2018-07-24 11:02:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:55,522 INFO L93 Difference]: Finished difference Result 139940 states and 177011 transitions. [2018-07-24 11:02:55,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 11:02:55,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 279 [2018-07-24 11:02:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:55,741 INFO L225 Difference]: With dead ends: 139940 [2018-07-24 11:02:55,742 INFO L226 Difference]: Without dead ends: 83762 [2018-07-24 11:02:55,837 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-07-24 11:02:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83762 states. [2018-07-24 11:02:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83762 to 82346. [2018-07-24 11:02:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82346 states. [2018-07-24 11:02:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82346 states to 82346 states and 102112 transitions. [2018-07-24 11:02:58,253 INFO L78 Accepts]: Start accepts. Automaton has 82346 states and 102112 transitions. Word has length 279 [2018-07-24 11:02:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:58,253 INFO L471 AbstractCegarLoop]: Abstraction has 82346 states and 102112 transitions. [2018-07-24 11:02:58,254 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:02:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 82346 states and 102112 transitions. [2018-07-24 11:02:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-24 11:02:58,314 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:58,314 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:58,314 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1807294004, now seen corresponding path program 1 times [2018-07-24 11:02:58,315 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:58,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:58,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:58,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:58,316 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 121 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 11:02:59,208 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:59,208 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 11:02:59,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:59,216 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:59,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:02:59,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 129 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:03:00,153 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:00,153 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 11:03:00,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:00,169 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:00,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 84 proven. 11 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:03:01,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 129 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:03:01,590 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:03:01,591 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 8, 8] total 32 [2018-07-24 11:03:01,591 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:03:01,591 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 11:03:01,592 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 11:03:01,592 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2018-07-24 11:03:01,592 INFO L87 Difference]: Start difference. First operand 82346 states and 102112 transitions. Second operand 16 states. [2018-07-24 11:03:07,481 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-07-24 11:03:10,448 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-07-24 11:03:14,621 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2018-07-24 11:03:15,504 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2018-07-24 11:03:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:03:43,663 INFO L93 Difference]: Finished difference Result 340773 states and 465837 transitions. [2018-07-24 11:03:43,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2018-07-24 11:03:43,663 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 291 [2018-07-24 11:03:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:03:44,715 INFO L225 Difference]: With dead ends: 340773 [2018-07-24 11:03:44,715 INFO L226 Difference]: Without dead ends: 265086 [2018-07-24 11:03:44,907 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 1144 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24038 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=5642, Invalid=53164, Unknown=0, NotChecked=0, Total=58806 [2018-07-24 11:03:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265086 states. [2018-07-24 11:03:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265086 to 255411. [2018-07-24 11:03:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255411 states. [2018-07-24 11:03:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255411 states to 255411 states and 323105 transitions. [2018-07-24 11:03:53,404 INFO L78 Accepts]: Start accepts. Automaton has 255411 states and 323105 transitions. Word has length 291 [2018-07-24 11:03:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:03:53,404 INFO L471 AbstractCegarLoop]: Abstraction has 255411 states and 323105 transitions. [2018-07-24 11:03:53,404 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 11:03:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 255411 states and 323105 transitions. [2018-07-24 11:03:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-07-24 11:03:53,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:03:53,508 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:03:53,509 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:03:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1773281911, now seen corresponding path program 1 times [2018-07-24 11:03:53,509 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:03:53,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:53,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:53,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:03:53,510 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:03:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:54,082 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 11:03:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 167 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 11:03:54,230 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:54,230 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 11:03:54,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:54,243 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:54,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:03:54,636 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:54,919 WARN L169 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-07-24 11:03:54,982 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 11:03:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 167 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 11:03:55,272 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:03:55,272 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 11:03:55,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:03:55,289 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:03:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:03:55,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:03:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:03:56,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:03:56,715 WARN L169 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-07-24 11:03:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 148 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:03:57,103 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:03:57,104 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 21 [2018-07-24 11:03:57,104 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:03:57,105 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:03:57,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:03:57,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2018-07-24 11:03:57,105 INFO L87 Difference]: Start difference. First operand 255411 states and 323105 transitions. Second operand 9 states. [2018-07-24 11:03:58,248 WARN L169 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 11:04:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:04:24,446 INFO L93 Difference]: Finished difference Result 547071 states and 759843 transitions. [2018-07-24 11:04:24,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-24 11:04:24,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 314 [2018-07-24 11:04:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:04:25,982 INFO L225 Difference]: With dead ends: 547071 [2018-07-24 11:04:25,982 INFO L226 Difference]: Without dead ends: 292424 [2018-07-24 11:04:27,333 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1352 GetRequests, 1287 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=700, Invalid=3722, Unknown=0, NotChecked=0, Total=4422 [2018-07-24 11:04:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292424 states. [2018-07-24 11:04:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292424 to 265982. [2018-07-24 11:04:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265982 states. [2018-07-24 11:04:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265982 states to 265982 states and 316035 transitions. [2018-07-24 11:04:35,460 INFO L78 Accepts]: Start accepts. Automaton has 265982 states and 316035 transitions. Word has length 314 [2018-07-24 11:04:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:04:35,460 INFO L471 AbstractCegarLoop]: Abstraction has 265982 states and 316035 transitions. [2018-07-24 11:04:35,461 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:04:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 265982 states and 316035 transitions. [2018-07-24 11:04:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-07-24 11:04:35,562 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:04:35,562 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:04:35,563 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:04:35,563 INFO L82 PathProgramCache]: Analyzing trace with hash -904362047, now seen corresponding path program 1 times [2018-07-24 11:04:35,563 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:04:35,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:35,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:35,565 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:04:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 157 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:04:35,978 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:04:35,978 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 11:04:35,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:35,987 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:04:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:36,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:04:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:04:36,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:04:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 157 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:04:36,534 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:04:36,534 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 11:04:36,534 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:04:36,535 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:04:36,535 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:04:36,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:04:36,536 INFO L87 Difference]: Start difference. First operand 265982 states and 316035 transitions. Second operand 5 states. [2018-07-24 11:04:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:04:44,032 INFO L93 Difference]: Finished difference Result 486768 states and 581096 transitions. [2018-07-24 11:04:44,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:04:44,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2018-07-24 11:04:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:04:44,769 INFO L225 Difference]: With dead ends: 486768 [2018-07-24 11:04:44,769 INFO L226 Difference]: Without dead ends: 229967 [2018-07-24 11:04:45,140 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 647 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:04:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229967 states. [2018-07-24 11:04:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229967 to 226768. [2018-07-24 11:04:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226768 states. [2018-07-24 11:04:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226768 states to 226768 states and 270452 transitions. [2018-07-24 11:04:51,441 INFO L78 Accepts]: Start accepts. Automaton has 226768 states and 270452 transitions. Word has length 326 [2018-07-24 11:04:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:04:51,442 INFO L471 AbstractCegarLoop]: Abstraction has 226768 states and 270452 transitions. [2018-07-24 11:04:51,442 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:04:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 226768 states and 270452 transitions. [2018-07-24 11:04:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-07-24 11:04:51,528 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:04:51,529 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:04:51,529 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:04:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash -189461664, now seen corresponding path program 1 times [2018-07-24 11:04:51,529 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:04:51,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:51,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:51,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:04:51,530 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:04:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 191 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:04:52,079 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:04:52,079 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:04:52,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:52,089 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:04:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:52,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:04:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 259 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 11:04:52,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:04:53,002 WARN L169 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-07-24 11:04:53,068 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2018-07-24 11:04:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 191 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:04:53,352 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:04:53,353 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:04:53,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:04:53,369 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:04:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:04:54,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:04:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-07-24 11:04:55,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:04:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 185 proven. 101 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-07-24 11:04:55,617 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 11:04:55,617 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 8, 8, 5] total 26 [2018-07-24 11:04:55,617 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:04:55,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:04:55,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:04:55,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2018-07-24 11:04:55,619 INFO L87 Difference]: Start difference. First operand 226768 states and 270452 transitions. Second operand 5 states. [2018-07-24 11:05:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:05:06,330 INFO L93 Difference]: Finished difference Result 466072 states and 555682 transitions. [2018-07-24 11:05:06,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 11:05:06,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 357 [2018-07-24 11:05:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:05:07,046 INFO L225 Difference]: With dead ends: 466072 [2018-07-24 11:05:07,046 INFO L226 Difference]: Without dead ends: 243817 [2018-07-24 11:05:07,361 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1441 GetRequests, 1414 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2018-07-24 11:05:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243817 states. Received shutdown request... [2018-07-24 11:05:08,102 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 11:05:08,107 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 11:05:08,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 11:05:08 BoogieIcfgContainer [2018-07-24 11:05:08,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 11:05:08,111 INFO L168 Benchmark]: Toolchain (without parser) took 225266.23 ms. Allocated memory was 1.5 GB in the beginning and 5.4 GB in the end (delta: 3.9 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 4.3 GB. Max. memory is 7.1 GB. [2018-07-24 11:05:08,112 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 11:05:08,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1122.22 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 11:05:08,113 INFO L168 Benchmark]: Boogie Procedure Inliner took 163.17 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 11:05:08,114 INFO L168 Benchmark]: Boogie Preprocessor took 366.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 824.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -956.7 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2018-07-24 11:05:08,115 INFO L168 Benchmark]: RCFGBuilder took 5503.19 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 283.7 MB). Peak memory consumption was 283.7 MB. Max. memory is 7.1 GB. [2018-07-24 11:05:08,115 INFO L168 Benchmark]: TraceAbstraction took 218104.03 ms. Allocated memory was 2.4 GB in the beginning and 5.4 GB in the end (delta: 3.0 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -952.9 MB). Peak memory consumption was 4.1 GB. Max. memory is 7.1 GB. [2018-07-24 11:05:08,119 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1122.22 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 163.17 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 366.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 824.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -956.7 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5503.19 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 283.7 MB). Peak memory consumption was 283.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218104.03 ms. Allocated memory was 2.4 GB in the beginning and 5.4 GB in the end (delta: 3.0 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -952.9 MB). Peak memory consumption was 4.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1503]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1503). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 218.0s OverallTime, 16 OverallIterations, 4 TraceHistogramMax, 150.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2985 SDtfs, 26534 SDslu, 5029 SDs, 0 SdLazy, 50469 SolverSat, 9097 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10701 GetRequests, 10132 SyntacticMatches, 30 SemanticMatches, 539 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27099 ImplicationChecksByTransitivity, 27.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265982occurred 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: 35.5s AutomataMinimizationTime, 16 MinimizatonAttempts, 53203 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 20.3s InterpolantComputationTime, 8975 NumberOfCodeBlocks, 8975 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 13992 ConstructedInterpolants, 0 QuantifiedInterpolants, 13090515 SizeOfPredicates, 83 NumberOfNonLiveVariables, 21344 ConjunctsInSsa, 277 ConjunctsInUnsatCore, 54 InterpolantComputations, 11 PerfectInterpolantSequences, 6260/7371 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_label26_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_11-05-08-135.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label26_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_11-05-08-135.csv Completed graceful shutdown