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_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:51:24,414 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:51:24,416 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:51:24,429 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:51:24,429 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:51:24,430 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:51:24,432 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:51:24,434 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:51:24,437 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:51:24,444 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:51:24,445 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:51:24,448 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:51:24,449 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:51:24,450 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:51:24,454 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:51:24,455 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:51:24,456 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:51:24,458 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:51:24,460 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:51:24,461 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:51:24,462 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:51:24,463 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:51:24,465 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:51:24,466 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:51:24,466 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:51:24,467 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:51:24,468 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:51:24,468 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:51:24,469 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:51:24,470 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:51:24,470 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:51:24,471 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:51:24,471 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:51:24,471 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:51:24,472 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:51:24,473 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:51:24,473 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:51:24,496 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:51:24,497 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:51:24,498 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:51:24,498 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:51:24,498 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:51:24,499 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:51:24,499 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:51:24,499 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:51:24,499 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:51:24,499 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:51:24,500 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:51:24,500 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:51:24,500 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:51:24,501 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:51:24,501 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:51:24,501 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:51:24,502 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:51:24,502 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:51:24,502 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:51:24,503 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:51:24,503 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:51:24,503 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:51:24,503 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:51:24,504 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:51:24,504 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:51:24,504 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:51:24,504 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:51:24,504 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:51:24,505 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:51:24,505 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:51:24,505 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:51:24,505 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:51:24,505 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:51:24,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:51:24,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:51:24,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:51:24,592 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:51:24,592 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:51:24,593 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-07-24 12:51:24,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a6bb783d/ed6b505096fa403d8ff5c0833ea118d3/FLAGdf119686f [2018-07-24 12:51:25,377 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:51:25,377 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label21_true-unreach-call.c [2018-07-24 12:51:25,399 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a6bb783d/ed6b505096fa403d8ff5c0833ea118d3/FLAGdf119686f [2018-07-24 12:51:25,414 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a6bb783d/ed6b505096fa403d8ff5c0833ea118d3 [2018-07-24 12:51:25,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:51:25,427 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:51:25,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:51:25,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:51:25,438 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:51:25,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:51:25" (1/1) ... [2018-07-24 12:51:25,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc1b461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:25, skipping insertion in model container [2018-07-24 12:51:25,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:51:25" (1/1) ... [2018-07-24 12:51:25,679 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:51:26,197 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:51:26,215 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:51:26,460 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:51:26,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26 WrapperNode [2018-07-24 12:51:26,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:51:26,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:51:26,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:51:26,561 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:51:26,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:51:26,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:51:26,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:51:26,697 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:51:26,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:27,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:27,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:27,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:27,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:51:27,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:51:27,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:51:27,079 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:51:27,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:51:27,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:51:27,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:51:27,154 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:51:27,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:51:27,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:51:27,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:51:27,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:51:27,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:51:32,354 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:51:32,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:51:32 BoogieIcfgContainer [2018-07-24 12:51:32,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:51:32,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:51:32,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:51:32,360 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:51:32,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:51:25" (1/3) ... [2018-07-24 12:51:32,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b900805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:51:32, skipping insertion in model container [2018-07-24 12:51:32,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (2/3) ... [2018-07-24 12:51:32,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b900805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:51:32, skipping insertion in model container [2018-07-24 12:51:32,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:51:32" (3/3) ... [2018-07-24 12:51:32,364 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label21_true-unreach-call.c [2018-07-24 12:51:32,375 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:51:32,384 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:51:32,442 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:51:32,443 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:51:32,443 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:51:32,444 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:51:32,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:51:32,444 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:51:32,444 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:51:32,444 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:51:32,445 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:51:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:51:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-24 12:51:32,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:32,500 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:32,501 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 79824004, now seen corresponding path program 1 times [2018-07-24 12:51:32,510 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:32,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:32,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:32,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:32,570 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:33,544 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:33,544 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:33,544 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:33,551 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:33,563 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:33,564 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:33,566 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:51:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:35,827 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-07-24 12:51:35,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:35,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2018-07-24 12:51:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:35,853 INFO L225 Difference]: With dead ends: 838 [2018-07-24 12:51:35,853 INFO L226 Difference]: Without dead ends: 524 [2018-07-24 12:51:35,860 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-07-24 12:51:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-07-24 12:51:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-07-24 12:51:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-07-24 12:51:35,949 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 209 [2018-07-24 12:51:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:35,951 INFO L471 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-07-24 12:51:35,951 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-07-24 12:51:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-24 12:51:35,961 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:35,961 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:35,962 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:35,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2047446013, now seen corresponding path program 1 times [2018-07-24 12:51:35,963 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:35,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:35,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:35,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:35,965 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:36,309 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:36,309 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:51:36,309 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:36,312 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:51:36,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:51:36,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:51:36,313 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-07-24 12:51:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:40,140 INFO L93 Difference]: Finished difference Result 1271 states and 2186 transitions. [2018-07-24 12:51:40,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:51:40,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 219 [2018-07-24 12:51:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:40,148 INFO L225 Difference]: With dead ends: 1271 [2018-07-24 12:51:40,149 INFO L226 Difference]: Without dead ends: 755 [2018-07-24 12:51:40,151 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:51:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2018-07-24 12:51:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 739. [2018-07-24 12:51:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2018-07-24 12:51:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1100 transitions. [2018-07-24 12:51:40,200 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1100 transitions. Word has length 219 [2018-07-24 12:51:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:40,200 INFO L471 AbstractCegarLoop]: Abstraction has 739 states and 1100 transitions. [2018-07-24 12:51:40,200 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:51:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1100 transitions. [2018-07-24 12:51:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-24 12:51:40,205 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:40,205 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:40,205 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash 909218688, now seen corresponding path program 1 times [2018-07-24 12:51:40,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:40,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:40,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:40,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:40,208 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:40,503 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:40,503 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:40,503 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:40,504 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:40,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:40,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:40,505 INFO L87 Difference]: Start difference. First operand 739 states and 1100 transitions. Second operand 3 states. [2018-07-24 12:51:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:42,962 INFO L93 Difference]: Finished difference Result 2114 states and 3231 transitions. [2018-07-24 12:51:42,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:42,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2018-07-24 12:51:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:42,972 INFO L225 Difference]: With dead ends: 2114 [2018-07-24 12:51:42,973 INFO L226 Difference]: Without dead ends: 1381 [2018-07-24 12:51:42,976 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:42,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2018-07-24 12:51:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1376. [2018-07-24 12:51:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2018-07-24 12:51:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1980 transitions. [2018-07-24 12:51:43,025 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1980 transitions. Word has length 222 [2018-07-24 12:51:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:43,026 INFO L471 AbstractCegarLoop]: Abstraction has 1376 states and 1980 transitions. [2018-07-24 12:51:43,027 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1980 transitions. [2018-07-24 12:51:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-07-24 12:51:43,037 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:43,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:43,040 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:43,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1412879537, now seen corresponding path program 1 times [2018-07-24 12:51:43,040 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:43,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:43,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:43,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:43,041 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:43,397 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:43,398 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:43,398 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:43,398 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:43,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:43,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:43,399 INFO L87 Difference]: Start difference. First operand 1376 states and 1980 transitions. Second operand 3 states. [2018-07-24 12:51:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:45,201 INFO L93 Difference]: Finished difference Result 4026 states and 5967 transitions. [2018-07-24 12:51:45,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:45,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2018-07-24 12:51:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:45,218 INFO L225 Difference]: With dead ends: 4026 [2018-07-24 12:51:45,218 INFO L226 Difference]: Without dead ends: 2656 [2018-07-24 12:51:45,225 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2018-07-24 12:51:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2641. [2018-07-24 12:51:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2641 states. [2018-07-24 12:51:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 3776 transitions. [2018-07-24 12:51:45,323 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 3776 transitions. Word has length 242 [2018-07-24 12:51:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:45,324 INFO L471 AbstractCegarLoop]: Abstraction has 2641 states and 3776 transitions. [2018-07-24 12:51:45,324 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 3776 transitions. [2018-07-24 12:51:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-07-24 12:51:45,341 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:45,342 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:45,342 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash 779273818, now seen corresponding path program 1 times [2018-07-24 12:51:45,342 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:45,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:45,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:45,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:45,344 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:45,908 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:45,909 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 12:51:45,909 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:45,909 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:51:45,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:51:45,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:51:45,910 INFO L87 Difference]: Start difference. First operand 2641 states and 3776 transitions. Second operand 7 states. [2018-07-24 12:51:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:50,560 INFO L93 Difference]: Finished difference Result 11521 states and 18986 transitions. [2018-07-24 12:51:50,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 12:51:50,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 287 [2018-07-24 12:51:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:50,647 INFO L225 Difference]: With dead ends: 11521 [2018-07-24 12:51:50,647 INFO L226 Difference]: Without dead ends: 8886 [2018-07-24 12:51:50,675 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:51:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8886 states. [2018-07-24 12:51:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8886 to 8362. [2018-07-24 12:51:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8362 states. [2018-07-24 12:51:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 12395 transitions. [2018-07-24 12:51:50,995 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 12395 transitions. Word has length 287 [2018-07-24 12:51:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:50,995 INFO L471 AbstractCegarLoop]: Abstraction has 8362 states and 12395 transitions. [2018-07-24 12:51:50,995 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:51:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 12395 transitions. [2018-07-24 12:51:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-07-24 12:51:51,054 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:51,055 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:51:51,055 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:51,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1164292358, now seen corresponding path program 1 times [2018-07-24 12:51:51,056 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:51,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:51,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:51,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:51,057 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:51,486 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:51,486 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:51:51,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:51,495 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:51,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:52,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:52,484 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:52,484 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:51:52,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:52,510 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:53,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:53,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:53,818 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:53,818 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:51:53,818 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:53,820 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:51:53,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:51:53,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:51:53,820 INFO L87 Difference]: Start difference. First operand 8362 states and 12395 transitions. Second operand 9 states. [2018-07-24 12:51:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:57,724 INFO L93 Difference]: Finished difference Result 23671 states and 36363 transitions. [2018-07-24 12:51:57,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:51:57,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 302 [2018-07-24 12:51:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:57,837 INFO L225 Difference]: With dead ends: 23671 [2018-07-24 12:51:57,838 INFO L226 Difference]: Without dead ends: 15315 [2018-07-24 12:51:57,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1201 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:51:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15315 states. [2018-07-24 12:51:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15315 to 15017. [2018-07-24 12:51:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15017 states. [2018-07-24 12:51:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15017 states to 15017 states and 21185 transitions. [2018-07-24 12:51:58,395 INFO L78 Accepts]: Start accepts. Automaton has 15017 states and 21185 transitions. Word has length 302 [2018-07-24 12:51:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:58,395 INFO L471 AbstractCegarLoop]: Abstraction has 15017 states and 21185 transitions. [2018-07-24 12:51:58,396 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:51:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 15017 states and 21185 transitions. [2018-07-24 12:51:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-07-24 12:51:58,472 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:58,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:58,473 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash -792393365, now seen corresponding path program 1 times [2018-07-24 12:51:58,479 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:58,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:58,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:58,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:58,481 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:59,139 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:51:59,345 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:51:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:59,644 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:59,644 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:51:59,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:59,660 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:59,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:52:00,211 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:52:00,610 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:52:00,610 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 12:52:00,610 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:00,611 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:52:00,611 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:52:00,611 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:52:00,612 INFO L87 Difference]: Start difference. First operand 15017 states and 21185 transitions. Second operand 3 states. [2018-07-24 12:52:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:02,964 INFO L93 Difference]: Finished difference Result 42730 states and 60791 transitions. [2018-07-24 12:52:02,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:52:02,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 309 [2018-07-24 12:52:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:03,275 INFO L225 Difference]: With dead ends: 42730 [2018-07-24 12:52:03,275 INFO L226 Difference]: Without dead ends: 27719 [2018-07-24 12:52:03,306 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 616 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:52:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27719 states. [2018-07-24 12:52:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27719 to 27470. [2018-07-24 12:52:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27470 states. [2018-07-24 12:52:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27470 states to 27470 states and 37384 transitions. [2018-07-24 12:52:03,915 INFO L78 Accepts]: Start accepts. Automaton has 27470 states and 37384 transitions. Word has length 309 [2018-07-24 12:52:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:03,916 INFO L471 AbstractCegarLoop]: Abstraction has 27470 states and 37384 transitions. [2018-07-24 12:52:03,916 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:52:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 27470 states and 37384 transitions. [2018-07-24 12:52:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-07-24 12:52:03,992 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:03,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:03,993 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1548274009, now seen corresponding path program 1 times [2018-07-24 12:52:03,993 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:03,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:03,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:03,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:03,995 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:04,562 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:04,562 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:04,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:04,577 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:04,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:05,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:05,242 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 12:52:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:05,898 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:05,899 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:05,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:05,931 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:06,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:06,945 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-07-24 12:52:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:07,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:07,598 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:07,598 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-07-24 12:52:07,598 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:07,599 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:52:07,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:52:07,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:52:07,600 INFO L87 Difference]: Start difference. First operand 27470 states and 37384 transitions. Second operand 6 states. [2018-07-24 12:52:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:11,511 INFO L93 Difference]: Finished difference Result 62952 states and 89631 transitions. [2018-07-24 12:52:11,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:52:11,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 321 [2018-07-24 12:52:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:11,659 INFO L225 Difference]: With dead ends: 62952 [2018-07-24 12:52:11,660 INFO L226 Difference]: Without dead ends: 35493 [2018-07-24 12:52:11,727 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1278 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:52:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35493 states. [2018-07-24 12:52:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35493 to 34535. [2018-07-24 12:52:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34535 states. [2018-07-24 12:52:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34535 states to 34535 states and 44614 transitions. [2018-07-24 12:52:12,475 INFO L78 Accepts]: Start accepts. Automaton has 34535 states and 44614 transitions. Word has length 321 [2018-07-24 12:52:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:12,475 INFO L471 AbstractCegarLoop]: Abstraction has 34535 states and 44614 transitions. [2018-07-24 12:52:12,475 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:52:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34535 states and 44614 transitions. [2018-07-24 12:52:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-07-24 12:52:12,544 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:12,545 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:52:12,545 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:12,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1908447066, now seen corresponding path program 1 times [2018-07-24 12:52:12,545 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:12,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:12,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:12,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:12,547 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:12,907 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:52:12,907 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:52:12,907 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:12,908 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:52:12,908 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:52:12,908 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:52:12,908 INFO L87 Difference]: Start difference. First operand 34535 states and 44614 transitions. Second operand 3 states. [2018-07-24 12:52:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:16,830 INFO L93 Difference]: Finished difference Result 60330 states and 77893 transitions. [2018-07-24 12:52:16,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:52:16,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2018-07-24 12:52:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:16,920 INFO L225 Difference]: With dead ends: 60330 [2018-07-24 12:52:16,920 INFO L226 Difference]: Without dead ends: 30868 [2018-07-24 12:52:16,964 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:52:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30868 states. [2018-07-24 12:52:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30868 to 30435. [2018-07-24 12:52:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30435 states. [2018-07-24 12:52:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30435 states to 30435 states and 37828 transitions. [2018-07-24 12:52:17,559 INFO L78 Accepts]: Start accepts. Automaton has 30435 states and 37828 transitions. Word has length 340 [2018-07-24 12:52:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:17,560 INFO L471 AbstractCegarLoop]: Abstraction has 30435 states and 37828 transitions. [2018-07-24 12:52:17,560 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:52:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 30435 states and 37828 transitions. [2018-07-24 12:52:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-07-24 12:52:17,619 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:17,619 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:17,620 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:17,620 INFO L82 PathProgramCache]: Analyzing trace with hash 691921356, now seen corresponding path program 1 times [2018-07-24 12:52:17,620 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:17,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:17,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:17,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:17,622 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:18,237 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:52:18,447 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:52:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:52:18,758 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:18,758 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:18,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:18,766 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:19,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:52:19,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:52:19,436 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:19,436 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:19,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:19,459 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:20,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 159 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:20,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 137 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:52:21,114 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:21,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 10, 8] total 26 [2018-07-24 12:52:21,115 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:21,116 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:52:21,117 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:52:21,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2018-07-24 12:52:21,117 INFO L87 Difference]: Start difference. First operand 30435 states and 37828 transitions. Second operand 11 states. [2018-07-24 12:52:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:24,899 INFO L93 Difference]: Finished difference Result 60735 states and 78341 transitions. [2018-07-24 12:52:24,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:52:24,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 344 [2018-07-24 12:52:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:24,987 INFO L225 Difference]: With dead ends: 60735 [2018-07-24 12:52:24,987 INFO L226 Difference]: Without dead ends: 30692 [2018-07-24 12:52:25,046 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 1364 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 12:52:25,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30692 states. [2018-07-24 12:52:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30692 to 30041. [2018-07-24 12:52:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30041 states. [2018-07-24 12:52:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30041 states to 30041 states and 36031 transitions. [2018-07-24 12:52:25,660 INFO L78 Accepts]: Start accepts. Automaton has 30041 states and 36031 transitions. Word has length 344 [2018-07-24 12:52:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:25,661 INFO L471 AbstractCegarLoop]: Abstraction has 30041 states and 36031 transitions. [2018-07-24 12:52:25,661 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:52:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30041 states and 36031 transitions. [2018-07-24 12:52:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-24 12:52:25,712 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:25,712 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:25,712 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1043224730, now seen corresponding path program 1 times [2018-07-24 12:52:25,713 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:25,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:25,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:25,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:25,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 178 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:52:26,099 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:26,099 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:26,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:26,107 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:26,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-07-24 12:52:26,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 142 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 12:52:27,254 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:52:27,255 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-07-24 12:52:27,255 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:27,256 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:52:27,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:52:27,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:52:27,256 INFO L87 Difference]: Start difference. First operand 30041 states and 36031 transitions. Second operand 5 states. [2018-07-24 12:52:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:29,817 INFO L93 Difference]: Finished difference Result 66720 states and 80305 transitions. [2018-07-24 12:52:29,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:52:29,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2018-07-24 12:52:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:29,903 INFO L225 Difference]: With dead ends: 66720 [2018-07-24 12:52:29,903 INFO L226 Difference]: Without dead ends: 44737 [2018-07-24 12:52:29,939 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:52:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44737 states. [2018-07-24 12:52:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44737 to 44260. [2018-07-24 12:52:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44260 states. [2018-07-24 12:52:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44260 states to 44260 states and 52749 transitions. [2018-07-24 12:52:30,721 INFO L78 Accepts]: Start accepts. Automaton has 44260 states and 52749 transitions. Word has length 360 [2018-07-24 12:52:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:30,721 INFO L471 AbstractCegarLoop]: Abstraction has 44260 states and 52749 transitions. [2018-07-24 12:52:30,721 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:52:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 44260 states and 52749 transitions. [2018-07-24 12:52:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-07-24 12:52:30,772 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:30,772 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:30,772 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1191226775, now seen corresponding path program 1 times [2018-07-24 12:52:30,773 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:30,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:30,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:30,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:30,774 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 188 proven. 94 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:52:31,355 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:31,355 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 12:52:31,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:31,363 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:31,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-07-24 12:52:31,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:32,116 WARN L169 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-07-24 12:52:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 166 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 12:52:32,833 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:32,833 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:32,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:32,850 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:33,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-07-24 12:52:33,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 166 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 12:52:34,668 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:34,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 6, 8] total 30 [2018-07-24 12:52:34,668 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:34,669 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 12:52:34,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 12:52:34,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2018-07-24 12:52:34,674 INFO L87 Difference]: Start difference. First operand 44260 states and 52749 transitions. Second operand 16 states. [2018-07-24 12:52:46,449 WARN L169 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-07-24 12:52:47,102 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:52:48,413 WARN L169 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-07-24 12:52:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:52,637 INFO L93 Difference]: Finished difference Result 139062 states and 179557 transitions. [2018-07-24 12:52:52,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-24 12:52:52,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 372 [2018-07-24 12:52:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:52,968 INFO L225 Difference]: With dead ends: 139062 [2018-07-24 12:52:52,969 INFO L226 Difference]: Without dead ends: 99090 [2018-07-24 12:52:53,074 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1595 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9234 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3547, Invalid=20945, Unknown=0, NotChecked=0, Total=24492 [2018-07-24 12:52:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99090 states. [2018-07-24 12:52:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99090 to 95193. [2018-07-24 12:52:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95193 states. [2018-07-24 12:52:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95193 states to 95193 states and 112168 transitions. [2018-07-24 12:52:55,780 INFO L78 Accepts]: Start accepts. Automaton has 95193 states and 112168 transitions. Word has length 372 [2018-07-24 12:52:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:55,781 INFO L471 AbstractCegarLoop]: Abstraction has 95193 states and 112168 transitions. [2018-07-24 12:52:55,781 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 12:52:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 95193 states and 112168 transitions. [2018-07-24 12:52:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-07-24 12:52:55,860 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:55,861 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:55,861 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash -497271089, now seen corresponding path program 1 times [2018-07-24 12:52:55,861 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:55,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:55,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:55,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:55,863 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:56,158 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-07-24 12:52:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:56,950 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:56,950 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:56,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:56,959 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:57,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-07-24 12:52:57,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 185 proven. 102 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-07-24 12:52:57,654 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:52:57,655 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-07-24 12:52:57,655 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:57,656 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:52:57,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:52:57,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:52:57,656 INFO L87 Difference]: Start difference. First operand 95193 states and 112168 transitions. Second operand 5 states. [2018-07-24 12:53:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:00,242 INFO L93 Difference]: Finished difference Result 174416 states and 206934 transitions. [2018-07-24 12:53:00,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:53:00,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 403 [2018-07-24 12:53:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:00,396 INFO L225 Difference]: With dead ends: 174416 [2018-07-24 12:53:00,396 INFO L226 Difference]: Without dead ends: 82103 [2018-07-24 12:53:00,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 801 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:53:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82103 states. [2018-07-24 12:53:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82103 to 80593. [2018-07-24 12:53:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80593 states. [2018-07-24 12:53:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80593 states to 80593 states and 92271 transitions. [2018-07-24 12:53:02,779 INFO L78 Accepts]: Start accepts. Automaton has 80593 states and 92271 transitions. Word has length 403 [2018-07-24 12:53:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:02,779 INFO L471 AbstractCegarLoop]: Abstraction has 80593 states and 92271 transitions. [2018-07-24 12:53:02,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:53:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 80593 states and 92271 transitions. [2018-07-24 12:53:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-07-24 12:53:02,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:02,867 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:02,867 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:53:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1296594471, now seen corresponding path program 1 times [2018-07-24 12:53:02,868 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:02,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:02,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:02,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:02,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:03,621 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:53:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 259 proven. 58 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-07-24 12:53:03,882 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:03,882 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:53:03,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:03,890 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:04,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-07-24 12:53:04,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 205 proven. 169 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:53:04,972 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:04,972 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:53:04,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:04,988 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:05,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-07-24 12:53:06,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 197 proven. 117 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-07-24 12:53:07,417 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:53:07,418 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 6, 5] total 18 [2018-07-24 12:53:07,418 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:53:07,419 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:53:07,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:53:07,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:53:07,420 INFO L87 Difference]: Start difference. First operand 80593 states and 92271 transitions. Second operand 5 states. [2018-07-24 12:53:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:09,830 INFO L93 Difference]: Finished difference Result 157128 states and 179814 transitions. [2018-07-24 12:53:09,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:53:09,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2018-07-24 12:53:09,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:10,009 INFO L225 Difference]: With dead ends: 157128 [2018-07-24 12:53:10,009 INFO L226 Difference]: Without dead ends: 82215 [2018-07-24 12:53:10,096 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1665 GetRequests, 1645 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:53:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82215 states. [2018-07-24 12:53:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82215 to 82165. [2018-07-24 12:53:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82165 states. [2018-07-24 12:53:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82165 states to 82165 states and 93911 transitions. [2018-07-24 12:53:11,521 INFO L78 Accepts]: Start accepts. Automaton has 82165 states and 93911 transitions. Word has length 415 [2018-07-24 12:53:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:11,522 INFO L471 AbstractCegarLoop]: Abstraction has 82165 states and 93911 transitions. [2018-07-24 12:53:11,522 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:53:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand 82165 states and 93911 transitions. [2018-07-24 12:53:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-07-24 12:53:11,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:11,614 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:53:11,614 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:53:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -401037000, now seen corresponding path program 1 times [2018-07-24 12:53:11,614 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:11,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:11,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:11,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:11,616 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 246 proven. 123 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 12:53:12,838 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:12,838 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:53:12,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:12,849 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:13,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-07-24 12:53:13,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 246 proven. 123 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 12:53:14,083 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:14,083 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:53:14,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:14,102 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:14,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-07-24 12:53:15,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:15,719 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:53:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 231 proven. 168 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-07-24 12:53:16,020 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:53:16,020 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 21 [2018-07-24 12:53:16,020 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:53:16,021 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:53:16,021 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:53:16,022 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2018-07-24 12:53:16,022 INFO L87 Difference]: Start difference. First operand 82165 states and 93911 transitions. Second operand 7 states. [2018-07-24 12:53:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:21,108 INFO L93 Difference]: Finished difference Result 163920 states and 193126 transitions. [2018-07-24 12:53:21,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 12:53:21,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 437 [2018-07-24 12:53:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:21,423 INFO L225 Difference]: With dead ends: 163920 [2018-07-24 12:53:21,423 INFO L226 Difference]: Without dead ends: 89005 [2018-07-24 12:53:21,537 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1764 GetRequests, 1738 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:53:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89005 states. [2018-07-24 12:53:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89005 to 83929. [2018-07-24 12:53:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83929 states. [2018-07-24 12:53:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83929 states to 83929 states and 95738 transitions. [2018-07-24 12:53:23,631 INFO L78 Accepts]: Start accepts. Automaton has 83929 states and 95738 transitions. Word has length 437 [2018-07-24 12:53:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:23,631 INFO L471 AbstractCegarLoop]: Abstraction has 83929 states and 95738 transitions. [2018-07-24 12:53:23,632 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:53:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 83929 states and 95738 transitions. [2018-07-24 12:53:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-07-24 12:53:23,734 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:23,734 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:23,734 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:53:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1933412258, now seen corresponding path program 1 times [2018-07-24 12:53:23,735 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:23,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:23,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:23,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:23,736 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 248 proven. 44 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-07-24 12:53:24,042 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:24,042 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:53:24,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:24,050 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:24,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 336 proven. 6 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-07-24 12:53:24,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 336 proven. 6 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-07-24 12:53:25,320 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:25,320 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:53:25,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:25,340 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:26,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 271 proven. 85 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-07-24 12:53:26,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 336 proven. 6 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-07-24 12:53:27,023 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:53:27,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 12 [2018-07-24 12:53:27,024 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:53:27,025 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:53:27,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:53:27,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:53:27,025 INFO L87 Difference]: Start difference. First operand 83929 states and 95738 transitions. Second operand 9 states. [2018-07-24 12:53:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:41,428 INFO L93 Difference]: Finished difference Result 324101 states and 391996 transitions. [2018-07-24 12:53:41,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 12:53:41,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 442 [2018-07-24 12:53:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:42,321 INFO L225 Difference]: With dead ends: 324101 [2018-07-24 12:53:42,321 INFO L226 Difference]: Without dead ends: 245203 [2018-07-24 12:53:42,528 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1792 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2018-07-24 12:53:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245203 states. [2018-07-24 12:53:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245203 to 233722. [2018-07-24 12:53:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233722 states. [2018-07-24 12:53:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233722 states to 233722 states and 265130 transitions. [2018-07-24 12:53:52,203 INFO L78 Accepts]: Start accepts. Automaton has 233722 states and 265130 transitions. Word has length 442 [2018-07-24 12:53:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:52,204 INFO L471 AbstractCegarLoop]: Abstraction has 233722 states and 265130 transitions. [2018-07-24 12:53:52,204 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:53:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 233722 states and 265130 transitions. [2018-07-24 12:53:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-07-24 12:53:52,439 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:52,439 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:52,440 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:53:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash 335770293, now seen corresponding path program 1 times [2018-07-24 12:53:52,440 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:52,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:52,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:52,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:52,441 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 254 proven. 126 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-07-24 12:53:52,906 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:52,907 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 12:53:52,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:52,914 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:53,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-07-24 12:53:53,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-07-24 12:53:54,428 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:54,428 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 12:53:54,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:54,444 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:55,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-07-24 12:53:55,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 239 proven. 186 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-07-24 12:53:55,773 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:53:55,774 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 16 [2018-07-24 12:53:55,774 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:53:55,775 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 12:53:55,775 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 12:53:55,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:53:55,776 INFO L87 Difference]: Start difference. First operand 233722 states and 265130 transitions. Second operand 12 states. [2018-07-24 12:53:57,813 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-07-24 12:53:58,226 WARN L169 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-07-24 12:54:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:24,280 INFO L93 Difference]: Finished difference Result 699200 states and 855621 transitions. [2018-07-24 12:54:24,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-24 12:54:24,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 443 [2018-07-24 12:54:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:26,456 INFO L225 Difference]: With dead ends: 699200 [2018-07-24 12:54:26,456 INFO L226 Difference]: Without dead ends: 393921 [2018-07-24 12:54:26,971 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1929 GetRequests, 1837 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1374, Invalid=7368, Unknown=0, NotChecked=0, Total=8742 [2018-07-24 12:54:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393921 states. [2018-07-24 12:54:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393921 to 345108. [2018-07-24 12:54:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345108 states. [2018-07-24 12:54:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345108 states to 345108 states and 374397 transitions. [2018-07-24 12:54:34,645 INFO L78 Accepts]: Start accepts. Automaton has 345108 states and 374397 transitions. Word has length 443 [2018-07-24 12:54:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:34,645 INFO L471 AbstractCegarLoop]: Abstraction has 345108 states and 374397 transitions. [2018-07-24 12:54:34,645 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 12:54:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 345108 states and 374397 transitions. [2018-07-24 12:54:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-07-24 12:54:34,824 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:34,824 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:54:34,825 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1571861991, now seen corresponding path program 1 times [2018-07-24 12:54:34,825 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:34,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:34,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:34,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:34,826 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-07-24 12:54:35,391 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:35,391 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:54:35,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:35,400 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:35,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 582 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-07-24 12:54:36,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 465 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-07-24 12:54:37,375 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:37,375 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 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:54:37,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:37,391 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:38,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 582 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-07-24 12:54:38,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 465 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-07-24 12:54:38,772 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:54:38,773 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:54:38,773 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:54:38,774 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:54:38,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:54:38,774 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:54:38,775 INFO L87 Difference]: Start difference. First operand 345108 states and 374397 transitions. Second operand 9 states. Received shutdown request... [2018-07-24 12:55:01,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-24 12:55:01,710 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:55:01,718 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:55:01,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:55:01 BoogieIcfgContainer [2018-07-24 12:55:01,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:55:01,719 INFO L168 Benchmark]: Toolchain (without parser) took 216292.73 ms. Allocated memory was 1.5 GB in the beginning and 5.7 GB in the end (delta: 4.1 GB). Free memory was 1.4 GB in the beginning and 4.5 GB in the end (delta: -3.0 GB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. [2018-07-24 12:55:01,720 INFO L168 Benchmark]: CDTParser took 0.23 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 12:55:01,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1131.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:01,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 135.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:01,723 INFO L168 Benchmark]: Boogie Preprocessor took 381.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -929.1 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:01,723 INFO L168 Benchmark]: RCFGBuilder took 5276.75 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 289.8 MB). Peak memory consumption was 289.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:01,724 INFO L168 Benchmark]: TraceAbstraction took 209362.22 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.3 GB). Free memory was 1.9 GB in the beginning and 4.5 GB in the end (delta: -2.5 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. [2018-07-24 12:55:01,730 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1131.33 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 135.41 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 381.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -929.1 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5276.75 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 289.8 MB). Peak memory consumption was 289.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209362.22 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.3 GB). Free memory was 1.9 GB in the beginning and 4.5 GB in the end (delta: -2.5 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1641]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1641). Cancelled while BasicCegarLoop was constructing difference of abstraction (345108states) and interpolant automaton (currently 36 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (983587 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 209.2s OverallTime, 18 OverallIterations, 6 TraceHistogramMax, 135.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5422 SDtfs, 35839 SDslu, 9726 SDs, 0 SdLazy, 48028 SolverSat, 9557 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17151 GetRequests, 16642 SyntacticMatches, 26 SemanticMatches, 483 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14013 ImplicationChecksByTransitivity, 19.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=345108occurred in iteration=17, 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: 30.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 74455 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 10.0s SatisfiabilityAnalysisTime, 26.8s InterpolantComputationTime, 14415 NumberOfCodeBlocks, 14415 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 22595 ConstructedInterpolants, 0 QuantifiedInterpolants, 23328619 SizeOfPredicates, 146 NumberOfNonLiveVariables, 30201 ConjunctsInSsa, 348 ConjunctsInUnsatCore, 60 InterpolantComputations, 11 PerfectInterpolantSequences, 16839/19327 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_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-55-01-744.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-55-01-744.csv Completed graceful shutdown