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_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:47:56,614 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:47:56,616 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:47:56,632 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:47:56,632 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:47:56,634 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:47:56,636 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:47:56,638 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:47:56,640 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:47:56,641 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:47:56,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:47:56,645 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:47:56,646 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:47:56,648 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:47:56,649 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:47:56,650 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:47:56,651 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:47:56,661 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:47:56,663 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:47:56,667 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:47:56,669 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:47:56,670 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:47:56,673 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:47:56,673 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:47:56,673 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:47:56,674 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:47:56,675 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:47:56,676 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:47:56,677 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:47:56,678 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:47:56,679 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:47:56,680 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:47:56,680 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:47:56,681 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:47:56,683 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:47:56,684 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:47:56,684 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 12:47:56,712 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:47:56,712 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:47:56,715 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:47:56,715 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:47:56,715 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:47:56,717 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:47:56,718 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:47:56,718 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:47:56,718 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:47:56,718 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:47:56,718 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:47:56,719 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:47:56,720 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:47:56,720 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:47:56,720 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:47:56,720 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:47:56,721 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:47:56,721 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:47:56,721 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:47:56,722 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:47:56,722 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:47:56,722 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:47:56,722 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:47:56,722 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:47:56,723 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:47:56,723 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:47:56,723 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:47:56,723 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:47:56,724 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:47:56,724 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:47:56,724 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:47:56,724 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:47:56,724 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:47:56,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:47:56,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:47:56,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:47:56,810 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:47:56,811 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:47:56,812 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label05_true-unreach-call.c [2018-07-24 12:47:57,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065e5f686/5d219874b4324c3586435721253a3703/FLAG268a75285 [2018-07-24 12:47:57,535 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:47:57,537 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label05_true-unreach-call.c [2018-07-24 12:47:57,569 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065e5f686/5d219874b4324c3586435721253a3703/FLAG268a75285 [2018-07-24 12:47:57,593 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065e5f686/5d219874b4324c3586435721253a3703 [2018-07-24 12:47:57,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:47:57,606 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:47:57,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:47:57,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:47:57,616 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:47:57,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:47:57" (1/1) ... [2018-07-24 12:47:57,620 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 12:47:57, skipping insertion in model container [2018-07-24 12:47:57,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:47:57" (1/1) ... [2018-07-24 12:47:57,907 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:47:58,403 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:47:58,424 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:47:59,013 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:47:59,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59 WrapperNode [2018-07-24 12:47:59,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:47:59,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:47:59,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:47:59,093 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:47:59,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:47:59,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:47:59,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:47:59,269 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:47:59,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (1/1) ... [2018-07-24 12:47:59,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:47:59,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:47:59,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:47:59,670 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:47:59,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (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 12:47:59,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:47:59,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:47:59,744 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 12:47:59,744 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 12:47:59,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:47:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:47:59,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:47:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:48:04,970 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:48:04,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:48:04 BoogieIcfgContainer [2018-07-24 12:48:04,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:48:04,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:48:04,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:48:04,974 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:48:04,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:47:57" (1/3) ... [2018-07-24 12:48:04,975 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 12:48:04, skipping insertion in model container [2018-07-24 12:48:04,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:59" (2/3) ... [2018-07-24 12:48:04,976 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 12:48:04, skipping insertion in model container [2018-07-24 12:48:04,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:48:04" (3/3) ... [2018-07-24 12:48:04,978 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label05_true-unreach-call.c [2018-07-24 12:48:04,986 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:48:04,994 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:48:05,045 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:48:05,046 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:48:05,046 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:48:05,046 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:48:05,047 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:48:05,047 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:48:05,047 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:48:05,047 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:48:05,047 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:48:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:48:05,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-24 12:48:05,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:05,097 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] [2018-07-24 12:48:05,098 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 12:48:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash -49135596, now seen corresponding path program 1 times [2018-07-24 12:48:05,106 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:05,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:05,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:05,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:05,155 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:06,044 WARN L169 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:48:06,288 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 12:48:06,291 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:06,291 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:48:06,291 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:06,297 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:06,313 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:06,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:06,316 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:48:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:08,732 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-07-24 12:48:08,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:08,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2018-07-24 12:48:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:08,763 INFO L225 Difference]: With dead ends: 845 [2018-07-24 12:48:08,763 INFO L226 Difference]: Without dead ends: 531 [2018-07-24 12:48:08,772 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-07-24 12:48:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-07-24 12:48:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-07-24 12:48:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-07-24 12:48:08,874 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 165 [2018-07-24 12:48:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:08,876 INFO L471 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-07-24 12:48:08,876 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-07-24 12:48:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-24 12:48:08,888 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:08,888 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] [2018-07-24 12:48:08,889 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 12:48:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1507813107, now seen corresponding path program 1 times [2018-07-24 12:48:08,889 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:08,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:08,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:08,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:08,891 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:09,215 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:48:09,419 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 12:48:09,420 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:09,420 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:48:09,420 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:09,422 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:48:09,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:48:09,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:48:09,423 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-07-24 12:48:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:13,143 INFO L93 Difference]: Finished difference Result 1501 states and 2543 transitions. [2018-07-24 12:48:13,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:48:13,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2018-07-24 12:48:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:13,154 INFO L225 Difference]: With dead ends: 1501 [2018-07-24 12:48:13,154 INFO L226 Difference]: Without dead ends: 977 [2018-07-24 12:48:13,157 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:48:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2018-07-24 12:48:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2018-07-24 12:48:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2018-07-24 12:48:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1498 transitions. [2018-07-24 12:48:13,211 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1498 transitions. Word has length 175 [2018-07-24 12:48:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:13,211 INFO L471 AbstractCegarLoop]: Abstraction has 957 states and 1498 transitions. [2018-07-24 12:48:13,212 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:48:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1498 transitions. [2018-07-24 12:48:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-24 12:48:13,218 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:13,219 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] [2018-07-24 12:48:13,219 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 12:48:13,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2079958768, now seen corresponding path program 1 times [2018-07-24 12:48:13,219 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:13,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:13,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:13,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:13,221 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:13,516 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 12:48:13,517 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:13,517 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:48:13,517 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:13,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:13,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:13,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:13,521 INFO L87 Difference]: Start difference. First operand 957 states and 1498 transitions. Second operand 3 states. [2018-07-24 12:48:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:16,008 INFO L93 Difference]: Finished difference Result 2764 states and 4461 transitions. [2018-07-24 12:48:16,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:16,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2018-07-24 12:48:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:16,031 INFO L225 Difference]: With dead ends: 2764 [2018-07-24 12:48:16,031 INFO L226 Difference]: Without dead ends: 1813 [2018-07-24 12:48:16,036 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 12:48:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2018-07-24 12:48:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1806. [2018-07-24 12:48:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1806 states. [2018-07-24 12:48:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2737 transitions. [2018-07-24 12:48:16,114 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2737 transitions. Word has length 178 [2018-07-24 12:48:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:16,115 INFO L471 AbstractCegarLoop]: Abstraction has 1806 states and 2737 transitions. [2018-07-24 12:48:16,115 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2737 transitions. [2018-07-24 12:48:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-24 12:48:16,123 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:16,124 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:16,124 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 12:48:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1707506134, now seen corresponding path program 1 times [2018-07-24 12:48:16,124 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:16,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:16,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:16,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:16,126 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:16,387 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:16,388 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:48:16,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:16,397 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:16,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:16,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:17,258 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:17,258 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-07-24 12:48:17,258 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:17,259 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:17,260 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:17,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:48:17,261 INFO L87 Difference]: Start difference. First operand 1806 states and 2737 transitions. Second operand 3 states. [2018-07-24 12:48:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:19,537 INFO L93 Difference]: Finished difference Result 3609 states and 5494 transitions. [2018-07-24 12:48:19,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:19,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-07-24 12:48:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:19,553 INFO L225 Difference]: With dead ends: 3609 [2018-07-24 12:48:19,553 INFO L226 Difference]: Without dead ends: 1809 [2018-07-24 12:48:19,560 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:48:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2018-07-24 12:48:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1806. [2018-07-24 12:48:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1806 states. [2018-07-24 12:48:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2521 transitions. [2018-07-24 12:48:19,608 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2521 transitions. Word has length 203 [2018-07-24 12:48:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:19,608 INFO L471 AbstractCegarLoop]: Abstraction has 1806 states and 2521 transitions. [2018-07-24 12:48:19,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2521 transitions. [2018-07-24 12:48:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-24 12:48:19,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:19,616 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:19,616 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 12:48:19,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1551382215, now seen corresponding path program 1 times [2018-07-24 12:48:19,617 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:19,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:19,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:19,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:19,618 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 71 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 12:48:19,967 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:19,967 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:19,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:19,978 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:20,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:20,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:20,593 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:48:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:21,075 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:21,075 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:48:21,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:21,091 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:21,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:21,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:22,099 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:48:22,099 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 12:48:22,099 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:48:22,101 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:48:22,101 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:48:22,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:48:22,102 INFO L87 Difference]: Start difference. First operand 1806 states and 2521 transitions. Second operand 9 states. [2018-07-24 12:48:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:26,442 INFO L93 Difference]: Finished difference Result 5790 states and 9172 transitions. [2018-07-24 12:48:26,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:48:26,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 231 [2018-07-24 12:48:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:26,480 INFO L225 Difference]: With dead ends: 5790 [2018-07-24 12:48:26,480 INFO L226 Difference]: Without dead ends: 3990 [2018-07-24 12:48:26,491 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 919 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:48:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2018-07-24 12:48:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 3806. [2018-07-24 12:48:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3806 states. [2018-07-24 12:48:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 5301 transitions. [2018-07-24 12:48:26,670 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 5301 transitions. Word has length 231 [2018-07-24 12:48:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:26,670 INFO L471 AbstractCegarLoop]: Abstraction has 3806 states and 5301 transitions. [2018-07-24 12:48:26,670 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:48:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 5301 transitions. [2018-07-24 12:48:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-24 12:48:26,684 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:26,684 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:48:26,685 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash 532440606, now seen corresponding path program 1 times [2018-07-24 12:48:26,685 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:26,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:26,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:26,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:26,688 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:27,310 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:48:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:27,557 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:27,557 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 12:48:27,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:27,572 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:27,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:28,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:28,435 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:28,436 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:48:28,436 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:28,436 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:28,437 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:28,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:28,437 INFO L87 Difference]: Start difference. First operand 3806 states and 5301 transitions. Second operand 3 states. [2018-07-24 12:48:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:30,040 INFO L93 Difference]: Finished difference Result 10835 states and 15387 transitions. [2018-07-24 12:48:30,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:30,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-07-24 12:48:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:30,076 INFO L225 Difference]: With dead ends: 10835 [2018-07-24 12:48:30,076 INFO L226 Difference]: Without dead ends: 7035 [2018-07-24 12:48:30,091 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7035 states. [2018-07-24 12:48:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7035 to 6804. [2018-07-24 12:48:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6804 states. [2018-07-24 12:48:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6804 states to 6804 states and 9219 transitions. [2018-07-24 12:48:30,257 INFO L78 Accepts]: Start accepts. Automaton has 6804 states and 9219 transitions. Word has length 237 [2018-07-24 12:48:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:30,258 INFO L471 AbstractCegarLoop]: Abstraction has 6804 states and 9219 transitions. [2018-07-24 12:48:30,258 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 6804 states and 9219 transitions. [2018-07-24 12:48:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-07-24 12:48:30,279 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:30,280 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2018-07-24 12:48:30,280 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 12:48:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1694838421, now seen corresponding path program 1 times [2018-07-24 12:48:30,280 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:30,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:30,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:30,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:30,282 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 126 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:30,739 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:30,739 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:30,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:30,748 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:31,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:48:31,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 96 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-07-24 12:48:32,386 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:48:32,387 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2018-07-24 12:48:32,387 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:32,387 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:32,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:32,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:48:32,388 INFO L87 Difference]: Start difference. First operand 6804 states and 9219 transitions. Second operand 5 states. [2018-07-24 12:48:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:34,785 INFO L93 Difference]: Finished difference Result 14102 states and 19554 transitions. [2018-07-24 12:48:34,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:48:34,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2018-07-24 12:48:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:34,828 INFO L225 Difference]: With dead ends: 14102 [2018-07-24 12:48:34,829 INFO L226 Difference]: Without dead ends: 7304 [2018-07-24 12:48:34,852 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:48:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2018-07-24 12:48:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 6922. [2018-07-24 12:48:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6922 states. [2018-07-24 12:48:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 9017 transitions. [2018-07-24 12:48:35,039 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 9017 transitions. Word has length 270 [2018-07-24 12:48:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:35,039 INFO L471 AbstractCegarLoop]: Abstraction has 6922 states and 9017 transitions. [2018-07-24 12:48:35,040 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 9017 transitions. [2018-07-24 12:48:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-07-24 12:48:35,063 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:35,064 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:35,064 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 12:48:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1121213627, now seen corresponding path program 1 times [2018-07-24 12:48:35,064 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:35,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:35,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:35,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:35,065 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:35,379 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:35,379 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 12:48:35,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:35,390 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:35,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:48:35,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 98 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:36,313 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:48:36,313 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-07-24 12:48:36,313 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:36,314 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:48:36,314 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:48:36,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:48:36,314 INFO L87 Difference]: Start difference. First operand 6922 states and 9017 transitions. Second operand 6 states. [2018-07-24 12:48:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:39,835 INFO L93 Difference]: Finished difference Result 14830 states and 19946 transitions. [2018-07-24 12:48:39,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:48:39,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 271 [2018-07-24 12:48:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:39,889 INFO L225 Difference]: With dead ends: 14830 [2018-07-24 12:48:39,889 INFO L226 Difference]: Without dead ends: 7487 [2018-07-24 12:48:39,918 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 534 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:48:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2018-07-24 12:48:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 7267. [2018-07-24 12:48:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7267 states. [2018-07-24 12:48:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 9391 transitions. [2018-07-24 12:48:40,124 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 9391 transitions. Word has length 271 [2018-07-24 12:48:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:40,124 INFO L471 AbstractCegarLoop]: Abstraction has 7267 states and 9391 transitions. [2018-07-24 12:48:40,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:48:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 9391 transitions. [2018-07-24 12:48:40,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-07-24 12:48:40,151 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:40,152 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:40,152 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 12:48:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash -74050670, now seen corresponding path program 1 times [2018-07-24 12:48:40,152 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:40,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:40,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:40,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:40,154 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:40,900 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:40,900 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:40,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:40,914 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:41,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:48:41,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 102 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:41,548 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:48:41,549 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:48:41,549 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:41,550 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:41,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:41,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:48:41,550 INFO L87 Difference]: Start difference. First operand 7267 states and 9391 transitions. Second operand 5 states. [2018-07-24 12:48:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:44,047 INFO L93 Difference]: Finished difference Result 20411 states and 26954 transitions. [2018-07-24 12:48:44,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:48:44,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2018-07-24 12:48:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:44,112 INFO L225 Difference]: With dead ends: 20411 [2018-07-24 12:48:44,112 INFO L226 Difference]: Without dead ends: 13150 [2018-07-24 12:48:44,128 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 541 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:48:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13150 states. [2018-07-24 12:48:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13150 to 11917. [2018-07-24 12:48:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11917 states. [2018-07-24 12:48:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11917 states to 11917 states and 15447 transitions. [2018-07-24 12:48:44,404 INFO L78 Accepts]: Start accepts. Automaton has 11917 states and 15447 transitions. Word has length 273 [2018-07-24 12:48:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:44,405 INFO L471 AbstractCegarLoop]: Abstraction has 11917 states and 15447 transitions. [2018-07-24 12:48:44,405 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11917 states and 15447 transitions. [2018-07-24 12:48:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-07-24 12:48:44,440 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:44,441 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:44,441 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 12:48:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1531730753, now seen corresponding path program 1 times [2018-07-24 12:48:44,441 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:44,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:44,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:44,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:44,443 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:44,718 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-07-24 12:48:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 143 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-07-24 12:48:45,144 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:45,144 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 12:48:45,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:45,163 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:45,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-07-24 12:48:45,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 12:48:45,615 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:48:45,616 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2018-07-24 12:48:45,616 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:45,616 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:45,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:45,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:48:45,617 INFO L87 Difference]: Start difference. First operand 11917 states and 15447 transitions. Second operand 3 states. [2018-07-24 12:48:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:46,739 INFO L93 Difference]: Finished difference Result 23826 states and 30889 transitions. [2018-07-24 12:48:46,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:46,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2018-07-24 12:48:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:46,776 INFO L225 Difference]: With dead ends: 23826 [2018-07-24 12:48:46,776 INFO L226 Difference]: Without dead ends: 11915 [2018-07-24 12:48:46,796 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:48:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11915 states. [2018-07-24 12:48:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11915 to 11915. [2018-07-24 12:48:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11915 states. [2018-07-24 12:48:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 15441 transitions. [2018-07-24 12:48:47,031 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 15441 transitions. Word has length 299 [2018-07-24 12:48:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:47,031 INFO L471 AbstractCegarLoop]: Abstraction has 11915 states and 15441 transitions. [2018-07-24 12:48:47,031 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 15441 transitions. [2018-07-24 12:48:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-07-24 12:48:47,062 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:47,062 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] [2018-07-24 12:48:47,063 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 12:48:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 104512490, now seen corresponding path program 1 times [2018-07-24 12:48:47,063 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:47,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:47,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:47,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:47,064 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:47,677 WARN L169 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 8 [2018-07-24 12:48:47,879 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 12:48:47,879 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:47,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:48:47,879 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:47,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:48:47,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:48:47,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:48:47,880 INFO L87 Difference]: Start difference. First operand 11915 states and 15441 transitions. Second operand 6 states. [2018-07-24 12:48:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:50,186 INFO L93 Difference]: Finished difference Result 30468 states and 39551 transitions. [2018-07-24 12:48:50,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:48:50,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 296 [2018-07-24 12:48:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:50,240 INFO L225 Difference]: With dead ends: 30468 [2018-07-24 12:48:50,241 INFO L226 Difference]: Without dead ends: 18559 [2018-07-24 12:48:50,263 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:48:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18559 states. [2018-07-24 12:48:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18559 to 18149. [2018-07-24 12:48:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18149 states. [2018-07-24 12:48:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18149 states to 18149 states and 22550 transitions. [2018-07-24 12:48:50,594 INFO L78 Accepts]: Start accepts. Automaton has 18149 states and 22550 transitions. Word has length 296 [2018-07-24 12:48:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:50,595 INFO L471 AbstractCegarLoop]: Abstraction has 18149 states and 22550 transitions. [2018-07-24 12:48:50,595 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:48:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18149 states and 22550 transitions. [2018-07-24 12:48:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-07-24 12:48:50,636 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:50,636 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:48:50,636 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 12:48:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1369725945, now seen corresponding path program 1 times [2018-07-24 12:48:50,637 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:50,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:50,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:50,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:50,638 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:51,259 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:48:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:51,390 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:51,390 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 12:48:51,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:51,398 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:51,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:51,872 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:52,168 WARN L169 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-07-24 12:48:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:52,629 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:52,629 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 12:48:52,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:52,648 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:53,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:53,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:53,902 WARN L169 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-07-24 12:48:54,008 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-07-24 12:48:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 146 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:54,686 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:48:54,687 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 16 [2018-07-24 12:48:54,687 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:48:54,688 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:48:54,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:48:54,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:48:54,689 INFO L87 Difference]: Start difference. First operand 18149 states and 22550 transitions. Second operand 9 states. [2018-07-24 12:49:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:03,382 INFO L93 Difference]: Finished difference Result 53581 states and 72594 transitions. [2018-07-24 12:49:03,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-24 12:49:03,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 318 [2018-07-24 12:49:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:03,521 INFO L225 Difference]: With dead ends: 53581 [2018-07-24 12:49:03,522 INFO L226 Difference]: Without dead ends: 35438 [2018-07-24 12:49:03,570 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1330 GetRequests, 1278 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=578, Invalid=2284, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 12:49:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35438 states. [2018-07-24 12:49:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35438 to 34217. [2018-07-24 12:49:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34217 states. [2018-07-24 12:49:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34217 states to 34217 states and 41469 transitions. [2018-07-24 12:49:04,280 INFO L78 Accepts]: Start accepts. Automaton has 34217 states and 41469 transitions. Word has length 318 [2018-07-24 12:49:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:04,281 INFO L471 AbstractCegarLoop]: Abstraction has 34217 states and 41469 transitions. [2018-07-24 12:49:04,281 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:49:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 34217 states and 41469 transitions. [2018-07-24 12:49:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-07-24 12:49:04,329 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:04,330 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:49:04,330 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 12:49:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1912577508, now seen corresponding path program 1 times [2018-07-24 12:49:04,331 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:04,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:04,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:04,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:04,332 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 192 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:04,976 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:04,976 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 12:49:04,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:04,986 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:05,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-07-24 12:49:05,502 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:05,661 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-07-24 12:49:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 175 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:49:05,992 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:05,992 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:06,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:06,008 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:06,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-07-24 12:49:07,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 175 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:49:07,577 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:07,577 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 6, 8] total 29 [2018-07-24 12:49:07,578 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:07,579 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:49:07,579 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:49:07,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2018-07-24 12:49:07,580 INFO L87 Difference]: Start difference. First operand 34217 states and 41469 transitions. Second operand 15 states. [2018-07-24 12:49:17,289 WARN L169 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:49:19,275 WARN L169 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-07-24 12:49:20,859 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-07-24 12:49:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:26,634 INFO L93 Difference]: Finished difference Result 120474 states and 151413 transitions. [2018-07-24 12:49:26,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-24 12:49:26,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 341 [2018-07-24 12:49:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:26,988 INFO L225 Difference]: With dead ends: 120474 [2018-07-24 12:49:26,988 INFO L226 Difference]: Without dead ends: 86263 [2018-07-24 12:49:27,089 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1557 GetRequests, 1378 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12643 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4311, Invalid=27551, Unknown=0, NotChecked=0, Total=31862 [2018-07-24 12:49:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86263 states. [2018-07-24 12:49:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86263 to 84873. [2018-07-24 12:49:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84873 states. [2018-07-24 12:49:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84873 states to 84873 states and 102549 transitions. [2018-07-24 12:49:28,931 INFO L78 Accepts]: Start accepts. Automaton has 84873 states and 102549 transitions. Word has length 341 [2018-07-24 12:49:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:28,932 INFO L471 AbstractCegarLoop]: Abstraction has 84873 states and 102549 transitions. [2018-07-24 12:49:28,932 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 12:49:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 84873 states and 102549 transitions. [2018-07-24 12:49:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-07-24 12:49:29,003 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:29,004 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:29,004 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 12:49:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1550739307, now seen corresponding path program 1 times [2018-07-24 12:49:29,005 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:29,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:29,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:29,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:29,006 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 212 proven. 64 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:49:29,400 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:29,401 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:29,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:29,409 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:29,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 273 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:49:30,019 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:30,300 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-07-24 12:49:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:49:30,884 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:30,885 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:30,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:30,902 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:31,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 148 proven. 11 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-07-24 12:49:31,879 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 207 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:49:33,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:33,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 27 [2018-07-24 12:49:33,178 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:33,179 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 12:49:33,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 12:49:33,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:49:33,180 INFO L87 Difference]: Start difference. First operand 84873 states and 102549 transitions. Second operand 12 states. [2018-07-24 12:49:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:44,895 INFO L93 Difference]: Finished difference Result 203732 states and 255074 transitions. [2018-07-24 12:49:44,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-24 12:49:44,896 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 373 [2018-07-24 12:49:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:45,331 INFO L225 Difference]: With dead ends: 203732 [2018-07-24 12:49:45,331 INFO L226 Difference]: Without dead ends: 118865 [2018-07-24 12:49:45,486 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1578 GetRequests, 1509 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2018-07-24 12:49:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118865 states. [2018-07-24 12:49:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118865 to 116773. [2018-07-24 12:49:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116773 states. [2018-07-24 12:49:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116773 states to 116773 states and 135901 transitions. [2018-07-24 12:49:47,978 INFO L78 Accepts]: Start accepts. Automaton has 116773 states and 135901 transitions. Word has length 373 [2018-07-24 12:49:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:47,978 INFO L471 AbstractCegarLoop]: Abstraction has 116773 states and 135901 transitions. [2018-07-24 12:49:47,978 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 12:49:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 116773 states and 135901 transitions. [2018-07-24 12:49:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-07-24 12:49:48,102 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:48,103 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:49:48,103 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 12:49:48,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2139333143, now seen corresponding path program 1 times [2018-07-24 12:49:48,103 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:48,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:48,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:48,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:48,105 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:48,520 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 12:49:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 264 proven. 139 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:49:48,760 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:48,760 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:48,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:48,768 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:49,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-07-24 12:49:49,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 266 proven. 128 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:49:50,325 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:49:50,326 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-07-24 12:49:50,326 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:49:50,326 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:49:50,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:49:50,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:49:50,327 INFO L87 Difference]: Start difference. First operand 116773 states and 135901 transitions. Second operand 5 states. [2018-07-24 12:49:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:53,053 INFO L93 Difference]: Finished difference Result 298158 states and 352980 transitions. [2018-07-24 12:49:53,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:49:53,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 436 [2018-07-24 12:49:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:53,616 INFO L225 Difference]: With dead ends: 298158 [2018-07-24 12:49:53,617 INFO L226 Difference]: Without dead ends: 181416 [2018-07-24 12:49:53,797 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 864 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:49:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181416 states. [2018-07-24 12:49:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181416 to 179019. [2018-07-24 12:49:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179019 states. [2018-07-24 12:49:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179019 states to 179019 states and 207480 transitions. [2018-07-24 12:49:58,038 INFO L78 Accepts]: Start accepts. Automaton has 179019 states and 207480 transitions. Word has length 436 [2018-07-24 12:49:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:58,038 INFO L471 AbstractCegarLoop]: Abstraction has 179019 states and 207480 transitions. [2018-07-24 12:49:58,039 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:49:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 179019 states and 207480 transitions. [2018-07-24 12:49:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-07-24 12:49:58,173 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:58,174 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:58,174 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 12:49:58,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1962715911, now seen corresponding path program 1 times [2018-07-24 12:49:58,174 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:58,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:58,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:58,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:58,176 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 297 proven. 20 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-07-24 12:49:58,661 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:58,662 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 12:49:58,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:58,672 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:59,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-07-24 12:49:59,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 297 proven. 20 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-07-24 12:50:00,575 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:00,575 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 12:50:00,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:00,593 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:01,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-07-24 12:50:01,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 291 proven. 157 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-07-24 12:50:02,102 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:50:02,102 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 8, 8] total 15 [2018-07-24 12:50:02,103 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:50:02,104 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:50:02,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:50:02,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:50:02,105 INFO L87 Difference]: Start difference. First operand 179019 states and 207480 transitions. Second operand 8 states. [2018-07-24 12:50:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:14,699 INFO L93 Difference]: Finished difference Result 399692 states and 486213 transitions. [2018-07-24 12:50:14,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-24 12:50:14,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 459 [2018-07-24 12:50:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:15,593 INFO L225 Difference]: With dead ends: 399692 [2018-07-24 12:50:15,594 INFO L226 Difference]: Without dead ends: 220679 [2018-07-24 12:50:16,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1903 GetRequests, 1857 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=422, Invalid=1740, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 12:50:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220679 states. [2018-07-24 12:50:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220679 to 214967. [2018-07-24 12:50:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214967 states. [2018-07-24 12:50:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214967 states to 214967 states and 245734 transitions. [2018-07-24 12:50:26,840 INFO L78 Accepts]: Start accepts. Automaton has 214967 states and 245734 transitions. Word has length 459 [2018-07-24 12:50:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:26,840 INFO L471 AbstractCegarLoop]: Abstraction has 214967 states and 245734 transitions. [2018-07-24 12:50:26,840 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:50:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 214967 states and 245734 transitions. [2018-07-24 12:50:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-07-24 12:50:26,944 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:26,944 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:26,944 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 12:50:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1203114493, now seen corresponding path program 1 times [2018-07-24 12:50:26,945 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:26,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:26,947 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 306 proven. 128 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:50:27,642 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:27,642 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 12:50:27,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:27,649 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:27,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 433 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:50:28,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 433 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:50:28,451 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:28,451 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 12:50:28,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:28,912 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:29,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 410 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:29,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 433 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:50:30,026 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:50:30,027 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 12 [2018-07-24 12:50:30,027 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:50:30,028 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:50:30,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:50:30,028 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:50:30,028 INFO L87 Difference]: Start difference. First operand 214967 states and 245734 transitions. Second operand 9 states. [2018-07-24 12:50:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:56,111 INFO L93 Difference]: Finished difference Result 763189 states and 972041 transitions. [2018-07-24 12:50:56,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 12:50:56,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 459 [2018-07-24 12:50:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:58,088 INFO L225 Difference]: With dead ends: 763189 [2018-07-24 12:50:58,088 INFO L226 Difference]: Without dead ends: 548248 [2018-07-24 12:50:58,488 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1902 GetRequests, 1859 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2018-07-24 12:50:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548248 states. [2018-07-24 12:51:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548248 to 521426. [2018-07-24 12:51:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521426 states. [2018-07-24 12:51:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521426 states to 521426 states and 597184 transitions. [2018-07-24 12:51:10,652 INFO L78 Accepts]: Start accepts. Automaton has 521426 states and 597184 transitions. Word has length 459 [2018-07-24 12:51:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:10,653 INFO L471 AbstractCegarLoop]: Abstraction has 521426 states and 597184 transitions. [2018-07-24 12:51:10,653 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:51:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 521426 states and 597184 transitions. [2018-07-24 12:51:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-07-24 12:51:10,917 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:10,917 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:10,917 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 12:51:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2049436564, now seen corresponding path program 1 times [2018-07-24 12:51:10,918 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:10,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:10,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:10,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:10,919 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 474 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-07-24 12:51:13,045 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:13,045 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 12:51:13,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:13,053 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:13,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-07-24 12:51:13,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:13,954 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-07-24 12:51:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 313 proven. 195 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:51:14,346 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:14,346 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 12:51:14,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:14,363 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:15,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-07-24 12:51:15,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 313 proven. 195 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:51:22,120 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:22,120 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 8] total 17 [2018-07-24 12:51:22,120 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:22,121 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:51:22,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:51:22,122 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:51:22,122 INFO L87 Difference]: Start difference. First operand 521426 states and 597184 transitions. Second operand 13 states. Received shutdown request... [2018-07-24 12:51:36,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-24 12:51:36,172 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:51:36,176 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:51:36,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:51:36 BoogieIcfgContainer [2018-07-24 12:51:36,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:51:36,177 INFO L168 Benchmark]: Toolchain (without parser) took 218572.20 ms. Allocated memory was 1.5 GB in the beginning and 5.7 GB in the end (delta: 4.2 GB). Free memory was 1.4 GB in the beginning and 4.1 GB in the end (delta: -2.7 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-07-24 12:51:36,178 INFO L168 Benchmark]: CDTParser took 0.30 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 12:51:36,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1484.90 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:36,179 INFO L168 Benchmark]: Boogie Procedure Inliner took 175.91 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 12:51:36,180 INFO L168 Benchmark]: Boogie Preprocessor took 400.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -943.5 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:36,181 INFO L168 Benchmark]: RCFGBuilder took 5301.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 282.5 MB). Peak memory consumption was 282.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:36,181 INFO L168 Benchmark]: TraceAbstraction took 211205.10 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-07-24 12:51:36,185 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 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 1484.90 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 175.91 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 400.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -943.5 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5301.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 282.5 MB). Peak memory consumption was 282.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211205.10 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1509]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1509). Cancelled while BasicCegarLoop was constructing difference of abstraction (521426states) and interpolant automaton (currently 53 states, 13 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 66 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 211.1s OverallTime, 18 OverallIterations, 6 TraceHistogramMax, 130.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3925 SDtfs, 36021 SDslu, 5828 SDs, 0 SdLazy, 52030 SolverSat, 12252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15262 GetRequests, 14680 SyntacticMatches, 25 SemanticMatches, 556 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16897 ImplicationChecksByTransitivity, 22.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=521426occurred 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: 33.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 42325 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 31.1s InterpolantComputationTime, 12748 NumberOfCodeBlocks, 12748 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 19981 ConstructedInterpolants, 0 QuantifiedInterpolants, 24569657 SizeOfPredicates, 130 NumberOfNonLiveVariables, 27904 ConjunctsInSsa, 303 ConjunctsInUnsatCore, 60 InterpolantComputations, 13 PerfectInterpolantSequences, 13391/15026 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_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-51-36-197.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-51-36-197.csv Completed graceful shutdown