java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label42_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:28:49,676 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:28:49,679 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:28:49,691 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:28:49,692 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:28:49,693 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:28:49,694 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:28:49,696 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:28:49,698 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:28:49,699 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:28:49,700 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:28:49,700 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:28:49,701 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:28:49,702 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:28:49,703 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:28:49,704 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:28:49,705 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:28:49,707 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:28:49,712 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:28:49,716 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:28:49,717 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:28:49,720 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:28:49,723 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:28:49,723 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:28:49,723 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:28:49,724 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:28:49,727 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:28:49,729 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:28:49,730 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:28:49,731 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:28:49,731 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:28:49,734 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:28:49,734 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:28:49,734 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:28:49,735 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:28:49,737 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:28:49,737 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 [2018-09-10 10:28:49,767 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:28:49,767 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:28:49,769 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:28:49,769 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:28:49,769 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:28:49,769 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:28:49,770 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:28:49,770 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:28:49,770 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:28:49,770 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:28:49,770 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:28:49,771 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:28:49,772 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:28:49,773 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:28:49,773 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:28:49,773 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:28:49,773 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:28:49,773 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:28:49,774 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:28:49,774 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:28:49,774 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:28:49,774 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:28:49,774 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:28:49,775 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:28:49,775 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:28:49,775 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:28:49,775 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:28:49,775 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:28:49,776 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:28:49,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:28:49,776 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:28:49,776 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:28:49,776 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:28:49,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:28:49,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:28:49,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:28:49,841 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:28:49,841 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:28:49,842 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label42_true-unreach-call.c [2018-09-10 10:28:50,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/004191dcf/9a9f10e3eba04f6baedaa96a6a3252df/FLAG75bf08fa5 [2018-09-10 10:28:50,562 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:28:50,563 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label42_true-unreach-call.c [2018-09-10 10:28:50,589 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/004191dcf/9a9f10e3eba04f6baedaa96a6a3252df/FLAG75bf08fa5 [2018-09-10 10:28:50,612 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/004191dcf/9a9f10e3eba04f6baedaa96a6a3252df [2018-09-10 10:28:50,625 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:28:50,629 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:28:50,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:28:50,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:28:50,638 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:28:50,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:28:50" (1/1) ... [2018-09-10 10:28:50,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165b881d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:50, skipping insertion in model container [2018-09-10 10:28:50,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:28:50" (1/1) ... [2018-09-10 10:28:50,875 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:28:51,366 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:28:51,386 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:28:51,685 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:28:51,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51 WrapperNode [2018-09-10 10:28:51,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:28:51,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:28:51,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:28:51,767 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:28:51,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:51,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:51,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:28:51,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:28:51,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:28:51,945 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:28:52,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:52,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:52,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:52,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:52,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:52,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:52,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (1/1) ... [2018-09-10 10:28:52,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:28:52,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:28:52,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:28:52,294 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:28:52,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (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 [2018-09-10 10:28:52,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:28:52,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:28:52,370 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 [2018-09-10 10:28:52,370 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 [2018-09-10 10:28:52,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:28:52,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:28:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:28:52,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:28:56,950 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:28:56,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:28:56 BoogieIcfgContainer [2018-09-10 10:28:56,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:28:56,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:28:56,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:28:56,956 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:28:56,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:28:50" (1/3) ... [2018-09-10 10:28:56,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4099e1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:28:56, skipping insertion in model container [2018-09-10 10:28:56,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:51" (2/3) ... [2018-09-10 10:28:56,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4099e1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:28:56, skipping insertion in model container [2018-09-10 10:28:56,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:28:56" (3/3) ... [2018-09-10 10:28:56,960 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label42_true-unreach-call.c [2018-09-10 10:28:56,971 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:28:56,985 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:28:57,045 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:28:57,046 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:28:57,046 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:28:57,047 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:28:57,047 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:28:57,047 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:28:57,047 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:28:57,047 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:28:57,047 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:28:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:28:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-10 10:28:57,102 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:57,104 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:57,105 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:28:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1722479500, now seen corresponding path program 1 times [2018-09-10 10:28:57,112 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:57,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:57,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:57,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:57,162 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:58,083 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-09-10 10:28:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:28:58,385 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:28:58,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 10:28:58,386 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:28:58,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 10:28:58,409 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 10:28:58,410 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:28:58,412 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-10 10:29:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:02,233 INFO L93 Difference]: Finished difference Result 1080 states and 1936 transitions. [2018-09-10 10:29:02,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 10:29:02,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 203 [2018-09-10 10:29:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:02,267 INFO L225 Difference]: With dead ends: 1080 [2018-09-10 10:29:02,267 INFO L226 Difference]: Without dead ends: 762 [2018-09-10 10:29:02,275 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:29:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2018-09-10 10:29:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 520. [2018-09-10 10:29:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-10 10:29:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 919 transitions. [2018-09-10 10:29:02,362 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 919 transitions. Word has length 203 [2018-09-10 10:29:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:02,364 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 919 transitions. [2018-09-10 10:29:02,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 10:29:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 919 transitions. [2018-09-10 10:29:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-10 10:29:02,373 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:02,374 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:02,374 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 951455952, now seen corresponding path program 1 times [2018-09-10 10:29:02,375 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:02,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:02,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:02,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:02,376 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:02,717 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:29:02,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:29:02,717 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:02,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:29:02,720 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:29:02,720 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:29:02,720 INFO L87 Difference]: Start difference. First operand 520 states and 919 transitions. Second operand 6 states. [2018-09-10 10:29:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:06,832 INFO L93 Difference]: Finished difference Result 1604 states and 2923 transitions. [2018-09-10 10:29:06,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:29:06,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 220 [2018-09-10 10:29:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:06,842 INFO L225 Difference]: With dead ends: 1604 [2018-09-10 10:29:06,843 INFO L226 Difference]: Without dead ends: 1090 [2018-09-10 10:29:06,847 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:29:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2018-09-10 10:29:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1050. [2018-09-10 10:29:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1050 states. [2018-09-10 10:29:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1724 transitions. [2018-09-10 10:29:06,930 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1724 transitions. Word has length 220 [2018-09-10 10:29:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:06,931 INFO L480 AbstractCegarLoop]: Abstraction has 1050 states and 1724 transitions. [2018-09-10 10:29:06,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:29:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1724 transitions. [2018-09-10 10:29:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-10 10:29:06,938 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:06,938 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:06,939 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash 947948628, now seen corresponding path program 1 times [2018-09-10 10:29:06,939 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:06,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:06,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:06,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:06,941 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:07,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:07,257 INFO L197 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 [2018-09-10 10:29:07,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:07,266 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:07,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:29:07,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:29:08,269 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:29:08,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-10 10:29:08,270 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:08,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:29:08,271 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:29:08,272 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:29:08,272 INFO L87 Difference]: Start difference. First operand 1050 states and 1724 transitions. Second operand 3 states. [2018-09-10 10:29:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:11,306 INFO L93 Difference]: Finished difference Result 3064 states and 5131 transitions. [2018-09-10 10:29:11,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:29:11,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-09-10 10:29:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:11,325 INFO L225 Difference]: With dead ends: 3064 [2018-09-10 10:29:11,326 INFO L226 Difference]: Without dead ends: 2020 [2018-09-10 10:29:11,331 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 464 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:29:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2018-09-10 10:29:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2012. [2018-09-10 10:29:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2012 states. [2018-09-10 10:29:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 3145 transitions. [2018-09-10 10:29:11,412 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 3145 transitions. Word has length 233 [2018-09-10 10:29:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:11,414 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 3145 transitions. [2018-09-10 10:29:11,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:29:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 3145 transitions. [2018-09-10 10:29:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-10 10:29:11,425 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:11,425 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:11,425 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1673376175, now seen corresponding path program 1 times [2018-09-10 10:29:11,426 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:11,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:11,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:11,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:11,428 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:11,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:11,854 INFO L197 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 [2018-09-10 10:29:11,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:11,869 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:12,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:12,208 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:12,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:12,932 INFO L197 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 [2018-09-10 10:29:12,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:12,961 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:13,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:13,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:14,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:14,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-09-10 10:29:14,425 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:14,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:29:14,427 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:29:14,427 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:29:14,427 INFO L87 Difference]: Start difference. First operand 2012 states and 3145 transitions. Second operand 8 states. [2018-09-10 10:29:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:17,434 INFO L93 Difference]: Finished difference Result 5400 states and 8866 transitions. [2018-09-10 10:29:17,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:29:17,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 234 [2018-09-10 10:29:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:17,460 INFO L225 Difference]: With dead ends: 5400 [2018-09-10 10:29:17,460 INFO L226 Difference]: Without dead ends: 3394 [2018-09-10 10:29:17,472 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 930 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:29:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2018-09-10 10:29:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 3322. [2018-09-10 10:29:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3322 states. [2018-09-10 10:29:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4690 transitions. [2018-09-10 10:29:17,592 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4690 transitions. Word has length 234 [2018-09-10 10:29:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:17,593 INFO L480 AbstractCegarLoop]: Abstraction has 3322 states and 4690 transitions. [2018-09-10 10:29:17,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 10:29:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4690 transitions. [2018-09-10 10:29:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-09-10 10:29:17,607 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:17,607 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:17,608 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:17,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1664136812, now seen corresponding path program 1 times [2018-09-10 10:29:17,608 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:17,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:17,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:17,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:17,609 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:18,034 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:29:18,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:29:18,034 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:29:18,035 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:29:18,035 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:29:18,036 INFO L87 Difference]: Start difference. First operand 3322 states and 4690 transitions. Second operand 3 states. [2018-09-10 10:29:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:19,928 INFO L93 Difference]: Finished difference Result 6641 states and 9418 transitions. [2018-09-10 10:29:19,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:29:19,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 249 [2018-09-10 10:29:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:19,947 INFO L225 Difference]: With dead ends: 6641 [2018-09-10 10:29:19,947 INFO L226 Difference]: Without dead ends: 3325 [2018-09-10 10:29:19,958 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:29:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2018-09-10 10:29:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3086. [2018-09-10 10:29:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3086 states. [2018-09-10 10:29:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4100 transitions. [2018-09-10 10:29:20,045 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4100 transitions. Word has length 249 [2018-09-10 10:29:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:20,046 INFO L480 AbstractCegarLoop]: Abstraction has 3086 states and 4100 transitions. [2018-09-10 10:29:20,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:29:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4100 transitions. [2018-09-10 10:29:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-10 10:29:20,059 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:20,060 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:20,060 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash 655539479, now seen corresponding path program 1 times [2018-09-10 10:29:20,060 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:20,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:20,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:20,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:20,062 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:20,405 WARN L175 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:29:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:21,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:21,312 INFO L197 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 [2018-09-10 10:29:21,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:21,323 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:21,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:21,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:22,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:22,310 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:22,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:22,340 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:22,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:23,254 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:23,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:23,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-10 10:29:23,498 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:23,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 10:29:23,499 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 10:29:23,499 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:29:23,499 INFO L87 Difference]: Start difference. First operand 3086 states and 4100 transitions. Second operand 13 states. [2018-09-10 10:29:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:29,176 INFO L93 Difference]: Finished difference Result 10603 states and 15463 transitions. [2018-09-10 10:29:29,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-10 10:29:29,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 286 [2018-09-10 10:29:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:29,220 INFO L225 Difference]: With dead ends: 10603 [2018-09-10 10:29:29,220 INFO L226 Difference]: Without dead ends: 7523 [2018-09-10 10:29:29,234 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1178 GetRequests, 1146 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2018-09-10 10:29:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7523 states. [2018-09-10 10:29:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7523 to 7322. [2018-09-10 10:29:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7322 states. [2018-09-10 10:29:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 9522 transitions. [2018-09-10 10:29:29,463 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 9522 transitions. Word has length 286 [2018-09-10 10:29:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:29,464 INFO L480 AbstractCegarLoop]: Abstraction has 7322 states and 9522 transitions. [2018-09-10 10:29:29,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 10:29:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 9522 transitions. [2018-09-10 10:29:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-10 10:29:29,506 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:29,506 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:29,506 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:29,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1185542645, now seen corresponding path program 1 times [2018-09-10 10:29:29,507 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:29,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:29,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:29,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:29,508 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:29,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:29,915 INFO L197 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 [2018-09-10 10:29:29,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:29,923 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:30,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-10 10:29:30,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:30,822 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:29:30,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-09-10 10:29:30,822 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:30,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:29:30,823 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:29:30,823 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:29:30,823 INFO L87 Difference]: Start difference. First operand 7322 states and 9522 transitions. Second operand 6 states. [2018-09-10 10:29:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:33,686 INFO L93 Difference]: Finished difference Result 16069 states and 21488 transitions. [2018-09-10 10:29:33,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:29:33,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 318 [2018-09-10 10:29:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:33,748 INFO L225 Difference]: With dead ends: 16069 [2018-09-10 10:29:33,748 INFO L226 Difference]: Without dead ends: 8382 [2018-09-10 10:29:33,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 628 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:29:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8382 states. [2018-09-10 10:29:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8382 to 8207. [2018-09-10 10:29:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8207 states. [2018-09-10 10:29:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8207 states to 8207 states and 10680 transitions. [2018-09-10 10:29:34,050 INFO L78 Accepts]: Start accepts. Automaton has 8207 states and 10680 transitions. Word has length 318 [2018-09-10 10:29:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:34,051 INFO L480 AbstractCegarLoop]: Abstraction has 8207 states and 10680 transitions. [2018-09-10 10:29:34,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:29:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 8207 states and 10680 transitions. [2018-09-10 10:29:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-09-10 10:29:34,096 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:34,096 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:34,096 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash -898609634, now seen corresponding path program 1 times [2018-09-10 10:29:34,097 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:34,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:34,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:34,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:34,098 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 111 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:34,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:34,517 INFO L197 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 [2018-09-10 10:29:34,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:34,525 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:34,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-10 10:29:34,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 111 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:35,290 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:29:35,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 10:29:35,290 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:35,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:29:35,291 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:29:35,292 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:29:35,292 INFO L87 Difference]: Start difference. First operand 8207 states and 10680 transitions. Second operand 5 states. [2018-09-10 10:29:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:37,715 INFO L93 Difference]: Finished difference Result 23124 states and 30864 transitions. [2018-09-10 10:29:37,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:29:37,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2018-09-10 10:29:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:37,784 INFO L225 Difference]: With dead ends: 23124 [2018-09-10 10:29:37,784 INFO L226 Difference]: Without dead ends: 14923 [2018-09-10 10:29:37,827 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 635 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:29:37,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14923 states. [2018-09-10 10:29:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14923 to 13506. [2018-09-10 10:29:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13506 states. [2018-09-10 10:29:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13506 states to 13506 states and 17580 transitions. [2018-09-10 10:29:38,254 INFO L78 Accepts]: Start accepts. Automaton has 13506 states and 17580 transitions. Word has length 320 [2018-09-10 10:29:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:38,254 INFO L480 AbstractCegarLoop]: Abstraction has 13506 states and 17580 transitions. [2018-09-10 10:29:38,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:29:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 13506 states and 17580 transitions. [2018-09-10 10:29:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-10 10:29:38,305 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:38,305 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:29:38,306 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:38,306 INFO L82 PathProgramCache]: Analyzing trace with hash 882636777, now seen corresponding path program 1 times [2018-09-10 10:29:38,306 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:38,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:38,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:38,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:38,308 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:39,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:39,047 INFO L197 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) [2018-09-10 10:29:39,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:39,064 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:39,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:39,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:40,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:40,532 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:40,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:40,552 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:41,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:41,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:41,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:41,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:29:41,508 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:41,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:29:41,509 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:29:41,509 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:29:41,509 INFO L87 Difference]: Start difference. First operand 13506 states and 17580 transitions. Second operand 9 states. [2018-09-10 10:29:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:46,962 INFO L93 Difference]: Finished difference Result 48687 states and 67833 transitions. [2018-09-10 10:29:46,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-10 10:29:46,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 339 [2018-09-10 10:29:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:47,169 INFO L225 Difference]: With dead ends: 48687 [2018-09-10 10:29:47,169 INFO L226 Difference]: Without dead ends: 35041 [2018-09-10 10:29:47,273 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1385 GetRequests, 1349 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2018-09-10 10:29:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35041 states. [2018-09-10 10:29:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35041 to 31674. [2018-09-10 10:29:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31674 states. [2018-09-10 10:29:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31674 states to 31674 states and 40463 transitions. [2018-09-10 10:29:48,599 INFO L78 Accepts]: Start accepts. Automaton has 31674 states and 40463 transitions. Word has length 339 [2018-09-10 10:29:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:48,600 INFO L480 AbstractCegarLoop]: Abstraction has 31674 states and 40463 transitions. [2018-09-10 10:29:48,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:29:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 31674 states and 40463 transitions. [2018-09-10 10:29:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-09-10 10:29:48,670 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:48,670 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:29:48,670 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1871543430, now seen corresponding path program 1 times [2018-09-10 10:29:48,671 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:48,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:48,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:48,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:48,673 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:49,365 WARN L175 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:29:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:49,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:49,727 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:49,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:49,743 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:50,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-09-10 10:29:50,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 146 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:50,333 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:29:50,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-10 10:29:50,333 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:50,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:29:50,334 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:29:50,334 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-09-10 10:29:50,335 INFO L87 Difference]: Start difference. First operand 31674 states and 40463 transitions. Second operand 5 states. [2018-09-10 10:29:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:53,879 INFO L93 Difference]: Finished difference Result 91171 states and 121762 transitions. [2018-09-10 10:29:53,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:29:53,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 357 [2018-09-10 10:29:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:54,170 INFO L225 Difference]: With dead ends: 91171 [2018-09-10 10:29:54,170 INFO L226 Difference]: Without dead ends: 59527 [2018-09-10 10:29:54,306 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:29:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59527 states. [2018-09-10 10:29:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59527 to 57756. [2018-09-10 10:29:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57756 states. [2018-09-10 10:29:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57756 states to 57756 states and 72097 transitions. [2018-09-10 10:29:55,935 INFO L78 Accepts]: Start accepts. Automaton has 57756 states and 72097 transitions. Word has length 357 [2018-09-10 10:29:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:55,936 INFO L480 AbstractCegarLoop]: Abstraction has 57756 states and 72097 transitions. [2018-09-10 10:29:55,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:29:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 57756 states and 72097 transitions. [2018-09-10 10:29:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-10 10:29:56,048 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:56,048 INFO L376 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, 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] [2018-09-10 10:29:56,049 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:29:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash 241599761, now seen corresponding path program 1 times [2018-09-10 10:29:56,049 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:56,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:56,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:56,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:56,050 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:56,724 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:29:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:56,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:56,930 INFO L197 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 [2018-09-10 10:29:56,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:56,941 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:57,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:29:57,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:29:58,092 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:29:58,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-09-10 10:29:58,093 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:58,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:29:58,094 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:29:58,094 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:29:58,094 INFO L87 Difference]: Start difference. First operand 57756 states and 72097 transitions. Second operand 5 states. [2018-09-10 10:30:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:00,302 INFO L93 Difference]: Finished difference Result 150902 states and 196159 transitions. [2018-09-10 10:30:00,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:30:00,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 366 [2018-09-10 10:30:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:00,768 INFO L225 Difference]: With dead ends: 150902 [2018-09-10 10:30:00,768 INFO L226 Difference]: Without dead ends: 93792 [2018-09-10 10:30:00,926 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:30:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93792 states. [2018-09-10 10:30:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93792 to 91806. [2018-09-10 10:30:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91806 states. [2018-09-10 10:30:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91806 states to 91806 states and 114850 transitions. [2018-09-10 10:30:03,912 INFO L78 Accepts]: Start accepts. Automaton has 91806 states and 114850 transitions. Word has length 366 [2018-09-10 10:30:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:03,912 INFO L480 AbstractCegarLoop]: Abstraction has 91806 states and 114850 transitions. [2018-09-10 10:30:03,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:30:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 91806 states and 114850 transitions. [2018-09-10 10:30:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2018-09-10 10:30:04,085 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:04,085 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:30:04,085 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:30:04,086 INFO L82 PathProgramCache]: Analyzing trace with hash -854900624, now seen corresponding path program 1 times [2018-09-10 10:30:04,086 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:04,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:04,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:04,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:04,087 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 289 proven. 6 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-09-10 10:30:04,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:04,478 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:30:04,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:04,491 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:04,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2018-09-10 10:30:05,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 289 proven. 6 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-09-10 10:30:05,221 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:30:05,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2018-09-10 10:30:05,222 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:05,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:30:05,222 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:30:05,222 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:30:05,223 INFO L87 Difference]: Start difference. First operand 91806 states and 114850 transitions. Second operand 3 states. [2018-09-10 10:30:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:08,046 INFO L93 Difference]: Finished difference Result 182937 states and 228922 transitions. [2018-09-10 10:30:08,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:30:08,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2018-09-10 10:30:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:08,386 INFO L225 Difference]: With dead ends: 182937 [2018-09-10 10:30:08,386 INFO L226 Difference]: Without dead ends: 91800 [2018-09-10 10:30:08,534 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 983 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:30:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91800 states. [2018-09-10 10:30:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91800 to 91800. [2018-09-10 10:30:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91800 states. [2018-09-10 10:30:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91800 states to 91800 states and 114818 transitions. [2018-09-10 10:30:10,616 INFO L78 Accepts]: Start accepts. Automaton has 91800 states and 114818 transitions. Word has length 493 [2018-09-10 10:30:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:10,616 INFO L480 AbstractCegarLoop]: Abstraction has 91800 states and 114818 transitions. [2018-09-10 10:30:10,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:30:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 91800 states and 114818 transitions. [2018-09-10 10:30:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-09-10 10:30:10,865 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:10,866 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:30:10,866 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:30:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash 973042302, now seen corresponding path program 1 times [2018-09-10 10:30:10,867 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:10,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:10,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:10,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:10,868 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-10 10:30:11,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:11,719 INFO L197 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 [2018-09-10 10:30:11,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:11,732 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:12,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-09-10 10:30:13,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-10 10:30:13,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:13,462 INFO L197 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 [2018-09-10 10:30:13,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:13,478 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:14,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 359 proven. 2 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-09-10 10:30:14,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 345 proven. 33 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-09-10 10:30:14,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:30:14,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-10 10:30:14,839 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:30:14,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:30:14,841 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:30:14,841 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:30:14,842 INFO L87 Difference]: Start difference. First operand 91800 states and 114818 transitions. Second operand 7 states. [2018-09-10 10:30:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:20,871 INFO L93 Difference]: Finished difference Result 190091 states and 252667 transitions. [2018-09-10 10:30:20,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:30:20,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 500 [2018-09-10 10:30:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:21,344 INFO L225 Difference]: With dead ends: 190091 [2018-09-10 10:30:21,344 INFO L226 Difference]: Without dead ends: 98960 [2018-09-10 10:30:21,533 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2008 GetRequests, 2000 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-10 10:30:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98960 states. [2018-09-10 10:30:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98960 to 94282. [2018-09-10 10:30:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94282 states. [2018-09-10 10:30:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94282 states to 94282 states and 116788 transitions. [2018-09-10 10:30:24,104 INFO L78 Accepts]: Start accepts. Automaton has 94282 states and 116788 transitions. Word has length 500 [2018-09-10 10:30:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:24,105 INFO L480 AbstractCegarLoop]: Abstraction has 94282 states and 116788 transitions. [2018-09-10 10:30:24,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:30:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 94282 states and 116788 transitions. [2018-09-10 10:30:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-09-10 10:30:24,319 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:24,320 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-09-10 10:30:24,320 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:30:24,320 INFO L82 PathProgramCache]: Analyzing trace with hash -685647057, now seen corresponding path program 1 times [2018-09-10 10:30:24,320 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:24,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:24,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:24,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:24,322 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 325 proven. 33 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-10 10:30:25,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:25,485 INFO L197 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 [2018-09-10 10:30:25,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:25,499 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:25,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 357 proven. 4 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-10 10:30:26,003 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 338 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-10 10:30:26,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:26,259 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:30:26,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:26,275 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:27,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 357 proven. 4 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-10 10:30:27,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:27,791 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:30:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 338 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-10 10:30:28,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:30:28,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:30:28,195 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:30:28,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:30:28,196 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:30:28,197 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:30:28,197 INFO L87 Difference]: Start difference. First operand 94282 states and 116788 transitions. Second operand 9 states. [2018-09-10 10:31:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:31:03,991 INFO L93 Difference]: Finished difference Result 763335 states and 1145019 transitions. [2018-09-10 10:31:03,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-10 10:31:03,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 512 [2018-09-10 10:31:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:31:08,068 INFO L225 Difference]: With dead ends: 763335 [2018-09-10 10:31:08,068 INFO L226 Difference]: Without dead ends: 673048 [2018-09-10 10:31:08,678 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2108 GetRequests, 2062 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2018-09-10 10:31:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673048 states. [2018-09-10 10:31:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673048 to 632549. [2018-09-10 10:31:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632549 states. [2018-09-10 10:31:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632549 states to 632549 states and 820090 transitions. [2018-09-10 10:31:33,681 INFO L78 Accepts]: Start accepts. Automaton has 632549 states and 820090 transitions. Word has length 512 [2018-09-10 10:31:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:31:33,682 INFO L480 AbstractCegarLoop]: Abstraction has 632549 states and 820090 transitions. [2018-09-10 10:31:33,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:31:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 632549 states and 820090 transitions. [2018-09-10 10:31:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-10 10:31:35,518 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:31:35,518 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:31:35,519 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:31:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash 804833788, now seen corresponding path program 1 times [2018-09-10 10:31:35,522 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:31:35,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:35,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:35,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:35,523 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:31:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 357 proven. 12 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-09-10 10:31:37,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:31:37,546 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:31:37,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:37,555 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:31:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:37,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:31:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 380 proven. 2 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-09-10 10:31:38,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:31:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 357 proven. 12 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-09-10 10:31:38,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:31:38,270 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:31:38,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:38,285 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:31:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:39,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:31:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 344 proven. 38 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-09-10 10:31:47,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:31:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 357 proven. 12 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-09-10 10:31:47,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:31:47,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-10 10:31:47,198 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:31:47,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:31:47,200 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:31:47,200 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:31:47,200 INFO L87 Difference]: Start difference. First operand 632549 states and 820090 transitions. Second operand 6 states. [2018-09-10 10:32:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:17,546 INFO L93 Difference]: Finished difference Result 1230572 states and 1714297 transitions. [2018-09-10 10:32:17,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:32:17,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 519 [2018-09-10 10:32:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:17,547 INFO L225 Difference]: With dead ends: 1230572 [2018-09-10 10:32:17,547 INFO L226 Difference]: Without dead ends: 0 [2018-09-10 10:32:22,009 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2086 GetRequests, 2076 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:32:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-10 10:32:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-10 10:32:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-10 10:32:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-10 10:32:22,027 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 519 [2018-09-10 10:32:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:22,027 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-10 10:32:22,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:32:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-10 10:32:22,028 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-10 10:32:22,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-10 10:32:22,744 WARN L175 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 60 Received shutdown request... [2018-09-10 10:32:23,241 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-09-10 10:32:23,242 INFO L168 Benchmark]: Toolchain (without parser) took 212616.72 ms. Allocated memory was 1.5 GB in the beginning and 6.2 GB in the end (delta: 4.7 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 4.3 GB. Max. memory is 7.1 GB. [2018-09-10 10:32:23,243 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:32:23,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1136.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-10 10:32:23,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 177.40 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. [2018-09-10 10:32:23,245 INFO L168 Benchmark]: Boogie Preprocessor took 349.10 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -952.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-10 10:32:23,246 INFO L168 Benchmark]: RCFGBuilder took 4657.84 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 281.4 MB). Peak memory consumption was 281.4 MB. Max. memory is 7.1 GB. [2018-09-10 10:32:23,247 INFO L168 Benchmark]: TraceAbstraction took 206288.94 ms. Allocated memory was 2.4 GB in the beginning and 6.2 GB in the end (delta: 3.9 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. [2018-09-10 10:32:23,252 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1136.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 177.40 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 349.10 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -952.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4657.84 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 281.4 MB). Peak memory consumption was 281.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206288.94 ms. Allocated memory was 2.4 GB in the beginning and 6.2 GB in the end (delta: 3.9 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1623]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 28. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label42_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-32-23-271.csv Completed graceful shutdown