java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label40_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 15:02:47,889 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 15:02:47,891 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 15:02:47,902 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 15:02:47,903 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 15:02:47,904 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 15:02:47,905 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 15:02:47,907 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 15:02:47,908 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 15:02:47,909 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 15:02:47,910 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 15:02:47,911 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 15:02:47,912 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 15:02:47,912 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 15:02:47,913 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 15:02:47,914 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 15:02:47,915 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 15:02:47,917 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 15:02:47,919 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 15:02:47,920 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 15:02:47,922 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 15:02:47,923 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 15:02:47,927 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 15:02:47,928 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 15:02:47,929 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 15:02:47,931 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 15:02:47,932 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 15:02:47,934 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 15:02:47,934 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 15:02:47,939 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 15:02:47,940 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 15:02:47,941 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 15:02:47,941 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 15:02:47,941 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 15:02:47,943 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 15:02:47,944 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 15:02:47,944 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 15:02:47,971 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 15:02:47,971 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 15:02:47,972 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 15:02:47,972 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 15:02:47,972 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 15:02:47,973 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 15:02:47,973 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 15:02:47,974 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 15:02:47,974 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 15:02:47,974 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 15:02:47,974 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 15:02:47,975 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 15:02:47,976 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 15:02:47,976 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 15:02:47,976 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 15:02:47,976 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 15:02:47,976 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 15:02:47,977 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 15:02:47,977 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 15:02:47,977 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 15:02:47,977 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 15:02:47,979 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 15:02:47,979 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 15:02:47,979 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 15:02:47,979 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 15:02:47,980 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 15:02:47,980 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 15:02:47,980 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 15:02:47,980 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 15:02:47,981 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 15:02:47,981 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 15:02:47,981 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 15:02:47,981 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 15:02:48,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 15:02:48,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 15:02:48,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 15:02:48,047 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 15:02:48,047 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 15:02:48,048 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label40_true-unreach-call.c [2018-07-24 15:02:48,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c4b541f3/0e006030ede7466fae7c595da622a616/FLAG51397b857 [2018-07-24 15:02:48,827 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 15:02:48,828 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label40_true-unreach-call.c [2018-07-24 15:02:48,860 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c4b541f3/0e006030ede7466fae7c595da622a616/FLAG51397b857 [2018-07-24 15:02:48,882 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c4b541f3/0e006030ede7466fae7c595da622a616 [2018-07-24 15:02:48,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 15:02:48,898 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 15:02:48,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 15:02:48,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 15:02:48,908 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 15:02:48,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 03:02:48" (1/1) ... [2018-07-24 15:02:48,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a59828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:48, skipping insertion in model container [2018-07-24 15:02:48,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 03:02:48" (1/1) ... [2018-07-24 15:02:49,235 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 15:02:50,112 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 15:02:50,129 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 15:02:50,727 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 15:02:50,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50 WrapperNode [2018-07-24 15:02:50,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 15:02:50,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 15:02:50,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 15:02:50,888 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 15:02:50,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:50,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 15:02:51,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 15:02:51,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 15:02:51,107 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 15:02:51,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... [2018-07-24 15:02:51,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 15:02:51,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 15:02:51,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 15:02:51,691 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 15:02:51,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 15:02:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 15:02:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 15:02:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 15:02:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 15:02:51,764 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_output3 [2018-07-24 15:02:51,764 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_output3 [2018-07-24 15:02:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 15:02:51,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 15:02:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 15:02:51,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 15:02:51,765 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_output2 [2018-07-24 15:02:51,765 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_output2 [2018-07-24 15:02:59,943 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 15:02:59,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 03:02:59 BoogieIcfgContainer [2018-07-24 15:02:59,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 15:02:59,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 15:02:59,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 15:02:59,949 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 15:02:59,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 03:02:48" (1/3) ... [2018-07-24 15:02:59,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e4bd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 03:02:59, skipping insertion in model container [2018-07-24 15:02:59,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:02:50" (2/3) ... [2018-07-24 15:02:59,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e4bd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 03:02:59, skipping insertion in model container [2018-07-24 15:02:59,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 03:02:59" (3/3) ... [2018-07-24 15:02:59,953 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label40_true-unreach-call.c [2018-07-24 15:02:59,964 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 15:02:59,973 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 15:03:00,037 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 15:03:00,038 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 15:03:00,038 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 15:03:00,039 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 15:03:00,039 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 15:03:00,039 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 15:03:00,039 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 15:03:00,039 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 15:03:00,040 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 15:03:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-07-24 15:03:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-24 15:03:00,089 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:03:00,091 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:03:00,091 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:03:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1535733793, now seen corresponding path program 1 times [2018-07-24 15:03:00,100 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:03:00,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:00,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:00,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:00,156 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:03:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:00,602 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:03:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:00,627 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:03:00,628 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:03:00,628 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:03:00,637 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:03:00,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:03:00,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:03:00,658 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-07-24 15:03:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:03:07,356 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-07-24 15:03:07,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:03:07,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-07-24 15:03:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:03:07,390 INFO L225 Difference]: With dead ends: 2251 [2018-07-24 15:03:07,390 INFO L226 Difference]: Without dead ends: 1474 [2018-07-24 15:03:07,399 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:03:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-07-24 15:03:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-07-24 15:03:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-07-24 15:03:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2721 transitions. [2018-07-24 15:03:07,561 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2721 transitions. Word has length 51 [2018-07-24 15:03:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:03:07,562 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2721 transitions. [2018-07-24 15:03:07,562 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:03:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2721 transitions. [2018-07-24 15:03:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-24 15:03:07,570 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:03:07,571 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:03:07,571 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:03:07,571 INFO L82 PathProgramCache]: Analyzing trace with hash 918347569, now seen corresponding path program 1 times [2018-07-24 15:03:07,571 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:03:07,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:07,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:07,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:07,573 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:03:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:07,909 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:03:07,909 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 15:03:07,910 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:03:07,911 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 15:03:07,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 15:03:07,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 15:03:07,912 INFO L87 Difference]: Start difference. First operand 1474 states and 2721 transitions. Second operand 6 states. [2018-07-24 15:03:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:03:17,600 INFO L93 Difference]: Finished difference Result 4419 states and 8244 transitions. [2018-07-24 15:03:17,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 15:03:17,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-07-24 15:03:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:03:17,622 INFO L225 Difference]: With dead ends: 4419 [2018-07-24 15:03:17,622 INFO L226 Difference]: Without dead ends: 2951 [2018-07-24 15:03:17,627 INFO L573 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 [2018-07-24 15:03:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2018-07-24 15:03:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2928. [2018-07-24 15:03:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2928 states. [2018-07-24 15:03:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 5087 transitions. [2018-07-24 15:03:17,723 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 5087 transitions. Word has length 140 [2018-07-24 15:03:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:03:17,723 INFO L471 AbstractCegarLoop]: Abstraction has 2928 states and 5087 transitions. [2018-07-24 15:03:17,724 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 15:03:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 5087 transitions. [2018-07-24 15:03:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-07-24 15:03:17,729 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:03:17,730 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:03:17,730 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:03:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1167490922, now seen corresponding path program 1 times [2018-07-24 15:03:17,731 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:03:17,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:17,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:17,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:17,732 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:03:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:18,065 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:03:18,065 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 15:03:18,065 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:03:18,066 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 15:03:18,066 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 15:03:18,067 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 15:03:18,067 INFO L87 Difference]: Start difference. First operand 2928 states and 5087 transitions. Second operand 6 states. [2018-07-24 15:03:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:03:27,388 INFO L93 Difference]: Finished difference Result 10194 states and 17948 transitions. [2018-07-24 15:03:27,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 15:03:27,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2018-07-24 15:03:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:03:27,442 INFO L225 Difference]: With dead ends: 10194 [2018-07-24 15:03:27,443 INFO L226 Difference]: Without dead ends: 7272 [2018-07-24 15:03:27,461 INFO L573 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 [2018-07-24 15:03:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7272 states. [2018-07-24 15:03:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7272 to 7208. [2018-07-24 15:03:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7208 states. [2018-07-24 15:03:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7208 states to 7208 states and 11881 transitions. [2018-07-24 15:03:27,727 INFO L78 Accepts]: Start accepts. Automaton has 7208 states and 11881 transitions. Word has length 187 [2018-07-24 15:03:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:03:27,729 INFO L471 AbstractCegarLoop]: Abstraction has 7208 states and 11881 transitions. [2018-07-24 15:03:27,729 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 15:03:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 7208 states and 11881 transitions. [2018-07-24 15:03:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-24 15:03:27,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:03:27,737 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:03:27,737 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:03:27,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1898915834, now seen corresponding path program 1 times [2018-07-24 15:03:27,738 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:03:27,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:27,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:27,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:27,740 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:03:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:28,653 WARN L169 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-07-24 15:03:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:28,863 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:03:28,863 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-07-24 15:03:28,863 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:03:28,864 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 15:03:28,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 15:03:28,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-07-24 15:03:28,865 INFO L87 Difference]: Start difference. First operand 7208 states and 11881 transitions. Second operand 9 states. [2018-07-24 15:03:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:03:38,424 INFO L93 Difference]: Finished difference Result 17369 states and 29099 transitions. [2018-07-24 15:03:38,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-24 15:03:38,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 189 [2018-07-24 15:03:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:03:38,471 INFO L225 Difference]: With dead ends: 17369 [2018-07-24 15:03:38,471 INFO L226 Difference]: Without dead ends: 10167 [2018-07-24 15:03:38,492 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-07-24 15:03:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10167 states. [2018-07-24 15:03:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10167 to 10087. [2018-07-24 15:03:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10087 states. [2018-07-24 15:03:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 15380 transitions. [2018-07-24 15:03:38,733 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 15380 transitions. Word has length 189 [2018-07-24 15:03:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:03:38,734 INFO L471 AbstractCegarLoop]: Abstraction has 10087 states and 15380 transitions. [2018-07-24 15:03:38,734 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 15:03:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 15380 transitions. [2018-07-24 15:03:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-07-24 15:03:38,744 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:03:38,744 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2018-07-24 15:03:38,745 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:03:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1975831983, now seen corresponding path program 1 times [2018-07-24 15:03:38,745 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:03:38,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:38,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:38,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:38,747 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:03:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:03:39,210 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:03:39,211 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:03:39,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:39,221 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:03:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:39,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:03:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-07-24 15:03:39,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:03:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:03:39,999 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:03:39,999 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-07-24 15:03:39,999 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:03:40,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:03:40,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:03:40,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 15:03:40,002 INFO L87 Difference]: Start difference. First operand 10087 states and 15380 transitions. Second operand 5 states. [2018-07-24 15:03:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:03:49,873 INFO L93 Difference]: Finished difference Result 30812 states and 47942 transitions. [2018-07-24 15:03:49,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 15:03:49,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2018-07-24 15:03:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:03:50,003 INFO L225 Difference]: With dead ends: 30812 [2018-07-24 15:03:50,004 INFO L226 Difference]: Without dead ends: 20731 [2018-07-24 15:03:50,056 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 520 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 15:03:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20731 states. [2018-07-24 15:03:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20731 to 20575. [2018-07-24 15:03:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20575 states. [2018-07-24 15:03:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20575 states to 20575 states and 28623 transitions. [2018-07-24 15:03:50,604 INFO L78 Accepts]: Start accepts. Automaton has 20575 states and 28623 transitions. Word has length 261 [2018-07-24 15:03:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:03:50,605 INFO L471 AbstractCegarLoop]: Abstraction has 20575 states and 28623 transitions. [2018-07-24 15:03:50,605 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:03:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 20575 states and 28623 transitions. [2018-07-24 15:03:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-07-24 15:03:50,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:03:50,616 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 15:03:50,616 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:03:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1459166454, now seen corresponding path program 1 times [2018-07-24 15:03:50,617 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:03:50,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:50,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:50,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:03:50,618 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:03:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:50,938 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:03:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 89 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:52,057 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:03:52,057 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:03:52,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:52,073 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:03:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:52,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:03:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:52,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:03:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:52,733 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:03:52,733 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:03:52,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:03:52,765 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:03:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:03:52,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:03:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:53,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:03:53,442 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 15:03:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:03:54,048 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:03:54,049 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 16 [2018-07-24 15:03:54,049 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:03:54,050 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 15:03:54,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 15:03:54,050 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-07-24 15:03:54,050 INFO L87 Difference]: Start difference. First operand 20575 states and 28623 transitions. Second operand 13 states. [2018-07-24 15:04:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:04:11,105 INFO L93 Difference]: Finished difference Result 58586 states and 85775 transitions. [2018-07-24 15:04:11,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 15:04:11,105 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 310 [2018-07-24 15:04:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:04:11,278 INFO L225 Difference]: With dead ends: 58586 [2018-07-24 15:04:11,278 INFO L226 Difference]: Without dead ends: 30100 [2018-07-24 15:04:11,416 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1299 GetRequests, 1247 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=656, Invalid=1894, Unknown=0, NotChecked=0, Total=2550 [2018-07-24 15:04:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30100 states. [2018-07-24 15:04:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30100 to 29080. [2018-07-24 15:04:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29080 states. [2018-07-24 15:04:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29080 states to 29080 states and 34361 transitions. [2018-07-24 15:04:12,116 INFO L78 Accepts]: Start accepts. Automaton has 29080 states and 34361 transitions. Word has length 310 [2018-07-24 15:04:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:04:12,117 INFO L471 AbstractCegarLoop]: Abstraction has 29080 states and 34361 transitions. [2018-07-24 15:04:12,117 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 15:04:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 29080 states and 34361 transitions. [2018-07-24 15:04:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-07-24 15:04:12,131 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:04:12,131 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:04:12,132 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:04:12,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1697051857, now seen corresponding path program 1 times [2018-07-24 15:04:12,132 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:04:12,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:12,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:12,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:12,133 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:04:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 15:04:12,480 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:04:12,481 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 15:04:12,481 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:04:12,481 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 15:04:12,482 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 15:04:12,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 15:04:12,482 INFO L87 Difference]: Start difference. First operand 29080 states and 34361 transitions. Second operand 4 states. [2018-07-24 15:04:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:04:20,442 INFO L93 Difference]: Finished difference Result 80565 states and 97904 transitions. [2018-07-24 15:04:20,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 15:04:20,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 370 [2018-07-24 15:04:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:04:20,662 INFO L225 Difference]: With dead ends: 80565 [2018-07-24 15:04:20,663 INFO L226 Difference]: Without dead ends: 51491 [2018-07-24 15:04:20,760 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 15:04:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51491 states. [2018-07-24 15:04:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51491 to 51491. [2018-07-24 15:04:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51491 states. [2018-07-24 15:04:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51491 states to 51491 states and 61246 transitions. [2018-07-24 15:04:21,698 INFO L78 Accepts]: Start accepts. Automaton has 51491 states and 61246 transitions. Word has length 370 [2018-07-24 15:04:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:04:21,699 INFO L471 AbstractCegarLoop]: Abstraction has 51491 states and 61246 transitions. [2018-07-24 15:04:21,699 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 15:04:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 51491 states and 61246 transitions. [2018-07-24 15:04:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-07-24 15:04:21,724 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:04:21,725 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:04:21,725 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:04:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1148039703, now seen corresponding path program 1 times [2018-07-24 15:04:21,726 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:04:21,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:21,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:21,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:21,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:04:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:22,094 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:04:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 302 proven. 160 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 15:04:23,051 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:04:23,051 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:04:23,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:23,362 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:04:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:23,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:04:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-07-24 15:04:23,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:04:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-07-24 15:04:23,876 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 15:04:23,876 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-07-24 15:04:23,876 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:04:23,877 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:04:23,877 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:04:23,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-07-24 15:04:23,877 INFO L87 Difference]: Start difference. First operand 51491 states and 61246 transitions. Second operand 3 states. [2018-07-24 15:04:27,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:04:27,822 INFO L93 Difference]: Finished difference Result 101635 states and 121117 transitions. [2018-07-24 15:04:27,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:04:27,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 414 [2018-07-24 15:04:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:04:27,967 INFO L225 Difference]: With dead ends: 101635 [2018-07-24 15:04:27,968 INFO L226 Difference]: Without dead ends: 50150 [2018-07-24 15:04:28,081 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 830 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-07-24 15:04:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50150 states. [2018-07-24 15:04:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50150 to 47324. [2018-07-24 15:04:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47324 states. [2018-07-24 15:04:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47324 states to 47324 states and 53822 transitions. [2018-07-24 15:04:28,759 INFO L78 Accepts]: Start accepts. Automaton has 47324 states and 53822 transitions. Word has length 414 [2018-07-24 15:04:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:04:28,760 INFO L471 AbstractCegarLoop]: Abstraction has 47324 states and 53822 transitions. [2018-07-24 15:04:28,760 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:04:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 47324 states and 53822 transitions. [2018-07-24 15:04:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2018-07-24 15:04:28,821 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:04:28,821 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:04:28,821 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:04:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1194958324, now seen corresponding path program 1 times [2018-07-24 15:04:28,822 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:04:28,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:28,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:28,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:28,823 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:04:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 152 proven. 52 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 15:04:29,975 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:04:29,975 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:04:29,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:29,985 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:04:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:30,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:04:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 15:04:30,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:04:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 15:04:31,015 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 15:04:31,015 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 15:04:31,016 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:04:31,016 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:04:31,016 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:04:31,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 15:04:31,017 INFO L87 Difference]: Start difference. First operand 47324 states and 53822 transitions. Second operand 3 states. [2018-07-24 15:04:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:04:34,342 INFO L93 Difference]: Finished difference Result 93046 states and 105928 transitions. [2018-07-24 15:04:34,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:04:34,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 562 [2018-07-24 15:04:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:04:34,452 INFO L225 Difference]: With dead ends: 93046 [2018-07-24 15:04:34,452 INFO L226 Difference]: Without dead ends: 45728 [2018-07-24 15:04:34,897 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1125 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 15:04:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45728 states. [2018-07-24 15:04:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45728 to 45728. [2018-07-24 15:04:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45728 states. [2018-07-24 15:04:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45728 states to 45728 states and 51212 transitions. [2018-07-24 15:04:35,498 INFO L78 Accepts]: Start accepts. Automaton has 45728 states and 51212 transitions. Word has length 562 [2018-07-24 15:04:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:04:35,499 INFO L471 AbstractCegarLoop]: Abstraction has 45728 states and 51212 transitions. [2018-07-24 15:04:35,499 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:04:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 45728 states and 51212 transitions. [2018-07-24 15:04:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2018-07-24 15:04:35,568 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:04:35,568 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:04:35,569 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:04:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767708, now seen corresponding path program 1 times [2018-07-24 15:04:35,569 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:04:35,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:35,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:35,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:35,570 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:04:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 363 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 15:04:36,475 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:04:36,475 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:04:36,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:36,483 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:04:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:36,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:04:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 363 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 15:04:37,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:04:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 363 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 15:04:38,069 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:04:38,069 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:04:38,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:38,084 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:04:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:38,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:04:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 363 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 15:04:38,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:04:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 363 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 15:04:39,825 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:04:39,825 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 15:04:39,826 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:04:39,828 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 15:04:39,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 15:04:39,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 15:04:39,829 INFO L87 Difference]: Start difference. First operand 45728 states and 51212 transitions. Second operand 9 states. [2018-07-24 15:04:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:04:48,166 INFO L93 Difference]: Finished difference Result 104508 states and 122208 transitions. [2018-07-24 15:04:48,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 15:04:48,167 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 719 [2018-07-24 15:04:48,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:04:48,372 INFO L225 Difference]: With dead ends: 104508 [2018-07-24 15:04:48,372 INFO L226 Difference]: Without dead ends: 58786 [2018-07-24 15:04:48,495 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2900 GetRequests, 2871 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-07-24 15:04:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58786 states. [2018-07-24 15:04:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58786 to 57588. [2018-07-24 15:04:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57588 states. [2018-07-24 15:04:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57588 states to 57588 states and 65850 transitions. [2018-07-24 15:04:49,616 INFO L78 Accepts]: Start accepts. Automaton has 57588 states and 65850 transitions. Word has length 719 [2018-07-24 15:04:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:04:49,618 INFO L471 AbstractCegarLoop]: Abstraction has 57588 states and 65850 transitions. [2018-07-24 15:04:49,618 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 15:04:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 57588 states and 65850 transitions. [2018-07-24 15:04:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2018-07-24 15:04:50,100 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:04:50,102 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:04:50,102 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:04:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash -980772075, now seen corresponding path program 1 times [2018-07-24 15:04:50,104 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:04:50,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:50,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:50,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:04:50,105 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:04:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 15:04:51,118 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:04:51,118 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:04:51,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:51,126 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:04:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:51,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:04:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 15:04:51,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:04:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 15:04:52,817 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:04:52,817 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:04:52,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:04:52,836 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:04:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:04:53,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:04:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 15:04:53,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:04:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 15:04:55,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:04:55,153 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 15:04:55,153 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:04:55,155 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 15:04:55,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 15:04:55,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 15:04:55,156 INFO L87 Difference]: Start difference. First operand 57588 states and 65850 transitions. Second operand 9 states. [2018-07-24 15:05:02,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:05:02,310 INFO L93 Difference]: Finished difference Result 112049 states and 126955 transitions. [2018-07-24 15:05:02,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 15:05:02,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 836 [2018-07-24 15:05:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:05:02,414 INFO L225 Difference]: With dead ends: 112049 [2018-07-24 15:05:02,414 INFO L226 Difference]: Without dead ends: 48679 [2018-07-24 15:05:02,500 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3362 GetRequests, 3336 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 15:05:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48679 states. [2018-07-24 15:05:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48679 to 46372. [2018-07-24 15:05:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46372 states. [2018-07-24 15:05:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46372 states to 46372 states and 49696 transitions. [2018-07-24 15:05:03,112 INFO L78 Accepts]: Start accepts. Automaton has 46372 states and 49696 transitions. Word has length 836 [2018-07-24 15:05:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:05:03,112 INFO L471 AbstractCegarLoop]: Abstraction has 46372 states and 49696 transitions. [2018-07-24 15:05:03,112 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 15:05:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 46372 states and 49696 transitions. [2018-07-24 15:05:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2018-07-24 15:05:03,467 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:05:03,468 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 15:05:03,468 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:05:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash -805964668, now seen corresponding path program 1 times [2018-07-24 15:05:03,469 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:05:03,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:03,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:03,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:03,472 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:05:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 258 proven. 277 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 15:05:04,437 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:05:04,437 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:05:04,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:04,445 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:05:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:04,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:05:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 609 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-07-24 15:05:05,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:05:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 258 proven. 277 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 15:05:06,253 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:05:06,253 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:05:06,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:06,269 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:05:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:06,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:05:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 609 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-07-24 15:05:07,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:05:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 258 proven. 277 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 15:05:08,040 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:05:08,041 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 15:05:08,041 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:05:08,043 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 15:05:08,043 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 15:05:08,043 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 15:05:08,043 INFO L87 Difference]: Start difference. First operand 46372 states and 49696 transitions. Second operand 9 states. [2018-07-24 15:05:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:05:19,400 INFO L93 Difference]: Finished difference Result 118086 states and 130077 transitions. [2018-07-24 15:05:19,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 15:05:19,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 845 [2018-07-24 15:05:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:05:19,573 INFO L225 Difference]: With dead ends: 118086 [2018-07-24 15:05:19,573 INFO L226 Difference]: Without dead ends: 72423 [2018-07-24 15:05:19,643 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3402 GetRequests, 3379 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-07-24 15:05:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72423 states. [2018-07-24 15:05:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72423 to 71844. [2018-07-24 15:05:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71844 states. [2018-07-24 15:05:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71844 states to 71844 states and 78155 transitions. [2018-07-24 15:05:20,514 INFO L78 Accepts]: Start accepts. Automaton has 71844 states and 78155 transitions. Word has length 845 [2018-07-24 15:05:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:05:20,515 INFO L471 AbstractCegarLoop]: Abstraction has 71844 states and 78155 transitions. [2018-07-24 15:05:20,515 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 15:05:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 71844 states and 78155 transitions. [2018-07-24 15:05:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2018-07-24 15:05:20,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:05:20,557 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 15:05:20,557 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:05:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash -580093845, now seen corresponding path program 1 times [2018-07-24 15:05:20,557 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:05:20,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:20,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:20,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:20,559 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:05:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:20,886 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:05:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 132 proven. 236 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2018-07-24 15:05:22,023 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:05:22,023 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:05:22,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:22,037 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:05:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:22,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:05:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2018-07-24 15:05:23,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:05:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 132 proven. 170 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2018-07-24 15:05:23,646 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:05:23,646 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 3] total 9 [2018-07-24 15:05:23,646 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:05:23,647 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:05:23,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:05:23,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-07-24 15:05:23,648 INFO L87 Difference]: Start difference. First operand 71844 states and 78155 transitions. Second operand 3 states. [2018-07-24 15:05:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:05:27,632 INFO L93 Difference]: Finished difference Result 157604 states and 172287 transitions. [2018-07-24 15:05:27,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:05:27,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 956 [2018-07-24 15:05:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:05:27,863 INFO L225 Difference]: With dead ends: 157604 [2018-07-24 15:05:27,864 INFO L226 Difference]: Without dead ends: 86373 [2018-07-24 15:05:28,011 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1919 GetRequests, 1911 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-07-24 15:05:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86373 states. [2018-07-24 15:05:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86373 to 84957. [2018-07-24 15:05:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84957 states. [2018-07-24 15:05:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84957 states to 84957 states and 91771 transitions. [2018-07-24 15:05:29,165 INFO L78 Accepts]: Start accepts. Automaton has 84957 states and 91771 transitions. Word has length 956 [2018-07-24 15:05:29,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:05:29,166 INFO L471 AbstractCegarLoop]: Abstraction has 84957 states and 91771 transitions. [2018-07-24 15:05:29,166 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:05:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 84957 states and 91771 transitions. [2018-07-24 15:05:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1035 [2018-07-24 15:05:29,210 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:05:29,210 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:05:29,210 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:05:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash 123696415, now seen corresponding path program 1 times [2018-07-24 15:05:29,211 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:05:29,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:29,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:29,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:29,212 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:05:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 236 proven. 667 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-07-24 15:05:31,501 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:05:31,502 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:05:31,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:31,511 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:05:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:31,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:05:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 585 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2018-07-24 15:05:32,332 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:05:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 220 proven. 525 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-07-24 15:05:33,388 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:05:33,388 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 12 [2018-07-24 15:05:33,388 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:05:33,389 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:05:33,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:05:33,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-07-24 15:05:33,390 INFO L87 Difference]: Start difference. First operand 84957 states and 91771 transitions. Second operand 5 states. [2018-07-24 15:05:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:05:39,192 INFO L93 Difference]: Finished difference Result 166184 states and 179847 transitions. [2018-07-24 15:05:39,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 15:05:39,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1034 [2018-07-24 15:05:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:05:39,363 INFO L225 Difference]: With dead ends: 166184 [2018-07-24 15:05:39,363 INFO L226 Difference]: Without dead ends: 76406 [2018-07-24 15:05:39,463 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2081 GetRequests, 2062 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-07-24 15:05:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76406 states. [2018-07-24 15:05:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76406 to 75408. [2018-07-24 15:05:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75408 states. [2018-07-24 15:05:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75408 states to 75408 states and 80809 transitions. [2018-07-24 15:05:40,296 INFO L78 Accepts]: Start accepts. Automaton has 75408 states and 80809 transitions. Word has length 1034 [2018-07-24 15:05:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:05:40,297 INFO L471 AbstractCegarLoop]: Abstraction has 75408 states and 80809 transitions. [2018-07-24 15:05:40,297 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:05:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 75408 states and 80809 transitions. [2018-07-24 15:05:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1563 [2018-07-24 15:05:40,339 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:05:40,340 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 15:05:40,340 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:05:40,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1265819094, now seen corresponding path program 1 times [2018-07-24 15:05:40,340 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:05:40,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:40,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:40,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:40,341 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:05:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 296 proven. 1404 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2018-07-24 15:05:42,538 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:05:42,538 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:05:42,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:42,548 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:05:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:42,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:05:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-07-24 15:05:44,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:05:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2247 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-07-24 15:05:45,352 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 15:05:45,353 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-07-24 15:05:45,353 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:05:45,353 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:05:45,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:05:45,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-07-24 15:05:45,354 INFO L87 Difference]: Start difference. First operand 75408 states and 80809 transitions. Second operand 3 states. [2018-07-24 15:05:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:05:51,125 INFO L93 Difference]: Finished difference Result 172371 states and 186141 transitions. [2018-07-24 15:05:51,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:05:51,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1562 [2018-07-24 15:05:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:05:51,386 INFO L225 Difference]: With dead ends: 172371 [2018-07-24 15:05:51,387 INFO L226 Difference]: Without dead ends: 97680 [2018-07-24 15:05:51,517 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3141 GetRequests, 3131 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-07-24 15:05:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97680 states. [2018-07-24 15:05:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97680 to 96967. [2018-07-24 15:05:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96967 states. [2018-07-24 15:05:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96967 states to 96967 states and 103635 transitions. [2018-07-24 15:05:53,010 INFO L78 Accepts]: Start accepts. Automaton has 96967 states and 103635 transitions. Word has length 1562 [2018-07-24 15:05:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:05:53,011 INFO L471 AbstractCegarLoop]: Abstraction has 96967 states and 103635 transitions. [2018-07-24 15:05:53,011 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:05:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 96967 states and 103635 transitions. [2018-07-24 15:05:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1835 [2018-07-24 15:05:53,114 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:05:53,115 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 15:05:53,115 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:05:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1919287881, now seen corresponding path program 1 times [2018-07-24 15:05:53,116 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:05:53,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:53,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:53,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:05:53,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:05:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:54,214 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:05:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3167 backedges. 792 proven. 1517 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2018-07-24 15:05:56,373 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:05:56,373 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:05:56,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:56,381 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:05:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:05:56,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:05:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3167 backedges. 2266 proven. 2 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2018-07-24 15:05:58,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:05:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3167 backedges. 1071 proven. 277 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2018-07-24 15:05:59,908 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:05:59,909 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:05:59,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:05:59,925 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:06:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:06:01,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:06:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3167 backedges. 2266 proven. 2 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2018-07-24 15:06:02,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:06:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3167 backedges. 1071 proven. 277 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2018-07-24 15:06:03,784 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:06:03,786 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 13 [2018-07-24 15:06:03,786 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:06:03,788 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 15:06:03,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 15:06:03,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-07-24 15:06:03,789 INFO L87 Difference]: Start difference. First operand 96967 states and 103635 transitions. Second operand 12 states. [2018-07-24 15:06:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:06:13,197 INFO L93 Difference]: Finished difference Result 187785 states and 199089 transitions. [2018-07-24 15:06:13,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 15:06:13,197 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1834 [2018-07-24 15:06:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:06:13,378 INFO L225 Difference]: With dead ends: 187785 [2018-07-24 15:06:13,378 INFO L226 Difference]: Without dead ends: 91535 [2018-07-24 15:06:13,459 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7369 GetRequests, 7343 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2018-07-24 15:06:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91535 states. [2018-07-24 15:06:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91535 to 91460. [2018-07-24 15:06:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91460 states. [2018-07-24 15:06:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91460 states to 91460 states and 95347 transitions. [2018-07-24 15:06:14,435 INFO L78 Accepts]: Start accepts. Automaton has 91460 states and 95347 transitions. Word has length 1834 [2018-07-24 15:06:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:06:14,436 INFO L471 AbstractCegarLoop]: Abstraction has 91460 states and 95347 transitions. [2018-07-24 15:06:14,436 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 15:06:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 91460 states and 95347 transitions. [2018-07-24 15:06:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1844 [2018-07-24 15:06:14,528 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:06:14,529 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:06:14,530 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:06:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2005679274, now seen corresponding path program 1 times [2018-07-24 15:06:14,530 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:06:14,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:06:14,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:06:14,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:06:14,531 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:06:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:06:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 1103 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:06:21,932 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:06:21,933 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:06:22,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:06:22,103 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:06:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:06:22,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:06:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 2082 proven. 2 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2018-07-24 15:06:24,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:06:24,731 WARN L169 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 15:06:25,073 WARN L169 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 15:06:25,946 WARN L169 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-07-24 15:06:26,300 WARN L169 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 29 Received shutdown request... [2018-07-24 15:06:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 490 proven. 248 refuted. 0 times theorem prover too weak. 2138 trivial. 0 not checked. [2018-07-24 15:06:29,936 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:06:29,936 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 15:06:29,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:06:29,955 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:06:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:06:31,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:06:31,163 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 15:06:31,364 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:06:31,365 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 15:06:31,369 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 15:06:31,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 03:06:31 BoogieIcfgContainer [2018-07-24 15:06:31,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 15:06:31,371 INFO L168 Benchmark]: Toolchain (without parser) took 222473.54 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -873.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-07-24 15:06:31,372 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 15:06:31,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1987.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 169.1 MB). Peak memory consumption was 169.1 MB. Max. memory is 7.1 GB. [2018-07-24 15:06:31,373 INFO L168 Benchmark]: Boogie Procedure Inliner took 219.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 15:06:31,374 INFO L168 Benchmark]: Boogie Preprocessor took 583.06 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 847.2 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2018-07-24 15:06:31,375 INFO L168 Benchmark]: RCFGBuilder took 8254.27 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 536.2 MB). Peak memory consumption was 536.2 MB. Max. memory is 7.1 GB. [2018-07-24 15:06:31,375 INFO L168 Benchmark]: TraceAbstraction took 211424.45 ms. Allocated memory was 2.4 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -538.8 MB). Peak memory consumption was 842.2 MB. Max. memory is 7.1 GB. [2018-07-24 15:06:31,380 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1987.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 169.1 MB). Peak memory consumption was 169.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 219.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 583.06 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 847.2 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8254.27 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 536.2 MB). Peak memory consumption was 536.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211424.45 ms. Allocated memory was 2.4 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -538.8 MB). Peak memory consumption was 842.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 141]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 141). Cancelled while BasicCegarLoop was analyzing trace of length 1844 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 33 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 211.3s OverallTime, 17 OverallIterations, 7 TraceHistogramMax, 133.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5243 SDtfs, 49480 SDslu, 2481 SDs, 0 SdLazy, 79297 SolverSat, 17221 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 100.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28033 GetRequests, 27768 SyntacticMatches, 56 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96967occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 11455 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 33.2s InterpolantComputationTime, 24147 NumberOfCodeBlocks, 24147 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 37976 ConstructedInterpolants, 50 QuantifiedInterpolants, 90352652 SizeOfPredicates, 13 NumberOfNonLiveVariables, 18177 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 48 InterpolantComputations, 14 PerfectInterpolantSequences, 34885/41293 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label40_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_15-06-31-393.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label40_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_15-06-31-393.csv Completed graceful shutdown