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_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:57:20,896 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:57:20,898 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:57:20,918 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:57:20,918 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:57:20,920 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:57:20,921 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:57:20,923 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:57:20,928 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:57:20,936 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:57:20,937 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:57:20,937 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:57:20,938 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:57:20,941 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:57:20,945 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:57:20,946 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:57:20,947 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:57:20,952 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:57:20,957 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:57:20,960 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:57:20,961 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:57:20,963 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:57:20,966 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:57:20,968 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:57:20,968 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:57:20,969 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:57:20,970 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:57:20,971 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:57:20,972 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:57:20,974 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:57:20,974 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:57:20,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:57:20,976 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:57:20,976 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:57:20,977 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:57:20,978 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:57:20,979 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 14:57:21,008 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:57:21,009 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:57:21,010 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:57:21,010 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:57:21,010 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:57:21,013 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:57:21,013 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:57:21,013 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:57:21,014 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:57:21,014 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:57:21,014 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:57:21,015 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:57:21,015 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:57:21,016 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:57:21,016 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:57:21,017 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:57:21,017 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:57:21,017 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:57:21,017 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:57:21,017 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:57:21,018 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:57:21,018 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:57:21,018 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:57:21,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:57:21,019 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:57:21,019 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:57:21,019 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:57:21,019 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:57:21,019 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:57:21,020 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:57:21,020 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:57:21,020 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:57:21,020 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:57:21,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:57:21,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:57:21,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:57:21,094 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:57:21,094 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:57:21,095 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label05_true-unreach-call.c [2018-07-24 14:57:21,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c7a00f7/11a619e0325d4c48b96ee490a02efca0/FLAG0c185a2c6 [2018-07-24 14:57:21,906 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:57:21,907 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label05_true-unreach-call.c [2018-07-24 14:57:21,938 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c7a00f7/11a619e0325d4c48b96ee490a02efca0/FLAG0c185a2c6 [2018-07-24 14:57:21,960 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c7a00f7/11a619e0325d4c48b96ee490a02efca0 [2018-07-24 14:57:21,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:57:21,975 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:57:21,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:57:21,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:57:21,987 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:57:21,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:57:21" (1/1) ... [2018-07-24 14:57:21,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@212fe84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:21, skipping insertion in model container [2018-07-24 14:57:21,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:57:21" (1/1) ... [2018-07-24 14:57:22,318 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:57:23,111 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:57:23,127 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:57:23,591 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:57:23,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23 WrapperNode [2018-07-24 14:57:23,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:57:23,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:57:23,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:57:23,732 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:57:23,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:23,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:23,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:57:23,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:57:23,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:57:23,911 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:57:24,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:24,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:24,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:24,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:24,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:24,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:24,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... [2018-07-24 14:57:24,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:57:24,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:57:24,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:57:24,506 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:57:24,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:57:24,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:57:24,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:57:24,571 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 14:57:24,571 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 14:57:24,571 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 14:57:24,571 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 14:57:24,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:57:24,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:57:24,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:57:24,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:57:24,572 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 14:57:24,572 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 14:57:31,734 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:57:31,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:57:31 BoogieIcfgContainer [2018-07-24 14:57:31,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:57:31,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:57:31,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:57:31,740 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:57:31,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:57:21" (1/3) ... [2018-07-24 14:57:31,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a678ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:57:31, skipping insertion in model container [2018-07-24 14:57:31,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:57:23" (2/3) ... [2018-07-24 14:57:31,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a678ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:57:31, skipping insertion in model container [2018-07-24 14:57:31,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:57:31" (3/3) ... [2018-07-24 14:57:31,744 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label05_true-unreach-call.c [2018-07-24 14:57:31,755 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:57:31,765 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:57:31,825 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:57:31,826 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:57:31,827 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:57:31,827 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:57:31,827 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:57:31,827 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:57:31,827 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:57:31,827 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:57:31,827 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:57:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-07-24 14:57:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-24 14:57:31,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:57:31,874 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] [2018-07-24 14:57:31,875 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 14:57:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 53628393, now seen corresponding path program 1 times [2018-07-24 14:57:31,883 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:57:31,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:31,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:57:31,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:31,929 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:57:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:57:32,389 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-07-24 14:57:32,407 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 14:57:32,409 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:57:32,409 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:57:32,410 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:57:32,415 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:57:32,431 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:57:32,432 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:57:32,435 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-07-24 14:57:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:57:43,049 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-07-24 14:57:43,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:57:43,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-07-24 14:57:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:57:43,089 INFO L225 Difference]: With dead ends: 2974 [2018-07-24 14:57:43,089 INFO L226 Difference]: Without dead ends: 2193 [2018-07-24 14:57:43,099 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:57:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-07-24 14:57:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1474. [2018-07-24 14:57:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-07-24 14:57:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2384 transitions. [2018-07-24 14:57:43,287 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2384 transitions. Word has length 45 [2018-07-24 14:57:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:57:43,291 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2384 transitions. [2018-07-24 14:57:43,291 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:57:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2384 transitions. [2018-07-24 14:57:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-24 14:57:43,303 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:57:43,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:43,306 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 14:57:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1961939866, now seen corresponding path program 1 times [2018-07-24 14:57:43,307 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:57:43,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:43,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:57:43,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:43,309 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:57:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:57:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:57:43,587 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:57:43,587 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:57:43,588 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:57:43,590 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:57:43,590 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:57:43,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:57:43,590 INFO L87 Difference]: Start difference. First operand 1474 states and 2384 transitions. Second operand 5 states. [2018-07-24 14:57:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:57:54,910 INFO L93 Difference]: Finished difference Result 4422 states and 7235 transitions. [2018-07-24 14:57:54,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:57:54,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2018-07-24 14:57:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:57:54,936 INFO L225 Difference]: With dead ends: 4422 [2018-07-24 14:57:54,936 INFO L226 Difference]: Without dead ends: 2954 [2018-07-24 14:57:54,943 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:57:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2018-07-24 14:57:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2930. [2018-07-24 14:57:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2930 states. [2018-07-24 14:57:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4516 transitions. [2018-07-24 14:57:55,061 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4516 transitions. Word has length 115 [2018-07-24 14:57:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:57:55,062 INFO L471 AbstractCegarLoop]: Abstraction has 2930 states and 4516 transitions. [2018-07-24 14:57:55,062 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:57:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4516 transitions. [2018-07-24 14:57:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-24 14:57:55,067 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:57:55,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:55,067 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 14:57:55,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2061635486, now seen corresponding path program 1 times [2018-07-24 14:57:55,068 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:57:55,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:55,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:57:55,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:57:55,069 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:57:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:57:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:57:55,420 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:57:55,420 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:57:55,420 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:57:55,421 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:57:55,421 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:57:55,421 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:57:55,421 INFO L87 Difference]: Start difference. First operand 2930 states and 4516 transitions. Second operand 6 states. [2018-07-24 14:58:00,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:00,886 INFO L93 Difference]: Finished difference Result 7357 states and 11327 transitions. [2018-07-24 14:58:00,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:58:00,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-07-24 14:58:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:00,915 INFO L225 Difference]: With dead ends: 7357 [2018-07-24 14:58:00,915 INFO L226 Difference]: Without dead ends: 4433 [2018-07-24 14:58:00,926 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 14:58:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2018-07-24 14:58:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 4400. [2018-07-24 14:58:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4400 states. [2018-07-24 14:58:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 5842 transitions. [2018-07-24 14:58:01,038 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 5842 transitions. Word has length 119 [2018-07-24 14:58:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:01,039 INFO L471 AbstractCegarLoop]: Abstraction has 4400 states and 5842 transitions. [2018-07-24 14:58:01,039 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:58:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 5842 transitions. [2018-07-24 14:58:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-24 14:58:01,041 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:01,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:58:01,042 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 14:58:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash 2071614941, now seen corresponding path program 1 times [2018-07-24 14:58:01,042 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:01,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:01,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:01,044 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:01,265 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:58:01,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:58:01,265 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:01,266 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:58:01,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:58:01,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:58:01,267 INFO L87 Difference]: Start difference. First operand 4400 states and 5842 transitions. Second operand 4 states. [2018-07-24 14:58:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:06,864 INFO L93 Difference]: Finished difference Result 8794 states and 11692 transitions. [2018-07-24 14:58:06,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:58:06,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2018-07-24 14:58:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:06,892 INFO L225 Difference]: With dead ends: 8794 [2018-07-24 14:58:06,892 INFO L226 Difference]: Without dead ends: 4400 [2018-07-24 14:58:06,908 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 14:58:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2018-07-24 14:58:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 4400. [2018-07-24 14:58:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4400 states. [2018-07-24 14:58:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 5384 transitions. [2018-07-24 14:58:06,999 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 5384 transitions. Word has length 152 [2018-07-24 14:58:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:06,999 INFO L471 AbstractCegarLoop]: Abstraction has 4400 states and 5384 transitions. [2018-07-24 14:58:06,999 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:58:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 5384 transitions. [2018-07-24 14:58:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-24 14:58:07,003 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:07,003 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:58:07,003 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 14:58:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash 247886990, now seen corresponding path program 1 times [2018-07-24 14:58:07,004 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:07,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:07,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:07,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:07,005 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:58:07,261 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:58:07,261 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:58:07,261 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:07,262 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:58:07,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:58:07,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:58:07,263 INFO L87 Difference]: Start difference. First operand 4400 states and 5384 transitions. Second operand 4 states. [2018-07-24 14:58:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:16,538 INFO L93 Difference]: Finished difference Result 17362 states and 21717 transitions. [2018-07-24 14:58:16,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:58:16,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 222 [2018-07-24 14:58:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:16,598 INFO L225 Difference]: With dead ends: 17362 [2018-07-24 14:58:16,598 INFO L226 Difference]: Without dead ends: 12968 [2018-07-24 14:58:16,623 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 14:58:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12968 states. [2018-07-24 14:58:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12968 to 12968. [2018-07-24 14:58:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12968 states. [2018-07-24 14:58:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12968 states to 12968 states and 15592 transitions. [2018-07-24 14:58:16,882 INFO L78 Accepts]: Start accepts. Automaton has 12968 states and 15592 transitions. Word has length 222 [2018-07-24 14:58:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:16,883 INFO L471 AbstractCegarLoop]: Abstraction has 12968 states and 15592 transitions. [2018-07-24 14:58:16,883 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:58:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12968 states and 15592 transitions. [2018-07-24 14:58:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-24 14:58:16,898 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:16,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:58:16,899 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 14:58:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1784736877, now seen corresponding path program 1 times [2018-07-24 14:58:16,899 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:16,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:16,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:16,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:16,902 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:17,342 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:58:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 14:58:17,772 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:17,772 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 14:58:17,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:17,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:17,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:18,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:18,435 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:58:18,435 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-07-24 14:58:18,435 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:58:18,436 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:58:18,436 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:58:18,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:58:18,437 INFO L87 Difference]: Start difference. First operand 12968 states and 15592 transitions. Second operand 3 states. [2018-07-24 14:58:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:24,080 INFO L93 Difference]: Finished difference Result 35864 states and 43555 transitions. [2018-07-24 14:58:24,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:58:24,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 360 [2018-07-24 14:58:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:24,148 INFO L225 Difference]: With dead ends: 35864 [2018-07-24 14:58:24,148 INFO L226 Difference]: Without dead ends: 22902 [2018-07-24 14:58:24,206 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 722 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:58:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22902 states. [2018-07-24 14:58:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22902 to 22199. [2018-07-24 14:58:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22199 states. [2018-07-24 14:58:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22199 states to 22199 states and 25980 transitions. [2018-07-24 14:58:24,653 INFO L78 Accepts]: Start accepts. Automaton has 22199 states and 25980 transitions. Word has length 360 [2018-07-24 14:58:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:24,654 INFO L471 AbstractCegarLoop]: Abstraction has 22199 states and 25980 transitions. [2018-07-24 14:58:24,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:58:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 22199 states and 25980 transitions. [2018-07-24 14:58:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2018-07-24 14:58:24,704 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:24,705 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2018-07-24 14:58:24,705 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 14:58:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2066293853, now seen corresponding path program 1 times [2018-07-24 14:58:24,706 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:24,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:24,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:24,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:24,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:26,023 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:26,023 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 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 14:58:26,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:26,038 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:26,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:26,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:28,149 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:28,149 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 14:58:28,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:28,167 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:28,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:28,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:29,596 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:58:29,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 14:58:29,596 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:58:29,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:58:29,600 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:58:29,600 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:58:29,600 INFO L87 Difference]: Start difference. First operand 22199 states and 25980 transitions. Second operand 9 states. [2018-07-24 14:58:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:58:47,105 INFO L93 Difference]: Finished difference Result 61212 states and 76421 transitions. [2018-07-24 14:58:47,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 14:58:47,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 561 [2018-07-24 14:58:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:58:47,248 INFO L225 Difference]: With dead ends: 61212 [2018-07-24 14:58:47,248 INFO L226 Difference]: Without dead ends: 39722 [2018-07-24 14:58:47,356 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2267 GetRequests, 2241 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:58:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39722 states. [2018-07-24 14:58:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39722 to 39447. [2018-07-24 14:58:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39447 states. [2018-07-24 14:58:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39447 states to 39447 states and 46693 transitions. [2018-07-24 14:58:48,007 INFO L78 Accepts]: Start accepts. Automaton has 39447 states and 46693 transitions. Word has length 561 [2018-07-24 14:58:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:58:48,010 INFO L471 AbstractCegarLoop]: Abstraction has 39447 states and 46693 transitions. [2018-07-24 14:58:48,010 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:58:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 39447 states and 46693 transitions. [2018-07-24 14:58:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2018-07-24 14:58:48,060 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:58:48,061 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:58:48,061 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 14:58:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2088790405, now seen corresponding path program 1 times [2018-07-24 14:58:48,062 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:58:48,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:48,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:48,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:58:48,063 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:58:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 77 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:48,892 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:48,892 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 14:58:48,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:48,899 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:49,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:50,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:51,135 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:58:51,135 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:58:51,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:58:51,151 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:58:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:58:51,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:58:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:51,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:58:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:58:52,362 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:58:52,362 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 16 [2018-07-24 14:58:52,363 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:58:52,364 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:58:52,364 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:58:52,365 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:58:52,365 INFO L87 Difference]: Start difference. First operand 39447 states and 46693 transitions. Second operand 13 states. [2018-07-24 14:59:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:59:06,331 INFO L93 Difference]: Finished difference Result 111450 states and 141627 transitions. [2018-07-24 14:59:06,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-24 14:59:06,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 573 [2018-07-24 14:59:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:59:07,096 INFO L225 Difference]: With dead ends: 111450 [2018-07-24 14:59:07,096 INFO L226 Difference]: Without dead ends: 69845 [2018-07-24 14:59:07,220 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2356 GetRequests, 2296 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=680, Invalid=1972, Unknown=0, NotChecked=0, Total=2652 [2018-07-24 14:59:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69845 states. [2018-07-24 14:59:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69845 to 69085. [2018-07-24 14:59:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69085 states. [2018-07-24 14:59:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69085 states to 69085 states and 79202 transitions. [2018-07-24 14:59:08,433 INFO L78 Accepts]: Start accepts. Automaton has 69085 states and 79202 transitions. Word has length 573 [2018-07-24 14:59:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:59:08,434 INFO L471 AbstractCegarLoop]: Abstraction has 69085 states and 79202 transitions. [2018-07-24 14:59:08,435 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:59:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 69085 states and 79202 transitions. [2018-07-24 14:59:08,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2018-07-24 14:59:08,540 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:59:08,541 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:59:08,541 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 14:59:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1006437404, now seen corresponding path program 1 times [2018-07-24 14:59:08,542 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:59:08,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:08,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:08,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:08,545 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:59:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:59:09,546 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:59:09,546 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 14:59:09,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:09,555 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:59:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:09,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:59:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:59:10,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:59:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:59:11,141 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:59:11,141 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 14:59:11,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:11,158 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:59:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:11,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:59:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:59:11,887 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:59:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:59:12,417 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:59:12,418 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 14:59:12,419 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:59:12,420 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:59:12,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:59:12,421 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:59:12,421 INFO L87 Difference]: Start difference. First operand 69085 states and 79202 transitions. Second operand 9 states. [2018-07-24 14:59:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:59:40,640 INFO L93 Difference]: Finished difference Result 191071 states and 265112 transitions. [2018-07-24 14:59:40,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-24 14:59:40,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 686 [2018-07-24 14:59:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:59:41,357 INFO L225 Difference]: With dead ends: 191071 [2018-07-24 14:59:41,357 INFO L226 Difference]: Without dead ends: 108292 [2018-07-24 14:59:42,415 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2827 GetRequests, 2768 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=621, Invalid=2685, Unknown=0, NotChecked=0, Total=3306 [2018-07-24 14:59:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108292 states. [2018-07-24 14:59:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108292 to 104985. [2018-07-24 14:59:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104985 states. [2018-07-24 14:59:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104985 states to 104985 states and 128945 transitions. [2018-07-24 14:59:44,803 INFO L78 Accepts]: Start accepts. Automaton has 104985 states and 128945 transitions. Word has length 686 [2018-07-24 14:59:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:59:44,804 INFO L471 AbstractCegarLoop]: Abstraction has 104985 states and 128945 transitions. [2018-07-24 14:59:44,804 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:59:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 104985 states and 128945 transitions. [2018-07-24 14:59:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2018-07-24 14:59:44,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:59:44,935 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:59:44,935 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 14:59:44,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1942140925, now seen corresponding path program 1 times [2018-07-24 14:59:44,936 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:59:44,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:44,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:44,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:44,937 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:59:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2018-07-24 14:59:46,319 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:59:46,320 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:59:46,320 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:59:46,321 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:59:46,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:59:46,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:59:46,322 INFO L87 Difference]: Start difference. First operand 104985 states and 128945 transitions. Second operand 4 states. [2018-07-24 14:59:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:59:53,137 INFO L93 Difference]: Finished difference Result 199772 states and 240623 transitions. [2018-07-24 14:59:53,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:59:53,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 886 [2018-07-24 14:59:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:59:53,350 INFO L225 Difference]: With dead ends: 199772 [2018-07-24 14:59:53,351 INFO L226 Difference]: Without dead ends: 84451 [2018-07-24 14:59:53,597 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:59:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84451 states. [2018-07-24 14:59:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84451 to 83983. [2018-07-24 14:59:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83983 states. [2018-07-24 14:59:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83983 states to 83983 states and 92491 transitions. [2018-07-24 14:59:55,237 INFO L78 Accepts]: Start accepts. Automaton has 83983 states and 92491 transitions. Word has length 886 [2018-07-24 14:59:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:59:55,239 INFO L471 AbstractCegarLoop]: Abstraction has 83983 states and 92491 transitions. [2018-07-24 14:59:55,239 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:59:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 83983 states and 92491 transitions. [2018-07-24 14:59:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2018-07-24 14:59:55,292 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:59:55,293 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:59:55,293 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 14:59:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1858277664, now seen corresponding path program 1 times [2018-07-24 14:59:55,294 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:59:55,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:55,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:59:55,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:59:55,295 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:59:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:59:56,317 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:59:56,538 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 15:00:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 332 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:00:00,699 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:00,699 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 15:00:00,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:00,706 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:00:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:01,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:00:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-07-24 15:00:01,618 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:00:01,935 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 15:00:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 114 proven. 204 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-07-24 15:00:03,367 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:00:03,368 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [24, 5] total 29 [2018-07-24 15:00:03,368 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:00:03,369 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:00:03,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:00:03,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2018-07-24 15:00:03,370 INFO L87 Difference]: Start difference. First operand 83983 states and 92491 transitions. Second operand 5 states. [2018-07-24 15:00:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:00:11,704 INFO L93 Difference]: Finished difference Result 171084 states and 187942 transitions. [2018-07-24 15:00:11,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 15:00:11,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 973 [2018-07-24 15:00:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:00:11,888 INFO L225 Difference]: With dead ends: 171084 [2018-07-24 15:00:11,888 INFO L226 Difference]: Without dead ends: 87935 [2018-07-24 15:00:11,981 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1973 GetRequests, 1941 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 15:00:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87935 states. [2018-07-24 15:00:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87935 to 87870. [2018-07-24 15:00:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87870 states. [2018-07-24 15:00:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87870 states to 87870 states and 96467 transitions. [2018-07-24 15:00:12,908 INFO L78 Accepts]: Start accepts. Automaton has 87870 states and 96467 transitions. Word has length 973 [2018-07-24 15:00:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:00:12,909 INFO L471 AbstractCegarLoop]: Abstraction has 87870 states and 96467 transitions. [2018-07-24 15:00:12,909 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:00:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 87870 states and 96467 transitions. [2018-07-24 15:00:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1226 [2018-07-24 15:00:13,003 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:00:13,004 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:13,005 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 15:00:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 216300556, now seen corresponding path program 1 times [2018-07-24 15:00:13,005 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:00:13,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:13,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:13,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:13,006 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:00:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 443 proven. 560 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2018-07-24 15:00:15,455 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:15,455 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:00:15,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:15,462 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:00:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:15,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:00:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2018-07-24 15:00:16,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:00:16,881 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-07-24 15:00:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 190 proven. 456 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2018-07-24 15:00:18,149 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:00:18,150 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 5] total 18 [2018-07-24 15:00:18,150 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:00:18,151 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:00:18,151 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:00:18,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-07-24 15:00:18,151 INFO L87 Difference]: Start difference. First operand 87870 states and 96467 transitions. Second operand 5 states. [2018-07-24 15:00:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:00:25,422 INFO L93 Difference]: Finished difference Result 189268 states and 207233 transitions. [2018-07-24 15:00:25,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 15:00:25,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1225 [2018-07-24 15:00:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:00:25,856 INFO L225 Difference]: With dead ends: 189268 [2018-07-24 15:00:25,856 INFO L226 Difference]: Without dead ends: 101273 [2018-07-24 15:00:25,927 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2466 GetRequests, 2445 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-07-24 15:00:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101273 states. [2018-07-24 15:00:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101273 to 100501. [2018-07-24 15:00:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100501 states. [2018-07-24 15:00:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100501 states to 100501 states and 110212 transitions. [2018-07-24 15:00:27,077 INFO L78 Accepts]: Start accepts. Automaton has 100501 states and 110212 transitions. Word has length 1225 [2018-07-24 15:00:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:00:27,077 INFO L471 AbstractCegarLoop]: Abstraction has 100501 states and 110212 transitions. [2018-07-24 15:00:27,077 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:00:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 100501 states and 110212 transitions. [2018-07-24 15:00:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2018-07-24 15:00:27,170 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:00:27,171 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:27,171 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 15:00:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash 272687012, now seen corresponding path program 1 times [2018-07-24 15:00:27,171 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:00:27,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:27,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:27,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:27,173 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:00:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 68 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:00:32,178 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:32,178 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 15:00:32,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:32,186 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:00:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:32,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:00:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 729 proven. 0 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2018-07-24 15:00:33,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:00:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 152 proven. 679 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2018-07-24 15:00:35,349 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:00:35,349 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [23, 6] total 28 [2018-07-24 15:00:35,349 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:00:35,350 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:00:35,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:00:35,351 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2018-07-24 15:00:35,351 INFO L87 Difference]: Start difference. First operand 100501 states and 110212 transitions. Second operand 5 states. [2018-07-24 15:00:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:00:43,320 INFO L93 Difference]: Finished difference Result 200970 states and 220484 transitions. [2018-07-24 15:00:43,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 15:00:43,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1288 [2018-07-24 15:00:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:00:43,519 INFO L225 Difference]: With dead ends: 200970 [2018-07-24 15:00:43,520 INFO L226 Difference]: Without dead ends: 101191 [2018-07-24 15:00:43,628 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2609 GetRequests, 2571 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2018-07-24 15:00:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101191 states. [2018-07-24 15:00:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101191 to 100408. [2018-07-24 15:00:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100408 states. [2018-07-24 15:00:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100408 states to 100408 states and 109817 transitions. [2018-07-24 15:00:45,036 INFO L78 Accepts]: Start accepts. Automaton has 100408 states and 109817 transitions. Word has length 1288 [2018-07-24 15:00:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:00:45,036 INFO L471 AbstractCegarLoop]: Abstraction has 100408 states and 109817 transitions. [2018-07-24 15:00:45,037 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:00:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 100408 states and 109817 transitions. [2018-07-24 15:00:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1817 [2018-07-24 15:00:45,151 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:00:45,152 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:00:45,152 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 15:00:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash -400564465, now seen corresponding path program 1 times [2018-07-24 15:00:45,153 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:00:45,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:45,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:45,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:00:45,154 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:00:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:46,052 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 15:00:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 508 proven. 1802 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-07-24 15:00:49,612 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:49,612 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:00:49,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:49,619 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:00:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:00:50,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:00:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1416 proven. 2 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2018-07-24 15:00:53,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:00:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1416 proven. 2 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2018-07-24 15:00:59,945 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:00:59,945 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:00:59,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:00:59,962 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:01:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:01:01,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:01:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 2060 proven. 6 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2018-07-24 15:01:05,370 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:01:05,643 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-07-24 15:01:06,208 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2018-07-24 15:01:06,403 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2018-07-24 15:01:06,644 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown