java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label48_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:54:23,174 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:54:23,176 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:54:23,189 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:54:23,189 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:54:23,190 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:54:23,192 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:54:23,194 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:54:23,195 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:54:23,196 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:54:23,197 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:54:23,198 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:54:23,199 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:54:23,200 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:54:23,201 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:54:23,202 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:54:23,205 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:54:23,207 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:54:23,215 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:54:23,217 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:54:23,218 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:54:23,220 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:54:23,222 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:54:23,223 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:54:23,223 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:54:23,224 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:54:23,225 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:54:23,226 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:54:23,227 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:54:23,228 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:54:23,228 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:54:23,229 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:54:23,229 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:54:23,229 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:54:23,230 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:54:23,231 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:54:23,232 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:54:23,247 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:54:23,247 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:54:23,248 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:54:23,248 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:54:23,249 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:54:23,249 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:54:23,249 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:54:23,249 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:54:23,249 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:54:23,250 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:54:23,250 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:54:23,250 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:54:23,251 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:54:23,251 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:54:23,251 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:54:23,251 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:54:23,251 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:54:23,252 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:54:23,252 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:54:23,252 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:54:23,252 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:54:23,252 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:54:23,253 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:54:23,253 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:54:23,253 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:54:23,253 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:54:23,253 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:54:23,254 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:54:23,254 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:54:23,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:54:23,254 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:54:23,254 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:54:23,254 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:54:23,316 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:54:23,330 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:54:23,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:54:23,337 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:54:23,338 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:54:23,339 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label48_true-unreach-call.c [2018-07-24 12:54:23,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ee30087/d32e2c373fb945d09acb92c44668590b/FLAGb405f98ff [2018-07-24 12:54:24,068 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:54:24,069 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label48_true-unreach-call.c [2018-07-24 12:54:24,093 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ee30087/d32e2c373fb945d09acb92c44668590b/FLAGb405f98ff [2018-07-24 12:54:24,109 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ee30087/d32e2c373fb945d09acb92c44668590b [2018-07-24 12:54:24,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:54:24,124 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:54:24,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:54:24,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:54:24,135 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:54:24,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:54:24" (1/1) ... [2018-07-24 12:54:24,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf6cf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:24, skipping insertion in model container [2018-07-24 12:54:24,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:54:24" (1/1) ... [2018-07-24 12:54:24,434 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:54:25,028 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:54:25,048 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:54:25,314 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:54:25,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25 WrapperNode [2018-07-24 12:54:25,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:54:25,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:54:25,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:54:25,404 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:54:25,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:54:25,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:54:25,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:54:25,602 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:54:25,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... [2018-07-24 12:54:25,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:54:25,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:54:25,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:54:25,987 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:54:25,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:54:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:54:26,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:54:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:54:26,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:54:26,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:54:26,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:54:26,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:54:26,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:54:31,277 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:54:31,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:54:31 BoogieIcfgContainer [2018-07-24 12:54:31,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:54:31,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:54:31,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:54:31,285 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:54:31,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:54:24" (1/3) ... [2018-07-24 12:54:31,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c3aeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:54:31, skipping insertion in model container [2018-07-24 12:54:31,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:54:25" (2/3) ... [2018-07-24 12:54:31,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c3aeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:54:31, skipping insertion in model container [2018-07-24 12:54:31,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:54:31" (3/3) ... [2018-07-24 12:54:31,290 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label48_true-unreach-call.c [2018-07-24 12:54:31,301 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:54:31,312 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:54:31,374 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:54:31,375 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:54:31,375 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:54:31,375 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:54:31,376 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:54:31,376 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:54:31,376 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:54:31,376 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:54:31,376 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:54:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:54:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-24 12:54:31,434 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:31,435 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:31,436 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1967383007, now seen corresponding path program 1 times [2018-07-24 12:54:31,445 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:31,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:31,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:31,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:31,504 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:32,513 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:54:32,514 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:54:32,514 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:32,522 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:54:32,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:54:32,539 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:54:32,542 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:54:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:34,755 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-07-24 12:54:34,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:54:34,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-07-24 12:54:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:34,781 INFO L225 Difference]: With dead ends: 848 [2018-07-24 12:54:34,781 INFO L226 Difference]: Without dead ends: 534 [2018-07-24 12:54:34,789 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:54:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-07-24 12:54:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-07-24 12:54:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-07-24 12:54:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-07-24 12:54:34,883 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 190 [2018-07-24 12:54:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:34,884 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-07-24 12:54:34,885 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:54:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-07-24 12:54:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-24 12:54:34,894 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:34,894 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:34,894 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash 805361829, now seen corresponding path program 1 times [2018-07-24 12:54:34,895 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:34,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:34,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:34,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:34,897 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:35,463 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:54:35,463 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:54:35,463 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:35,465 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:54:35,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:54:35,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:54:35,466 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-07-24 12:54:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:37,535 INFO L93 Difference]: Finished difference Result 1481 states and 2487 transitions. [2018-07-24 12:54:37,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:54:37,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-07-24 12:54:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:37,546 INFO L225 Difference]: With dead ends: 1481 [2018-07-24 12:54:37,546 INFO L226 Difference]: Without dead ends: 955 [2018-07-24 12:54:37,554 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:54:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2018-07-24 12:54:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 954. [2018-07-24 12:54:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2018-07-24 12:54:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1475 transitions. [2018-07-24 12:54:37,607 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1475 transitions. Word has length 203 [2018-07-24 12:54:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:37,608 INFO L471 AbstractCegarLoop]: Abstraction has 954 states and 1475 transitions. [2018-07-24 12:54:37,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:54:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1475 transitions. [2018-07-24 12:54:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-24 12:54:37,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:37,615 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:37,615 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash 444802636, now seen corresponding path program 1 times [2018-07-24 12:54:37,616 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:37,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:37,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:37,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:37,618 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:37,872 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:37,873 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:54:37,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:37,888 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:38,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:38,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:38,915 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:38,915 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:54:38,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:38,935 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:39,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:39,529 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:39,718 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:54:39,718 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-07-24 12:54:39,718 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:54:39,719 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:54:39,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:54:39,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:54:39,720 INFO L87 Difference]: Start difference. First operand 954 states and 1475 transitions. Second operand 8 states. [2018-07-24 12:54:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:45,934 INFO L93 Difference]: Finished difference Result 3681 states and 6137 transitions. [2018-07-24 12:54:45,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:54:45,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 214 [2018-07-24 12:54:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:45,966 INFO L225 Difference]: With dead ends: 3681 [2018-07-24 12:54:45,966 INFO L226 Difference]: Without dead ends: 2733 [2018-07-24 12:54:45,976 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 849 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:54:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2018-07-24 12:54:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2666. [2018-07-24 12:54:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2666 states. [2018-07-24 12:54:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3830 transitions. [2018-07-24 12:54:46,119 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3830 transitions. Word has length 214 [2018-07-24 12:54:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:46,119 INFO L471 AbstractCegarLoop]: Abstraction has 2666 states and 3830 transitions. [2018-07-24 12:54:46,120 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:54:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3830 transitions. [2018-07-24 12:54:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-24 12:54:46,134 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:46,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:46,134 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:46,135 INFO L82 PathProgramCache]: Analyzing trace with hash -891642126, now seen corresponding path program 1 times [2018-07-24 12:54:46,135 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:46,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:46,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:46,387 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:54:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:46,751 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:54:46,752 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:54:46,752 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:46,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:54:46,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:54:46,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:54:46,753 INFO L87 Difference]: Start difference. First operand 2666 states and 3830 transitions. Second operand 6 states. [2018-07-24 12:54:49,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:49,577 INFO L93 Difference]: Finished difference Result 5654 states and 8323 transitions. [2018-07-24 12:54:49,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:54:49,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 225 [2018-07-24 12:54:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:49,606 INFO L225 Difference]: With dead ends: 5654 [2018-07-24 12:54:49,606 INFO L226 Difference]: Without dead ends: 2994 [2018-07-24 12:54:49,620 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:54:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2018-07-24 12:54:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2902. [2018-07-24 12:54:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2902 states. [2018-07-24 12:54:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 3896 transitions. [2018-07-24 12:54:49,721 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 3896 transitions. Word has length 225 [2018-07-24 12:54:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:49,722 INFO L471 AbstractCegarLoop]: Abstraction has 2902 states and 3896 transitions. [2018-07-24 12:54:49,722 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:54:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 3896 transitions. [2018-07-24 12:54:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-24 12:54:49,734 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:49,735 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:49,735 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:49,735 INFO L82 PathProgramCache]: Analyzing trace with hash -764457370, now seen corresponding path program 1 times [2018-07-24 12:54:49,736 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:49,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:49,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:49,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:49,737 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 12:54:50,049 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:50,049 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:54:50,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:50,060 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:50,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:54:50,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:54:51,021 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:51,021 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 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:54:51,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:51,038 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:51,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:54:51,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:52,152 WARN L169 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:54:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:54:52,261 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:54:52,261 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:54:52,261 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:54:52,262 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:54:52,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:54:52,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:54:52,263 INFO L87 Difference]: Start difference. First operand 2902 states and 3896 transitions. Second operand 9 states. [2018-07-24 12:54:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:56,917 INFO L93 Difference]: Finished difference Result 11557 states and 16483 transitions. [2018-07-24 12:54:56,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 12:54:56,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 239 [2018-07-24 12:54:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:56,970 INFO L225 Difference]: With dead ends: 11557 [2018-07-24 12:54:56,970 INFO L226 Difference]: Without dead ends: 8661 [2018-07-24 12:54:56,986 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 949 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:54:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8661 states. [2018-07-24 12:54:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8661 to 8597. [2018-07-24 12:54:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8597 states. [2018-07-24 12:54:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8597 states to 8597 states and 11564 transitions. [2018-07-24 12:54:57,241 INFO L78 Accepts]: Start accepts. Automaton has 8597 states and 11564 transitions. Word has length 239 [2018-07-24 12:54:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:57,241 INFO L471 AbstractCegarLoop]: Abstraction has 8597 states and 11564 transitions. [2018-07-24 12:54:57,241 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:54:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 8597 states and 11564 transitions. [2018-07-24 12:54:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-24 12:54:57,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:57,273 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:57,273 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:57,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1296076454, now seen corresponding path program 1 times [2018-07-24 12:54:57,274 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:57,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:57,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:57,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:57,275 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:57,719 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:54:57,719 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:54:57,719 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:57,720 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:54:57,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:54:57,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:54:57,720 INFO L87 Difference]: Start difference. First operand 8597 states and 11564 transitions. Second operand 3 states. [2018-07-24 12:54:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:59,753 INFO L93 Difference]: Finished difference Result 25151 states and 34666 transitions. [2018-07-24 12:54:59,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:54:59,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 258 [2018-07-24 12:54:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:59,850 INFO L225 Difference]: With dead ends: 25151 [2018-07-24 12:54:59,850 INFO L226 Difference]: Without dead ends: 16560 [2018-07-24 12:54:59,896 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:54:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16560 states. [2018-07-24 12:55:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16560 to 16545. [2018-07-24 12:55:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16545 states. [2018-07-24 12:55:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16545 states to 16545 states and 22038 transitions. [2018-07-24 12:55:00,342 INFO L78 Accepts]: Start accepts. Automaton has 16545 states and 22038 transitions. Word has length 258 [2018-07-24 12:55:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:00,342 INFO L471 AbstractCegarLoop]: Abstraction has 16545 states and 22038 transitions. [2018-07-24 12:55:00,342 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:55:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 16545 states and 22038 transitions. [2018-07-24 12:55:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-07-24 12:55:00,397 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:00,398 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, 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] [2018-07-24 12:55:00,398 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash 151469818, now seen corresponding path program 1 times [2018-07-24 12:55:00,399 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:00,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:00,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:00,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:00,400 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:00,948 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:00,949 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:00,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:00,965 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:01,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:55:01,565 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:55:02,381 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:02,381 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 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:55:02,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:02,397 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:02,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:55:03,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:55:03,495 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:55:03,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-07-24 12:55:03,496 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:55:03,497 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:55:03,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:55:03,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:55:03,497 INFO L87 Difference]: Start difference. First operand 16545 states and 22038 transitions. Second operand 8 states. [2018-07-24 12:55:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:11,607 INFO L93 Difference]: Finished difference Result 53951 states and 83543 transitions. [2018-07-24 12:55:11,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-24 12:55:11,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 271 [2018-07-24 12:55:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:11,798 INFO L225 Difference]: With dead ends: 53951 [2018-07-24 12:55:11,799 INFO L226 Difference]: Without dead ends: 37412 [2018-07-24 12:55:11,884 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1092 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2018-07-24 12:55:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37412 states. [2018-07-24 12:55:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37412 to 35395. [2018-07-24 12:55:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35395 states. [2018-07-24 12:55:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35395 states to 35395 states and 43712 transitions. [2018-07-24 12:55:12,885 INFO L78 Accepts]: Start accepts. Automaton has 35395 states and 43712 transitions. Word has length 271 [2018-07-24 12:55:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:12,885 INFO L471 AbstractCegarLoop]: Abstraction has 35395 states and 43712 transitions. [2018-07-24 12:55:12,885 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:55:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 35395 states and 43712 transitions. [2018-07-24 12:55:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-07-24 12:55:12,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:12,962 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:12,962 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1393541414, now seen corresponding path program 1 times [2018-07-24 12:55:12,963 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:12,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:12,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:12,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:12,964 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 99 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:55:13,344 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:13,345 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:13,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:13,355 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:13,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-07-24 12:55:13,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 87 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:55:14,010 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:55:14,011 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-07-24 12:55:14,011 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:14,011 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:55:14,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:55:14,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:55:14,012 INFO L87 Difference]: Start difference. First operand 35395 states and 43712 transitions. Second operand 6 states. [2018-07-24 12:55:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:16,931 INFO L93 Difference]: Finished difference Result 69476 states and 87574 transitions. [2018-07-24 12:55:16,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:55:16,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 290 [2018-07-24 12:55:16,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:17,077 INFO L225 Difference]: With dead ends: 69476 [2018-07-24 12:55:17,078 INFO L226 Difference]: Without dead ends: 36667 [2018-07-24 12:55:17,152 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 572 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:55:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36667 states. [2018-07-24 12:55:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36667 to 35943. [2018-07-24 12:55:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35943 states. [2018-07-24 12:55:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35943 states to 35943 states and 44218 transitions. [2018-07-24 12:55:17,945 INFO L78 Accepts]: Start accepts. Automaton has 35943 states and 44218 transitions. Word has length 290 [2018-07-24 12:55:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:17,945 INFO L471 AbstractCegarLoop]: Abstraction has 35943 states and 44218 transitions. [2018-07-24 12:55:17,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:55:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 35943 states and 44218 transitions. [2018-07-24 12:55:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-07-24 12:55:17,991 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:17,992 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:17,992 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash -122089877, now seen corresponding path program 1 times [2018-07-24 12:55:17,992 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:17,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:17,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:17,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:17,993 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:55:18,536 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:55:18,536 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:55:18,537 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:18,537 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:55:18,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:55:18,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:55:18,540 INFO L87 Difference]: Start difference. First operand 35943 states and 44218 transitions. Second operand 4 states. [2018-07-24 12:55:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:21,556 INFO L93 Difference]: Finished difference Result 112943 states and 141029 transitions. [2018-07-24 12:55:21,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:55:21,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 289 [2018-07-24 12:55:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:21,800 INFO L225 Difference]: With dead ends: 112943 [2018-07-24 12:55:21,800 INFO L226 Difference]: Without dead ends: 77011 [2018-07-24 12:55:21,899 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 12:55:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77011 states. [2018-07-24 12:55:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77011 to 76976. [2018-07-24 12:55:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76976 states. [2018-07-24 12:55:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76976 states to 76976 states and 93783 transitions. [2018-07-24 12:55:23,742 INFO L78 Accepts]: Start accepts. Automaton has 76976 states and 93783 transitions. Word has length 289 [2018-07-24 12:55:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:23,742 INFO L471 AbstractCegarLoop]: Abstraction has 76976 states and 93783 transitions. [2018-07-24 12:55:23,742 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:55:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 76976 states and 93783 transitions. [2018-07-24 12:55:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-07-24 12:55:23,817 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:23,818 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:55:23,818 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:23,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1503980287, now seen corresponding path program 1 times [2018-07-24 12:55:23,818 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:23,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:23,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:23,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:23,819 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 153 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:55:24,286 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:24,286 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:24,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:24,298 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:24,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:55:24,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 153 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:55:24,764 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:24,764 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:55:24,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:24,780 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:25,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:55:25,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 158 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-07-24 12:55:25,841 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:55:25,841 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 7] total 17 [2018-07-24 12:55:25,842 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:55:25,842 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:55:25,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:55:25,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:55:25,845 INFO L87 Difference]: Start difference. First operand 76976 states and 93783 transitions. Second operand 7 states. [2018-07-24 12:55:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:31,690 INFO L93 Difference]: Finished difference Result 202062 states and 261185 transitions. [2018-07-24 12:55:31,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:55:31,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 310 [2018-07-24 12:55:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:32,242 INFO L225 Difference]: With dead ends: 202062 [2018-07-24 12:55:32,242 INFO L226 Difference]: Without dead ends: 127407 [2018-07-24 12:55:32,464 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1248 GetRequests, 1231 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:55:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127407 states. [2018-07-24 12:55:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127407 to 124068. [2018-07-24 12:55:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124068 states. [2018-07-24 12:55:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124068 states to 124068 states and 148699 transitions. [2018-07-24 12:55:35,636 INFO L78 Accepts]: Start accepts. Automaton has 124068 states and 148699 transitions. Word has length 310 [2018-07-24 12:55:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:35,636 INFO L471 AbstractCegarLoop]: Abstraction has 124068 states and 148699 transitions. [2018-07-24 12:55:35,636 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:55:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 124068 states and 148699 transitions. [2018-07-24 12:55:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-07-24 12:55:35,721 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:35,721 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:55:35,721 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1581945212, now seen corresponding path program 1 times [2018-07-24 12:55:35,722 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:35,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:35,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:35,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:35,723 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:36,038 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-07-24 12:55:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 131 proven. 50 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:55:36,322 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:36,322 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 12:55:36,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:36,331 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:36,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-07-24 12:55:36,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-07-24 12:55:36,847 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:55:36,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2018-07-24 12:55:36,848 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:36,848 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:55:36,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:55:36,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:55:36,849 INFO L87 Difference]: Start difference. First operand 124068 states and 148699 transitions. Second operand 3 states. [2018-07-24 12:55:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:39,679 INFO L93 Difference]: Finished difference Result 208058 states and 246922 transitions. [2018-07-24 12:55:39,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:55:39,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2018-07-24 12:55:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:39,924 INFO L225 Difference]: With dead ends: 208058 [2018-07-24 12:55:39,925 INFO L226 Difference]: Without dead ends: 124062 [2018-07-24 12:55:39,999 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:55:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124062 states. [2018-07-24 12:55:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124062 to 124062. [2018-07-24 12:55:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124062 states. [2018-07-24 12:55:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124062 states to 124062 states and 148673 transitions. [2018-07-24 12:55:41,583 INFO L78 Accepts]: Start accepts. Automaton has 124062 states and 148673 transitions. Word has length 334 [2018-07-24 12:55:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:41,583 INFO L471 AbstractCegarLoop]: Abstraction has 124062 states and 148673 transitions. [2018-07-24 12:55:41,583 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:55:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 124062 states and 148673 transitions. [2018-07-24 12:55:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-07-24 12:55:41,684 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:41,684 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2018-07-24 12:55:41,684 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1944392171, now seen corresponding path program 1 times [2018-07-24 12:55:41,685 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:41,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:41,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:41,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:41,686 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 148 proven. 65 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-07-24 12:55:42,456 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:42,456 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:42,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:42,463 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:42,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-07-24 12:55:42,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 148 proven. 65 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-07-24 12:55:43,830 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:55:43,831 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:55:43,831 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:43,831 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:55:43,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:55:43,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:55:43,832 INFO L87 Difference]: Start difference. First operand 124062 states and 148673 transitions. Second operand 5 states. [2018-07-24 12:55:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:47,859 INFO L93 Difference]: Finished difference Result 245964 states and 295370 transitions. [2018-07-24 12:55:47,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:55:47,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 354 [2018-07-24 12:55:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:48,147 INFO L225 Difference]: With dead ends: 245964 [2018-07-24 12:55:48,147 INFO L226 Difference]: Without dead ends: 124139 [2018-07-24 12:55:48,316 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 703 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:55:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124139 states. [2018-07-24 12:55:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124139 to 122561. [2018-07-24 12:55:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122561 states. [2018-07-24 12:55:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122561 states to 122561 states and 145043 transitions. [2018-07-24 12:55:50,652 INFO L78 Accepts]: Start accepts. Automaton has 122561 states and 145043 transitions. Word has length 354 [2018-07-24 12:55:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:50,653 INFO L471 AbstractCegarLoop]: Abstraction has 122561 states and 145043 transitions. [2018-07-24 12:55:50,653 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:55:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 122561 states and 145043 transitions. [2018-07-24 12:55:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-07-24 12:55:50,742 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:50,742 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:55:50,742 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:55:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1838979855, now seen corresponding path program 1 times [2018-07-24 12:55:50,743 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:50,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:50,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:50,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:50,744 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 228 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 12:55:51,189 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:51,189 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:55:51,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:51,197 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:51,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-07-24 12:55:51,678 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-07-24 12:55:52,019 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:55:52,019 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 12:55:52,020 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:55:52,020 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:55:52,020 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:55:52,021 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:55:52,021 INFO L87 Difference]: Start difference. First operand 122561 states and 145043 transitions. Second operand 5 states. [2018-07-24 12:55:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:54,983 INFO L93 Difference]: Finished difference Result 301667 states and 363548 transitions. [2018-07-24 12:55:54,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:55:54,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 362 [2018-07-24 12:55:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:55,458 INFO L225 Difference]: With dead ends: 301667 [2018-07-24 12:55:55,458 INFO L226 Difference]: Without dead ends: 194429 [2018-07-24 12:55:55,600 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 716 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:55:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194429 states. [2018-07-24 12:56:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194429 to 191901. [2018-07-24 12:56:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191901 states. [2018-07-24 12:56:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191901 states to 191901 states and 226586 transitions. [2018-07-24 12:56:02,531 INFO L78 Accepts]: Start accepts. Automaton has 191901 states and 226586 transitions. Word has length 362 [2018-07-24 12:56:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:02,532 INFO L471 AbstractCegarLoop]: Abstraction has 191901 states and 226586 transitions. [2018-07-24 12:56:02,532 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:56:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 191901 states and 226586 transitions. [2018-07-24 12:56:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-07-24 12:56:02,675 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:02,675 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:56:02,675 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash 377027142, now seen corresponding path program 1 times [2018-07-24 12:56:02,676 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:02,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:02,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:02,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:02,677 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 246 proven. 71 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:56:03,152 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:03,152 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:56:03,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:03,160 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:03,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 181 proven. 79 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:56:03,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 254 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:56:04,456 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:04,456 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:56:04,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:04,472 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:05,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 181 proven. 79 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:56:05,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 254 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:56:05,661 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:56:05,663 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4, 4, 4] total 18 [2018-07-24 12:56:05,663 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:56:05,664 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:56:05,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:56:05,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:56:05,664 INFO L87 Difference]: Start difference. First operand 191901 states and 226586 transitions. Second operand 13 states. [2018-07-24 12:56:13,279 WARN L169 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2018-07-24 12:56:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:22,452 INFO L93 Difference]: Finished difference Result 439655 states and 533789 transitions. [2018-07-24 12:56:22,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-24 12:56:22,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 383 [2018-07-24 12:56:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:23,088 INFO L225 Difference]: With dead ends: 439655 [2018-07-24 12:56:23,089 INFO L226 Difference]: Without dead ends: 250205 [2018-07-24 12:56:23,307 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1749 GetRequests, 1624 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5466 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2081, Invalid=12681, Unknown=0, NotChecked=0, Total=14762 [2018-07-24 12:56:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250205 states. [2018-07-24 12:56:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250205 to 241783. [2018-07-24 12:56:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241783 states. [2018-07-24 12:56:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241783 states to 241783 states and 290231 transitions. [2018-07-24 12:56:28,931 INFO L78 Accepts]: Start accepts. Automaton has 241783 states and 290231 transitions. Word has length 383 [2018-07-24 12:56:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:28,931 INFO L471 AbstractCegarLoop]: Abstraction has 241783 states and 290231 transitions. [2018-07-24 12:56:28,931 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:56:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 241783 states and 290231 transitions. [2018-07-24 12:56:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-07-24 12:56:29,346 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:29,347 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:56:29,347 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash -379556180, now seen corresponding path program 1 times [2018-07-24 12:56:29,348 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:29,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:29,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:29,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:29,350 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 205 proven. 105 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 12:56:30,027 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:30,027 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:56:30,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:30,037 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:30,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 205 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-07-24 12:56:30,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-07-24 12:56:30,907 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:56:30,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2018-07-24 12:56:30,908 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:56:30,908 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:56:30,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:56:30,909 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:56:30,909 INFO L87 Difference]: Start difference. First operand 241783 states and 290231 transitions. Second operand 5 states. [2018-07-24 12:56:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:38,234 INFO L93 Difference]: Finished difference Result 653480 states and 783795 transitions. [2018-07-24 12:56:38,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:56:38,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 406 [2018-07-24 12:56:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:39,470 INFO L225 Difference]: With dead ends: 653480 [2018-07-24 12:56:39,470 INFO L226 Difference]: Without dead ends: 414150 [2018-07-24 12:56:39,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 805 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:56:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414150 states. [2018-07-24 12:56:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414150 to 408703. [2018-07-24 12:56:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408703 states. [2018-07-24 12:56:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408703 states to 408703 states and 489811 transitions. [2018-07-24 12:56:55,258 INFO L78 Accepts]: Start accepts. Automaton has 408703 states and 489811 transitions. Word has length 406 [2018-07-24 12:56:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:55,258 INFO L471 AbstractCegarLoop]: Abstraction has 408703 states and 489811 transitions. [2018-07-24 12:56:55,259 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:56:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 408703 states and 489811 transitions. [2018-07-24 12:56:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2018-07-24 12:56:56,104 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:56,105 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:56:56,105 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:56:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1998451923, now seen corresponding path program 1 times [2018-07-24 12:56:56,105 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:56,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:56,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:56,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:56,106 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 473 proven. 135 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2018-07-24 12:56:56,946 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:56,946 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:56:56,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:56,953 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:57,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 644 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-07-24 12:56:58,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 498 proven. 150 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-07-24 12:56:58,738 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:58,738 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:56:58,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:58,754 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:59,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 644 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-07-24 12:56:59,989 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:57:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 498 proven. 150 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-07-24 12:57:00,290 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:57:00,291 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:57:00,291 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:57:00,292 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:57:00,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:57:00,292 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:57:00,292 INFO L87 Difference]: Start difference. First operand 408703 states and 489811 transitions. Second operand 9 states. [2018-07-24 12:57:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:57:34,462 INFO L93 Difference]: Finished difference Result 1602701 states and 2040045 transitions. [2018-07-24 12:57:34,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-24 12:57:34,462 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 568 [2018-07-24 12:57:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:57:38,850 INFO L225 Difference]: With dead ends: 1602701 [2018-07-24 12:57:38,850 INFO L226 Difference]: Without dead ends: 1191106 [2018-07-24 12:57:40,545 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2332 GetRequests, 2286 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=1597, Unknown=0, NotChecked=0, Total=1980 [2018-07-24 12:57:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191106 states. Received shutdown request... [2018-07-24 12:57:59,857 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:57:59,862 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:57:59,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:57:59 BoogieIcfgContainer [2018-07-24 12:57:59,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:57:59,864 INFO L168 Benchmark]: Toolchain (without parser) took 215740.51 ms. Allocated memory was 1.5 GB in the beginning and 7.2 GB in the end (delta: 5.7 GB). Free memory was 1.4 GB in the beginning and 4.8 GB in the end (delta: -3.4 GB). Peak memory consumption was 5.0 GB. Max. memory is 7.1 GB. [2018-07-24 12:57:59,865 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:57:59,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1277.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:57:59,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 198.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:57:59,866 INFO L168 Benchmark]: Boogie Preprocessor took 384.00 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -932.1 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-07-24 12:57:59,867 INFO L168 Benchmark]: RCFGBuilder took 5292.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 287.7 MB). Peak memory consumption was 287.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:57:59,868 INFO L168 Benchmark]: TraceAbstraction took 208582.90 ms. Allocated memory was 2.3 GB in the beginning and 7.2 GB in the end (delta: 4.9 GB). Free memory was 1.9 GB in the beginning and 4.8 GB in the end (delta: -2.8 GB). Peak memory consumption was 4.8 GB. Max. memory is 7.1 GB. [2018-07-24 12:57:59,876 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1277.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 198.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 384.00 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -932.1 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5292.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 287.7 MB). Peak memory consumption was 287.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208582.90 ms. Allocated memory was 2.3 GB in the beginning and 7.2 GB in the end (delta: 4.9 GB). Free memory was 1.9 GB in the beginning and 4.8 GB in the end (delta: -2.8 GB). Peak memory consumption was 4.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1584]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1584). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 208.4s OverallTime, 16 OverallIterations, 6 TraceHistogramMax, 119.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3841 SDtfs, 22474 SDslu, 5318 SDs, 0 SdLazy, 32817 SolverSat, 6453 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11861 GetRequests, 11509 SyntacticMatches, 35 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6571 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=408703occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 59.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 24331 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 17.1s InterpolantComputationTime, 10612 NumberOfCodeBlocks, 10612 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 16278 ConstructedInterpolants, 0 QuantifiedInterpolants, 13985829 SizeOfPredicates, 40 NumberOfNonLiveVariables, 22696 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 50 InterpolantComputations, 11 PerfectInterpolantSequences, 10511/11718 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-57-59-895.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-57-59-895.csv Completed graceful shutdown