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_label47_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:53:48,235 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:53:48,238 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:53:48,257 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:53:48,258 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:53:48,259 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:53:48,261 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:53:48,264 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:53:48,268 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:53:48,269 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:53:48,270 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:53:48,271 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:53:48,273 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:53:48,274 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:53:48,276 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:53:48,278 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:53:48,279 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:53:48,288 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:53:48,291 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:53:48,295 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:53:48,296 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:53:48,298 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:53:48,302 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:53:48,302 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:53:48,302 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:53:48,303 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:53:48,305 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:53:48,306 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:53:48,307 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:53:48,308 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:53:48,308 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:53:48,313 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:53:48,313 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:53:48,314 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:53:48,316 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:53:48,316 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:53:48,317 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 12:53:48,342 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:53:48,342 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:53:48,343 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:53:48,343 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:53:48,343 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:53:48,344 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:53:48,344 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:53:48,344 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:53:48,344 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:53:48,344 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:53:48,344 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:53:48,345 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:53:48,345 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:53:48,346 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:53:48,346 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:53:48,346 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:53:48,346 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:53:48,346 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:53:48,347 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:53:48,347 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:53:48,347 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:53:48,347 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:53:48,347 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:53:48,347 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:53:48,348 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:53:48,348 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:53:48,348 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:53:48,348 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:53:48,348 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:53:48,349 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:53:48,349 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:53:48,349 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:53:48,349 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:53:48,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:53:48,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:53:48,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:53:48,415 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:53:48,416 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:53:48,417 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label47_true-unreach-call.c [2018-07-24 12:53:48,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4c69c47/b62a63284715453e96c6f0bfb34e7546/FLAGf433ab325 [2018-07-24 12:53:49,107 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:53:49,109 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label47_true-unreach-call.c [2018-07-24 12:53:49,136 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4c69c47/b62a63284715453e96c6f0bfb34e7546/FLAGf433ab325 [2018-07-24 12:53:49,156 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4c69c47/b62a63284715453e96c6f0bfb34e7546 [2018-07-24 12:53:49,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:53:49,172 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:53:49,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:53:49,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:53:49,181 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:53:49,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:53:49" (1/1) ... [2018-07-24 12:53:49,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77928ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:49, skipping insertion in model container [2018-07-24 12:53:49,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:53:49" (1/1) ... [2018-07-24 12:53:49,460 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:53:49,998 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:53:50,018 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:53:50,600 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:53:50,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50 WrapperNode [2018-07-24 12:53:50,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:53:50,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:53:50,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:53:50,673 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:53:50,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:50,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:50,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:53:50,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:53:50,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:53:50,822 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:53:50,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:50,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:50,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:50,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:51,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:51,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:51,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... [2018-07-24 12:53:51,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:53:51,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:53:51,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:53:51,189 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:53:51,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:53:51,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:53:51,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:53:51,267 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 12:53:51,267 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 12:53:51,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:53:51,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:53:51,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:53:51,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:53:56,214 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:53:56,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:53:56 BoogieIcfgContainer [2018-07-24 12:53:56,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:53:56,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:53:56,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:53:56,220 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:53:56,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:53:49" (1/3) ... [2018-07-24 12:53:56,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d81514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:53:56, skipping insertion in model container [2018-07-24 12:53:56,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:53:50" (2/3) ... [2018-07-24 12:53:56,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d81514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:53:56, skipping insertion in model container [2018-07-24 12:53:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:53:56" (3/3) ... [2018-07-24 12:53:56,226 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label47_true-unreach-call.c [2018-07-24 12:53:56,238 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:53:56,251 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:53:56,326 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:53:56,327 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:53:56,327 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:53:56,327 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:53:56,327 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:53:56,328 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:53:56,328 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:53:56,328 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:53:56,328 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:53:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:53:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-07-24 12:53:56,388 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:56,389 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:56,389 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 12:53:56,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1857262073, now seen corresponding path program 1 times [2018-07-24 12:53:56,396 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:56,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:56,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:56,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:56,444 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:57,430 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 12:53:57,433 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:53:57,434 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:53:57,434 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:53:57,441 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:53:57,457 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:53:57,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:53:57,460 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:53:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:59,459 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-07-24 12:53:59,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:53:59,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2018-07-24 12:53:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:59,485 INFO L225 Difference]: With dead ends: 848 [2018-07-24 12:53:59,485 INFO L226 Difference]: Without dead ends: 534 [2018-07-24 12:53:59,493 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:53:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-07-24 12:53:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-07-24 12:53:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-07-24 12:53:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-07-24 12:53:59,589 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 204 [2018-07-24 12:53:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:59,591 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-07-24 12:53:59,591 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:53:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-07-24 12:53:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-07-24 12:53:59,601 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:59,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:59,602 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 12:53:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1296930173, now seen corresponding path program 1 times [2018-07-24 12:53:59,603 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:59,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:59,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:59,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:59,604 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:00,375 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 12:54:00,376 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:54:00,376 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:54:00,376 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:00,378 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:54:00,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:54:00,379 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:54:00,379 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-07-24 12:54:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:03,014 INFO L93 Difference]: Finished difference Result 1481 states and 2487 transitions. [2018-07-24 12:54:03,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:54:03,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2018-07-24 12:54:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:03,025 INFO L225 Difference]: With dead ends: 1481 [2018-07-24 12:54:03,025 INFO L226 Difference]: Without dead ends: 955 [2018-07-24 12:54:03,030 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 12:54:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2018-07-24 12:54:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 954. [2018-07-24 12:54:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2018-07-24 12:54:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1475 transitions. [2018-07-24 12:54:03,100 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1475 transitions. Word has length 217 [2018-07-24 12:54:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:03,101 INFO L471 AbstractCegarLoop]: Abstraction has 954 states and 1475 transitions. [2018-07-24 12:54:03,101 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:54:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1475 transitions. [2018-07-24 12:54:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-24 12:54:03,109 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:03,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:03,110 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 12:54:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1231516388, now seen corresponding path program 1 times [2018-07-24 12:54:03,111 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:03,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:03,113 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:03,422 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:54:03,625 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 12:54:03,625 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:03,626 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 12:54:03,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:03,644 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:03,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:04,171 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 12:54:04,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:05,097 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 12:54:05,120 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:05,120 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 12:54:05,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:05,141 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:05,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:06,154 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 12:54:06,154 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:06,416 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 12:54:06,423 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:54:06,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-07-24 12:54:06,423 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:54:06,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:54:06,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:54:06,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:54:06,428 INFO L87 Difference]: Start difference. First operand 954 states and 1475 transitions. Second operand 8 states. [2018-07-24 12:54:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:13,014 INFO L93 Difference]: Finished difference Result 3681 states and 6137 transitions. [2018-07-24 12:54:13,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:54:13,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 228 [2018-07-24 12:54:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:13,040 INFO L225 Difference]: With dead ends: 3681 [2018-07-24 12:54:13,040 INFO L226 Difference]: Without dead ends: 2733 [2018-07-24 12:54:13,050 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 905 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:54:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2018-07-24 12:54:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2666. [2018-07-24 12:54:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2666 states. [2018-07-24 12:54:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3830 transitions. [2018-07-24 12:54:13,174 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3830 transitions. Word has length 228 [2018-07-24 12:54:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:13,175 INFO L471 AbstractCegarLoop]: Abstraction has 2666 states and 3830 transitions. [2018-07-24 12:54:13,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:54:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3830 transitions. [2018-07-24 12:54:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-24 12:54:13,188 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:13,189 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:13,189 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 12:54:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 865325322, now seen corresponding path program 1 times [2018-07-24 12:54:13,190 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:13,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:13,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:13,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:13,191 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:13,471 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:54:13,626 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 12:54:13,627 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:54:13,627 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:54:13,627 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:13,627 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:54:13,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:54:13,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:54:13,628 INFO L87 Difference]: Start difference. First operand 2666 states and 3830 transitions. Second operand 6 states. [2018-07-24 12:54:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:15,636 INFO L93 Difference]: Finished difference Result 5654 states and 8323 transitions. [2018-07-24 12:54:15,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:54:15,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 239 [2018-07-24 12:54:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:15,656 INFO L225 Difference]: With dead ends: 5654 [2018-07-24 12:54:15,656 INFO L226 Difference]: Without dead ends: 2994 [2018-07-24 12:54:15,669 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:54:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2018-07-24 12:54:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2902. [2018-07-24 12:54:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2902 states. [2018-07-24 12:54:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 3896 transitions. [2018-07-24 12:54:15,755 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 3896 transitions. Word has length 239 [2018-07-24 12:54:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:15,755 INFO L471 AbstractCegarLoop]: Abstraction has 2902 states and 3896 transitions. [2018-07-24 12:54:15,755 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:54:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 3896 transitions. [2018-07-24 12:54:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-07-24 12:54:15,768 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:15,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:15,768 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 12:54:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 490104190, now seen corresponding path program 1 times [2018-07-24 12:54:15,769 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:15,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:15,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:15,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:15,770 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:16,011 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 12:54:16,012 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:16,012 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 12:54:16,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:16,021 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:16,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:16,910 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 12:54:16,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:17,166 WARN L169 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:54:17,312 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 12:54:17,334 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:17,334 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 12:54:17,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:17,353 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:17,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:18,096 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 12:54:18,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:18,393 WARN L169 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:54:18,604 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:54:18,696 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 12:54:18,699 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:54:18,699 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:54:18,699 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:54:18,700 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:54:18,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:54:18,702 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:54:18,702 INFO L87 Difference]: Start difference. First operand 2902 states and 3896 transitions. Second operand 9 states. [2018-07-24 12:54:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:23,460 INFO L93 Difference]: Finished difference Result 11557 states and 16483 transitions. [2018-07-24 12:54:23,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 12:54:23,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 253 [2018-07-24 12:54:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:23,600 INFO L225 Difference]: With dead ends: 11557 [2018-07-24 12:54:23,600 INFO L226 Difference]: Without dead ends: 8661 [2018-07-24 12:54:23,611 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 1005 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 12:54:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8661 states. [2018-07-24 12:54:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8661 to 8597. [2018-07-24 12:54:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8597 states. [2018-07-24 12:54:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8597 states to 8597 states and 11564 transitions. [2018-07-24 12:54:23,876 INFO L78 Accepts]: Start accepts. Automaton has 8597 states and 11564 transitions. Word has length 253 [2018-07-24 12:54:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:23,877 INFO L471 AbstractCegarLoop]: Abstraction has 8597 states and 11564 transitions. [2018-07-24 12:54:23,877 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:54:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 8597 states and 11564 transitions. [2018-07-24 12:54:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-07-24 12:54:23,916 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:23,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:23,916 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 12:54:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash 665990590, now seen corresponding path program 1 times [2018-07-24 12:54:23,917 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:23,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:23,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:23,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:23,919 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:24,505 WARN L169 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 12 [2018-07-24 12:54:24,702 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-07-24 12:54:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:24,901 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:24,901 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 12:54:24,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:24,918 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:25,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:25,652 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 12:54:25,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:25,858 WARN L169 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-07-24 12:54:25,993 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2018-07-24 12:54:26,307 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 12:54:26,329 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:54:26,329 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9] total 14 [2018-07-24 12:54:26,330 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:26,330 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:54:26,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:54:26,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:54:26,331 INFO L87 Difference]: Start difference. First operand 8597 states and 11564 transitions. Second operand 5 states. [2018-07-24 12:54:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:29,513 INFO L93 Difference]: Finished difference Result 26945 states and 38482 transitions. [2018-07-24 12:54:29,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:54:29,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 272 [2018-07-24 12:54:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:29,604 INFO L225 Difference]: With dead ends: 26945 [2018-07-24 12:54:29,604 INFO L226 Difference]: Without dead ends: 18354 [2018-07-24 12:54:29,661 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 540 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:54:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2018-07-24 12:54:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 17785. [2018-07-24 12:54:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17785 states. [2018-07-24 12:54:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17785 states to 17785 states and 22261 transitions. [2018-07-24 12:54:30,126 INFO L78 Accepts]: Start accepts. Automaton has 17785 states and 22261 transitions. Word has length 272 [2018-07-24 12:54:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:30,127 INFO L471 AbstractCegarLoop]: Abstraction has 17785 states and 22261 transitions. [2018-07-24 12:54:30,127 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:54:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 17785 states and 22261 transitions. [2018-07-24 12:54:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-07-24 12:54:30,192 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:30,193 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:30,193 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 12:54:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1493397055, now seen corresponding path program 1 times [2018-07-24 12:54:30,193 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:30,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:30,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:30,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:30,195 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:30,867 WARN L169 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:54:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:31,149 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:31,149 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:54:31,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:31,167 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:31,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:31,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:31,880 WARN L169 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-07-24 12:54:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:32,323 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:32,323 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:54:32,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:32,339 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:32,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:33,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:33,679 WARN L169 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 12:54:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:34,105 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:54:34,106 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 30 [2018-07-24 12:54:34,106 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:54:34,107 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 12:54:34,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 12:54:34,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2018-07-24 12:54:34,109 INFO L87 Difference]: Start difference. First operand 17785 states and 22261 transitions. Second operand 12 states. [2018-07-24 12:54:36,068 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-07-24 12:54:43,315 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:54:44,216 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 12:54:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:47,072 INFO L93 Difference]: Finished difference Result 79101 states and 103327 transitions. [2018-07-24 12:54:47,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-24 12:54:47,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2018-07-24 12:54:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:47,361 INFO L225 Difference]: With dead ends: 79101 [2018-07-24 12:54:47,361 INFO L226 Difference]: Without dead ends: 61322 [2018-07-24 12:54:47,440 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2938 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1476, Invalid=7644, Unknown=0, NotChecked=0, Total=9120 [2018-07-24 12:54:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61322 states. [2018-07-24 12:54:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61322 to 58902. [2018-07-24 12:54:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58902 states. [2018-07-24 12:54:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58902 states to 58902 states and 72788 transitions. [2018-07-24 12:54:49,092 INFO L78 Accepts]: Start accepts. Automaton has 58902 states and 72788 transitions. Word has length 284 [2018-07-24 12:54:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:49,093 INFO L471 AbstractCegarLoop]: Abstraction has 58902 states and 72788 transitions. [2018-07-24 12:54:49,093 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 12:54:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 58902 states and 72788 transitions. [2018-07-24 12:54:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-07-24 12:54:49,195 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:49,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:49,195 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 12:54:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash -595670805, now seen corresponding path program 1 times [2018-07-24 12:54:49,196 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:49,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:49,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:49,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:49,197 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:49,618 WARN L169 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:54:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:54:50,407 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:50,408 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 12:54:50,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:50,424 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:50,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 12:54:51,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 12:54:52,237 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:54:52,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2018-07-24 12:54:52,237 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:52,238 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:54:52,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:54:52,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:54:52,238 INFO L87 Difference]: Start difference. First operand 58902 states and 72788 transitions. Second operand 4 states. [2018-07-24 12:54:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:54,742 INFO L93 Difference]: Finished difference Result 145728 states and 183751 transitions. [2018-07-24 12:54:54,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:54:54,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 283 [2018-07-24 12:54:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:55,128 INFO L225 Difference]: With dead ends: 145728 [2018-07-24 12:54:55,128 INFO L226 Difference]: Without dead ends: 86832 [2018-07-24 12:54:55,291 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 561 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:54:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86832 states. [2018-07-24 12:54:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86832 to 86302. [2018-07-24 12:54:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86302 states. [2018-07-24 12:54:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86302 states to 86302 states and 107343 transitions. [2018-07-24 12:54:58,114 INFO L78 Accepts]: Start accepts. Automaton has 86302 states and 107343 transitions. Word has length 283 [2018-07-24 12:54:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:58,115 INFO L471 AbstractCegarLoop]: Abstraction has 86302 states and 107343 transitions. [2018-07-24 12:54:58,116 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:54:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 86302 states and 107343 transitions. [2018-07-24 12:54:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-07-24 12:54:58,218 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:58,219 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:58,219 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 12:54:58,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1065195107, now seen corresponding path program 1 times [2018-07-24 12:54:58,220 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:58,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:58,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:58,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:58,221 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:54:58,799 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:58,799 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:54:58,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:58,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:59,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 119 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:54:59,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:55:00,183 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:00,183 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:55:00,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:00,200 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:00,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 119 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:55:00,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:55:01,168 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:55:01,168 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-07-24 12:55:01,168 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:55:01,169 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:55:01,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:55:01,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:55:01,170 INFO L87 Difference]: Start difference. First operand 86302 states and 107343 transitions. Second operand 8 states. [2018-07-24 12:55:09,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:09,497 INFO L93 Difference]: Finished difference Result 244798 states and 327363 transitions. [2018-07-24 12:55:09,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-24 12:55:09,498 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 307 [2018-07-24 12:55:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:10,162 INFO L225 Difference]: With dead ends: 244798 [2018-07-24 12:55:10,162 INFO L226 Difference]: Without dead ends: 158502 [2018-07-24 12:55:10,428 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1237 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 12:55:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158502 states. [2018-07-24 12:55:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158502 to 151572. [2018-07-24 12:55:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151572 states. [2018-07-24 12:55:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151572 states to 151572 states and 179373 transitions. [2018-07-24 12:55:14,624 INFO L78 Accepts]: Start accepts. Automaton has 151572 states and 179373 transitions. Word has length 307 [2018-07-24 12:55:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:55:14,624 INFO L471 AbstractCegarLoop]: Abstraction has 151572 states and 179373 transitions. [2018-07-24 12:55:14,625 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:55:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 151572 states and 179373 transitions. [2018-07-24 12:55:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-07-24 12:55:14,753 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:55:14,754 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:14,754 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 12:55:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1043077258, now seen corresponding path program 1 times [2018-07-24 12:55:14,754 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:55:14,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:14,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:14,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:55:14,756 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:55:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:15,433 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:55:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 182 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-07-24 12:55:15,688 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:15,688 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 12:55:15,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:15,696 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:16,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 12:55:16,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 12:55:16,446 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:55:16,447 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:55:16,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:55:16,462 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:55:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:55:17,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:55:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 12:55:17,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:55:17,606 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:55:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 12:55:17,756 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:55:17,756 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:55:17,757 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:55:17,758 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:55:17,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:55:17,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:55:17,758 INFO L87 Difference]: Start difference. First operand 151572 states and 179373 transitions. Second operand 9 states. [2018-07-24 12:55:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:55:42,894 INFO L93 Difference]: Finished difference Result 895971 states and 1159273 transitions. [2018-07-24 12:55:42,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-24 12:55:42,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 368 [2018-07-24 12:55:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:55:55,594 INFO L225 Difference]: With dead ends: 895971 [2018-07-24 12:55:55,595 INFO L226 Difference]: Without dead ends: 745372 [2018-07-24 12:55:56,102 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1536 GetRequests, 1489 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=411, Invalid=1845, Unknown=0, NotChecked=0, Total=2256 [2018-07-24 12:55:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745372 states. [2018-07-24 12:56:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745372 to 726082. [2018-07-24 12:56:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726082 states. [2018-07-24 12:56:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726082 states to 726082 states and 860859 transitions. [2018-07-24 12:56:12,057 INFO L78 Accepts]: Start accepts. Automaton has 726082 states and 860859 transitions. Word has length 368 [2018-07-24 12:56:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:56:12,057 INFO L471 AbstractCegarLoop]: Abstraction has 726082 states and 860859 transitions. [2018-07-24 12:56:12,057 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:56:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 726082 states and 860859 transitions. [2018-07-24 12:56:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-07-24 12:56:12,425 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:56:12,426 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:56:12,426 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 12:56:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash -759512957, now seen corresponding path program 1 times [2018-07-24 12:56:12,426 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:56:12,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:12,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:12,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:56:12,428 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:56:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:56:12,764 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:56:12,764 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 12:56:12,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:56:12,773 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:56:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:56:13,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:56:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 12:56:13,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:56:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 12:56:15,063 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:56:15,064 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:56:15,064 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:56:15,064 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:56:15,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:56:15,065 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:56:15,065 INFO L87 Difference]: Start difference. First operand 726082 states and 860859 transitions. Second operand 3 states. [2018-07-24 12:56:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:56:42,995 INFO L93 Difference]: Finished difference Result 1428754 states and 1693158 transitions. [2018-07-24 12:56:42,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:56:42,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 375 [2018-07-24 12:56:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:56:45,652 INFO L225 Difference]: With dead ends: 1428754 [2018-07-24 12:56:45,652 INFO L226 Difference]: Without dead ends: 707289 [2018-07-24 12:56:46,902 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 748 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:56:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707289 states. [2018-07-24 12:56:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707289 to 689287. [2018-07-24 12:56:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689287 states. [2018-07-24 12:57:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689287 states to 689287 states and 804309 transitions. [2018-07-24 12:57:01,140 INFO L78 Accepts]: Start accepts. Automaton has 689287 states and 804309 transitions. Word has length 375 [2018-07-24 12:57:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:57:01,141 INFO L471 AbstractCegarLoop]: Abstraction has 689287 states and 804309 transitions. [2018-07-24 12:57:01,141 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:57:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 689287 states and 804309 transitions. [2018-07-24 12:57:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-07-24 12:57:03,350 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:57:03,350 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:57:03,350 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 12:57:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash 516670479, now seen corresponding path program 1 times [2018-07-24 12:57:03,351 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:57:03,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:57:03,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:57:03,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:57:03,352 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:57:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:57:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 212 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:57:03,906 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:57:03,906 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:57:03,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:57:03,915 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:57:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:57:04,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:57:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 212 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:57:04,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:57:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:57:04,871 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:57:04,871 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:57:04,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:57:04,888 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:57:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:57:05,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:57:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 212 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:57:06,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:57:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-07-24 12:57:06,778 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:57:06,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-07-24 12:57:06,779 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:57:06,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:57:06,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:57:06,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:57:06,780 INFO L87 Difference]: Start difference. First operand 689287 states and 804309 transitions. Second operand 8 states. Received shutdown request... [2018-07-24 12:57:12,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-24 12:57:12,640 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:57:12,646 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:57:12,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:57:12 BoogieIcfgContainer [2018-07-24 12:57:12,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:57:12,647 INFO L168 Benchmark]: Toolchain (without parser) took 203478.61 ms. Allocated memory was 1.5 GB in the beginning and 5.8 GB in the end (delta: 4.2 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -183.3 MB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. [2018-07-24 12:57:12,648 INFO L168 Benchmark]: CDTParser took 0.24 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 12:57:12,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1499.07 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 12:57:12,649 INFO L168 Benchmark]: Boogie Procedure Inliner took 148.31 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 12:57:12,650 INFO L168 Benchmark]: Boogie Preprocessor took 367.47 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.2 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. [2018-07-24 12:57:12,651 INFO L168 Benchmark]: RCFGBuilder took 5026.05 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 283.4 MB). Peak memory consumption was 283.4 MB. Max. memory is 7.1 GB. [2018-07-24 12:57:12,651 INFO L168 Benchmark]: TraceAbstraction took 196430.33 ms. Allocated memory was 2.4 GB in the beginning and 5.8 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 377.8 MB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. [2018-07-24 12:57:12,656 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 1499.07 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 148.31 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 367.47 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.2 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5026.05 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 283.4 MB). Peak memory consumption was 283.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 196430.33 ms. Allocated memory was 2.4 GB in the beginning and 5.8 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 377.8 MB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1626]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1626). Cancelled while BasicCegarLoop was constructing difference of abstraction (689287states) and interpolant automaton (currently 21 states, 8 states before enhancement), while ReachableStatesComputation was computing reachable states (148569 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 196.3s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 123.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2609 SDtfs, 22623 SDslu, 3400 SDs, 0 SdLazy, 28581 SolverSat, 6830 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9524 GetRequests, 9230 SyntacticMatches, 24 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4078 ImplicationChecksByTransitivity, 14.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=726082occurred in iteration=10, 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: 39.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 47967 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 21.1s InterpolantComputationTime, 8046 NumberOfCodeBlocks, 8046 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 12618 ConstructedInterpolants, 0 QuantifiedInterpolants, 11707974 SizeOfPredicates, 53 NumberOfNonLiveVariables, 18305 ConjunctsInSsa, 178 ConjunctsInUnsatCore, 42 InterpolantComputations, 8 PerfectInterpolantSequences, 5159/5660 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_label47_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-57-12-669.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label47_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-57-12-669.csv Completed graceful shutdown