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_label00_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:47:45,347 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:47:45,349 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:47:45,363 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:47:45,364 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:47:45,365 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:47:45,366 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:47:45,368 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:47:45,369 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:47:45,370 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:47:45,371 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:47:45,371 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:47:45,372 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:47:45,373 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:47:45,374 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:47:45,375 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:47:45,376 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:47:45,378 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:47:45,380 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:47:45,382 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:47:45,384 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:47:45,385 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:47:45,387 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:47:45,387 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:47:45,388 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:47:45,388 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:47:45,389 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:47:45,390 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:47:45,391 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:47:45,392 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:47:45,392 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:47:45,393 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:47:45,393 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:47:45,393 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:47:45,394 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:47:45,395 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:47:45,395 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 12:47:45,418 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:47:45,419 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:47:45,419 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:47:45,420 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:47:45,420 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:47:45,420 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:47:45,420 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:47:45,421 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:47:45,421 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:47:45,421 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:47:45,422 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:47:45,422 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:47:45,423 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:47:45,423 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:47:45,423 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:47:45,423 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:47:45,424 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:47:45,424 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:47:45,424 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:47:45,425 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:47:45,425 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:47:45,426 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:47:45,426 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:47:45,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:47:45,426 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:47:45,426 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:47:45,427 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:47:45,427 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:47:45,427 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:47:45,427 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:47:45,427 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:47:45,427 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:47:45,428 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:47:45,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:47:45,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:47:45,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:47:45,501 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:47:45,501 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:47:45,502 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label00_true-unreach-call.c [2018-07-24 12:47:45,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a03a5ae37/d05d34e3056048b7b9732b08d7791898/FLAG7d3fbb905 [2018-07-24 12:47:46,247 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:47:46,248 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label00_true-unreach-call.c [2018-07-24 12:47:46,275 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a03a5ae37/d05d34e3056048b7b9732b08d7791898/FLAG7d3fbb905 [2018-07-24 12:47:46,298 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a03a5ae37/d05d34e3056048b7b9732b08d7791898 [2018-07-24 12:47:46,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:47:46,313 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:47:46,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:47:46,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:47:46,323 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:47:46,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:47:46" (1/1) ... [2018-07-24 12:47:46,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73614751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:46, skipping insertion in model container [2018-07-24 12:47:46,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:47:46" (1/1) ... [2018-07-24 12:47:46,571 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:47:47,097 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:47:47,115 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:47:47,382 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:47:47,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47 WrapperNode [2018-07-24 12:47:47,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:47:47,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:47:47,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:47:47,454 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:47:47,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:47:47,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:47:47,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:47:47,638 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:47:47,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:47,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:48,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:48,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (1/1) ... [2018-07-24 12:47:48,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:47:48,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:47:48,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:47:48,047 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:47:48,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (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 12:47:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:47:48,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:47:48,122 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 12:47:48,122 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 12:47:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:47:48,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:47:48,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:47:48,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:47:52,946 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:47:52,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:47:52 BoogieIcfgContainer [2018-07-24 12:47:52,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:47:52,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:47:52,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:47:52,951 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:47:52,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:47:46" (1/3) ... [2018-07-24 12:47:52,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1a1829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:47:52, skipping insertion in model container [2018-07-24 12:47:52,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:47:47" (2/3) ... [2018-07-24 12:47:52,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1a1829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:47:52, skipping insertion in model container [2018-07-24 12:47:52,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:47:52" (3/3) ... [2018-07-24 12:47:52,956 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label00_true-unreach-call.c [2018-07-24 12:47:52,964 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:47:52,975 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:47:53,038 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:47:53,039 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:47:53,039 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:47:53,039 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:47:53,040 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:47:53,040 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:47:53,040 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:47:53,040 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:47:53,040 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:47:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:47:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-24 12:47:53,084 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:47:53,086 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] [2018-07-24 12:47:53,086 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 12:47:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash 612696124, now seen corresponding path program 1 times [2018-07-24 12:47:53,093 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:47:53,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:53,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:47:53,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:53,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:47:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:47:53,947 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:47:54,193 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 12:47:54,195 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:47:54,196 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:47:54,196 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:47:54,202 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:47:54,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:47:54,218 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:47:54,221 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:47:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:47:56,345 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-07-24 12:47:56,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:47:56,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2018-07-24 12:47:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:47:56,371 INFO L225 Difference]: With dead ends: 845 [2018-07-24 12:47:56,371 INFO L226 Difference]: Without dead ends: 531 [2018-07-24 12:47:56,378 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:47:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-07-24 12:47:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-07-24 12:47:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-07-24 12:47:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-07-24 12:47:56,469 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 199 [2018-07-24 12:47:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:47:56,472 INFO L471 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-07-24 12:47:56,472 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:47:56,474 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-07-24 12:47:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-24 12:47:56,490 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:47:56,490 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:47:56,492 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 12:47:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1798317323, now seen corresponding path program 1 times [2018-07-24 12:47:56,493 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:47:56,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:56,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:47:56,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:47:56,495 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:47:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:47:56,766 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:47:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:47:56,902 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:47:56,903 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:47:56,903 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:47:56,907 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:47:56,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:47:56,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:47:56,908 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-07-24 12:48:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:01,314 INFO L93 Difference]: Finished difference Result 1501 states and 2543 transitions. [2018-07-24 12:48:01,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:48:01,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 209 [2018-07-24 12:48:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:01,323 INFO L225 Difference]: With dead ends: 1501 [2018-07-24 12:48:01,323 INFO L226 Difference]: Without dead ends: 977 [2018-07-24 12:48:01,326 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:48:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2018-07-24 12:48:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 957. [2018-07-24 12:48:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2018-07-24 12:48:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1498 transitions. [2018-07-24 12:48:01,382 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1498 transitions. Word has length 209 [2018-07-24 12:48:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:01,383 INFO L471 AbstractCegarLoop]: Abstraction has 957 states and 1498 transitions. [2018-07-24 12:48:01,383 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:48:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1498 transitions. [2018-07-24 12:48:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-07-24 12:48:01,389 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:01,389 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] [2018-07-24 12:48:01,389 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 12:48:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2110773816, now seen corresponding path program 1 times [2018-07-24 12:48:01,390 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:01,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:01,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:01,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:01,391 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:01,718 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 12:48:01,718 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:01,718 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:48:01,719 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:01,721 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:01,721 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:01,721 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:01,722 INFO L87 Difference]: Start difference. First operand 957 states and 1498 transitions. Second operand 3 states. [2018-07-24 12:48:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:04,219 INFO L93 Difference]: Finished difference Result 2770 states and 4468 transitions. [2018-07-24 12:48:04,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:04,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2018-07-24 12:48:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:04,234 INFO L225 Difference]: With dead ends: 2770 [2018-07-24 12:48:04,234 INFO L226 Difference]: Without dead ends: 1819 [2018-07-24 12:48:04,239 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 12:48:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2018-07-24 12:48:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1803. [2018-07-24 12:48:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2018-07-24 12:48:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2764 transitions. [2018-07-24 12:48:04,314 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2764 transitions. Word has length 212 [2018-07-24 12:48:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:04,315 INFO L471 AbstractCegarLoop]: Abstraction has 1803 states and 2764 transitions. [2018-07-24 12:48:04,315 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2764 transitions. [2018-07-24 12:48:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-07-24 12:48:04,326 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:04,327 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:04,327 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 12:48:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 379225473, now seen corresponding path program 1 times [2018-07-24 12:48:04,329 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:04,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:04,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:04,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:04,330 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:04,844 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:04,844 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 12:48:04,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:04,866 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:05,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:05,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:06,039 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:06,039 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:48:06,039 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:06,040 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:06,041 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:06,041 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:06,041 INFO L87 Difference]: Start difference. First operand 1803 states and 2764 transitions. Second operand 3 states. [2018-07-24 12:48:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:09,040 INFO L93 Difference]: Finished difference Result 5324 states and 8388 transitions. [2018-07-24 12:48:09,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:09,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2018-07-24 12:48:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:09,073 INFO L225 Difference]: With dead ends: 5324 [2018-07-24 12:48:09,073 INFO L226 Difference]: Without dead ends: 3527 [2018-07-24 12:48:09,082 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 458 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2018-07-24 12:48:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 3524. [2018-07-24 12:48:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3524 states. [2018-07-24 12:48:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 5209 transitions. [2018-07-24 12:48:09,215 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 5209 transitions. Word has length 230 [2018-07-24 12:48:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:09,218 INFO L471 AbstractCegarLoop]: Abstraction has 3524 states and 5209 transitions. [2018-07-24 12:48:09,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 5209 transitions. [2018-07-24 12:48:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-24 12:48:09,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:09,234 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:09,234 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 12:48:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash -755285806, now seen corresponding path program 1 times [2018-07-24 12:48:09,235 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:09,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:09,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:09,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:09,237 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:09,683 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:09,683 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:09,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:09,690 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:09,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:09,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:10,566 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:10,567 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:48:10,567 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:10,568 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:10,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:10,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:10,569 INFO L87 Difference]: Start difference. First operand 3524 states and 5209 transitions. Second operand 3 states. [2018-07-24 12:48:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:12,262 INFO L93 Difference]: Finished difference Result 10464 states and 15875 transitions. [2018-07-24 12:48:12,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:12,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-07-24 12:48:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:12,314 INFO L225 Difference]: With dead ends: 10464 [2018-07-24 12:48:12,314 INFO L226 Difference]: Without dead ends: 6946 [2018-07-24 12:48:12,330 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6946 states. [2018-07-24 12:48:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6946 to 6937. [2018-07-24 12:48:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2018-07-24 12:48:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 10052 transitions. [2018-07-24 12:48:12,523 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 10052 transitions. Word has length 237 [2018-07-24 12:48:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:12,524 INFO L471 AbstractCegarLoop]: Abstraction has 6937 states and 10052 transitions. [2018-07-24 12:48:12,524 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 10052 transitions. [2018-07-24 12:48:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-07-24 12:48:12,555 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:12,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:12,556 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 12:48:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash 672504388, now seen corresponding path program 1 times [2018-07-24 12:48:12,557 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:12,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:12,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:12,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:12,559 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:13,206 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:13,207 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:48:13,207 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:13,207 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:48:13,208 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:48:13,208 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:48:13,208 INFO L87 Difference]: Start difference. First operand 6937 states and 10052 transitions. Second operand 4 states. [2018-07-24 12:48:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:15,972 INFO L93 Difference]: Finished difference Result 19118 states and 27950 transitions. [2018-07-24 12:48:15,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:48:15,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 245 [2018-07-24 12:48:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:16,043 INFO L225 Difference]: With dead ends: 19118 [2018-07-24 12:48:16,043 INFO L226 Difference]: Without dead ends: 12187 [2018-07-24 12:48:16,074 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:48:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12187 states. [2018-07-24 12:48:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12187 to 12169. [2018-07-24 12:48:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12169 states. [2018-07-24 12:48:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12169 states to 12169 states and 17360 transitions. [2018-07-24 12:48:16,359 INFO L78 Accepts]: Start accepts. Automaton has 12169 states and 17360 transitions. Word has length 245 [2018-07-24 12:48:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:16,360 INFO L471 AbstractCegarLoop]: Abstraction has 12169 states and 17360 transitions. [2018-07-24 12:48:16,360 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:48:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 12169 states and 17360 transitions. [2018-07-24 12:48:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-24 12:48:16,399 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:16,400 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:16,400 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 12:48:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash 439495155, now seen corresponding path program 1 times [2018-07-24 12:48:16,401 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:16,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:16,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:16,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:16,402 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:16,856 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:16,856 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 12:48:16,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:16,864 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:17,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-07-24 12:48:17,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:17,446 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:48:17,446 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 12:48:17,446 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:17,447 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:17,447 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:17,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:48:17,447 INFO L87 Difference]: Start difference. First operand 12169 states and 17360 transitions. Second operand 5 states. [2018-07-24 12:48:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:20,828 INFO L93 Difference]: Finished difference Result 33078 states and 49677 transitions. [2018-07-24 12:48:20,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:48:20,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2018-07-24 12:48:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:20,933 INFO L225 Difference]: With dead ends: 33078 [2018-07-24 12:48:20,933 INFO L226 Difference]: Without dead ends: 20915 [2018-07-24 12:48:21,001 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:48:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20915 states. [2018-07-24 12:48:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20915 to 20574. [2018-07-24 12:48:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20574 states. [2018-07-24 12:48:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20574 states to 20574 states and 28600 transitions. [2018-07-24 12:48:21,580 INFO L78 Accepts]: Start accepts. Automaton has 20574 states and 28600 transitions. Word has length 256 [2018-07-24 12:48:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:21,580 INFO L471 AbstractCegarLoop]: Abstraction has 20574 states and 28600 transitions. [2018-07-24 12:48:21,580 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20574 states and 28600 transitions. [2018-07-24 12:48:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-07-24 12:48:21,653 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:21,653 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:21,654 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 12:48:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash -204377464, now seen corresponding path program 1 times [2018-07-24 12:48:21,654 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:21,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:21,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:21,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:21,655 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:22,194 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:22,194 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:22,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:22,206 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:22,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:22,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:23,400 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:23,401 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:48:23,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:23,423 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:23,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:24,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:24,598 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:48:24,599 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 13 [2018-07-24 12:48:24,599 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:48:24,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:48:24,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:48:24,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:48:24,601 INFO L87 Difference]: Start difference. First operand 20574 states and 28600 transitions. Second operand 6 states. [2018-07-24 12:48:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:25,944 INFO L93 Difference]: Finished difference Result 39062 states and 53962 transitions. [2018-07-24 12:48:25,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 12:48:25,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 265 [2018-07-24 12:48:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:26,010 INFO L225 Difference]: With dead ends: 39062 [2018-07-24 12:48:26,011 INFO L226 Difference]: Without dead ends: 18494 [2018-07-24 12:48:26,046 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1051 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:48:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18494 states. [2018-07-24 12:48:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18494 to 18413. [2018-07-24 12:48:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18413 states. [2018-07-24 12:48:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18413 states to 18413 states and 24495 transitions. [2018-07-24 12:48:26,388 INFO L78 Accepts]: Start accepts. Automaton has 18413 states and 24495 transitions. Word has length 265 [2018-07-24 12:48:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:26,389 INFO L471 AbstractCegarLoop]: Abstraction has 18413 states and 24495 transitions. [2018-07-24 12:48:26,389 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:48:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 18413 states and 24495 transitions. [2018-07-24 12:48:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-07-24 12:48:26,435 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:26,436 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:48:26,436 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 12:48:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2102724034, now seen corresponding path program 1 times [2018-07-24 12:48:26,437 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:26,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:26,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:26,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:26,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:27,309 WARN L169 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 12 [2018-07-24 12:48:27,618 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2018-07-24 12:48:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:28,577 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:28,577 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 12:48:28,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:28,585 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:28,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:29,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:29,570 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:29,570 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [14] total 19 [2018-07-24 12:48:29,570 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:29,571 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:29,571 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:29,571 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:48:29,571 INFO L87 Difference]: Start difference. First operand 18413 states and 24495 transitions. Second operand 5 states. [2018-07-24 12:48:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:32,396 INFO L93 Difference]: Finished difference Result 47031 states and 64247 transitions. [2018-07-24 12:48:32,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:48:32,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2018-07-24 12:48:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:32,501 INFO L225 Difference]: With dead ends: 47031 [2018-07-24 12:48:32,501 INFO L226 Difference]: Without dead ends: 28624 [2018-07-24 12:48:32,537 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 635 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:48:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28624 states. [2018-07-24 12:48:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28624 to 28246. [2018-07-24 12:48:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28246 states. [2018-07-24 12:48:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28246 states to 28246 states and 37845 transitions. [2018-07-24 12:48:33,152 INFO L78 Accepts]: Start accepts. Automaton has 28246 states and 37845 transitions. Word has length 319 [2018-07-24 12:48:33,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:33,153 INFO L471 AbstractCegarLoop]: Abstraction has 28246 states and 37845 transitions. [2018-07-24 12:48:33,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 28246 states and 37845 transitions. [2018-07-24 12:48:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-07-24 12:48:33,209 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:33,209 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:48:33,210 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 12:48:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1750536031, now seen corresponding path program 1 times [2018-07-24 12:48:33,210 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:33,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:33,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:33,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:33,212 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:34,021 WARN L169 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 12 [2018-07-24 12:48:34,486 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-07-24 12:48:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 127 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:36,335 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:36,335 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:36,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:36,342 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:36,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:48:36,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:48:37,239 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:37,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [17] total 23 [2018-07-24 12:48:37,240 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:37,241 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:37,241 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:37,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:48:37,241 INFO L87 Difference]: Start difference. First operand 28246 states and 37845 transitions. Second operand 5 states. [2018-07-24 12:48:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:40,254 INFO L93 Difference]: Finished difference Result 73193 states and 100209 transitions. [2018-07-24 12:48:40,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:48:40,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2018-07-24 12:48:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:40,396 INFO L225 Difference]: With dead ends: 73193 [2018-07-24 12:48:40,397 INFO L226 Difference]: Without dead ends: 44953 [2018-07-24 12:48:40,450 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 657 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:48:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44953 states. [2018-07-24 12:48:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44953 to 44353. [2018-07-24 12:48:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44353 states. [2018-07-24 12:48:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44353 states to 44353 states and 58555 transitions. [2018-07-24 12:48:41,416 INFO L78 Accepts]: Start accepts. Automaton has 44353 states and 58555 transitions. Word has length 331 [2018-07-24 12:48:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:41,417 INFO L471 AbstractCegarLoop]: Abstraction has 44353 states and 58555 transitions. [2018-07-24 12:48:41,417 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 44353 states and 58555 transitions. [2018-07-24 12:48:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-07-24 12:48:41,508 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:41,508 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:48:41,508 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 12:48:41,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1910842938, now seen corresponding path program 1 times [2018-07-24 12:48:41,509 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:41,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:41,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:41,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:41,510 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 208 proven. 38 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-24 12:48:41,985 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:41,986 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 12:48:41,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:41,995 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:42,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 221 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-07-24 12:48:42,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 223 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-07-24 12:48:43,737 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:43,737 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:48:43,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:43,753 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:44,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 221 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-07-24 12:48:44,741 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 223 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-07-24 12:48:45,280 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:48:45,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 12:48:45,281 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:48:45,282 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:48:45,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:48:45,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:48:45,283 INFO L87 Difference]: Start difference. First operand 44353 states and 58555 transitions. Second operand 9 states. [2018-07-24 12:48:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:55,305 INFO L93 Difference]: Finished difference Result 115818 states and 179330 transitions. [2018-07-24 12:48:55,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-24 12:48:55,307 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 383 [2018-07-24 12:48:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:55,813 INFO L225 Difference]: With dead ends: 115818 [2018-07-24 12:48:55,813 INFO L226 Difference]: Without dead ends: 71471 [2018-07-24 12:48:55,947 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1611 GetRequests, 1555 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=520, Invalid=2342, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 12:48:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71471 states. [2018-07-24 12:48:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71471 to 66396. [2018-07-24 12:48:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66396 states. [2018-07-24 12:48:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66396 states to 66396 states and 83082 transitions. [2018-07-24 12:48:57,828 INFO L78 Accepts]: Start accepts. Automaton has 66396 states and 83082 transitions. Word has length 383 [2018-07-24 12:48:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:57,829 INFO L471 AbstractCegarLoop]: Abstraction has 66396 states and 83082 transitions. [2018-07-24 12:48:57,829 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:48:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 66396 states and 83082 transitions. [2018-07-24 12:48:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-07-24 12:48:57,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:57,968 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:48:57,968 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 12:48:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash -839481589, now seen corresponding path program 1 times [2018-07-24 12:48:57,969 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:57,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:57,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:57,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:57,970 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:58,704 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:48:58,879 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:48:59,302 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:49:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 350 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:01,957 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:01,958 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:01,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:01,966 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:02,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-07-24 12:49:02,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 237 proven. 140 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:49:03,225 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:49:03,226 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 6] total 25 [2018-07-24 12:49:03,226 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:49:03,226 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:49:03,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:49:03,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:49:03,227 INFO L87 Difference]: Start difference. First operand 66396 states and 83082 transitions. Second operand 5 states. [2018-07-24 12:49:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:05,989 INFO L93 Difference]: Finished difference Result 152929 states and 189796 transitions. [2018-07-24 12:49:05,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:49:05,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 437 [2018-07-24 12:49:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:06,222 INFO L225 Difference]: With dead ends: 152929 [2018-07-24 12:49:06,222 INFO L226 Difference]: Without dead ends: 86559 [2018-07-24 12:49:06,318 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 866 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2018-07-24 12:49:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86559 states. [2018-07-24 12:49:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86559 to 85718. [2018-07-24 12:49:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85718 states. [2018-07-24 12:49:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85718 states to 85718 states and 105442 transitions. [2018-07-24 12:49:08,392 INFO L78 Accepts]: Start accepts. Automaton has 85718 states and 105442 transitions. Word has length 437 [2018-07-24 12:49:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:08,393 INFO L471 AbstractCegarLoop]: Abstraction has 85718 states and 105442 transitions. [2018-07-24 12:49:08,393 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:49:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 85718 states and 105442 transitions. [2018-07-24 12:49:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-07-24 12:49:08,588 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:08,589 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:08,589 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash -826590503, now seen corresponding path program 1 times [2018-07-24 12:49:08,589 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:08,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:08,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:08,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:08,591 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 268 proven. 98 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-24 12:49:09,276 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:09,276 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 12:49:09,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:09,285 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:09,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:49:09,950 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:49:10,205 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:10,205 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 12:49:10,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:10,221 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:11,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:49:11,418 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:49:12,038 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:12,038 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 12:49:12,038 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:12,039 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:49:12,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:49:12,039 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:49:12,040 INFO L87 Difference]: Start difference. First operand 85718 states and 105442 transitions. Second operand 9 states. [2018-07-24 12:49:24,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:24,862 INFO L93 Difference]: Finished difference Result 197881 states and 278309 transitions. [2018-07-24 12:49:24,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-24 12:49:24,862 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 443 [2018-07-24 12:49:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:25,396 INFO L225 Difference]: With dead ends: 197881 [2018-07-24 12:49:25,396 INFO L226 Difference]: Without dead ends: 113848 [2018-07-24 12:49:25,533 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1847 GetRequests, 1792 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2018-07-24 12:49:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113848 states. [2018-07-24 12:49:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113848 to 105392. [2018-07-24 12:49:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105392 states. [2018-07-24 12:49:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105392 states to 105392 states and 125423 transitions. [2018-07-24 12:49:27,545 INFO L78 Accepts]: Start accepts. Automaton has 105392 states and 125423 transitions. Word has length 443 [2018-07-24 12:49:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:27,545 INFO L471 AbstractCegarLoop]: Abstraction has 105392 states and 125423 transitions. [2018-07-24 12:49:27,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:49:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 105392 states and 125423 transitions. [2018-07-24 12:49:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2018-07-24 12:49:27,675 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:27,676 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:27,676 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1559683821, now seen corresponding path program 1 times [2018-07-24 12:49:27,676 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:27,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:27,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:27,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:27,677 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 300 proven. 20 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-07-24 12:49:28,348 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:28,348 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 12:49:28,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:28,366 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:28,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-07-24 12:49:29,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 369 proven. 38 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2018-07-24 12:49:29,574 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:29,575 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:29,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:29,590 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:30,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-07-24 12:49:30,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 369 proven. 38 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2018-07-24 12:49:30,955 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:30,956 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 16 [2018-07-24 12:49:30,956 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:30,957 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:49:30,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:49:30,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:49:30,957 INFO L87 Difference]: Start difference. First operand 105392 states and 125423 transitions. Second operand 8 states. [2018-07-24 12:49:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:42,812 INFO L93 Difference]: Finished difference Result 356549 states and 432283 transitions. [2018-07-24 12:49:42,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-24 12:49:42,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 494 [2018-07-24 12:49:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:43,678 INFO L225 Difference]: With dead ends: 356549 [2018-07-24 12:49:43,678 INFO L226 Difference]: Without dead ends: 253131 [2018-07-24 12:49:43,896 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2027 GetRequests, 1988 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 12:49:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253131 states. [2018-07-24 12:49:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253131 to 249838. [2018-07-24 12:49:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249838 states. [2018-07-24 12:49:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249838 states to 249838 states and 287164 transitions. [2018-07-24 12:49:48,134 INFO L78 Accepts]: Start accepts. Automaton has 249838 states and 287164 transitions. Word has length 494 [2018-07-24 12:49:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:48,134 INFO L471 AbstractCegarLoop]: Abstraction has 249838 states and 287164 transitions. [2018-07-24 12:49:48,135 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:49:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 249838 states and 287164 transitions. [2018-07-24 12:49:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-07-24 12:49:48,520 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:48,520 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:49:48,520 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1127888220, now seen corresponding path program 1 times [2018-07-24 12:49:48,521 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:48,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:48,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:48,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:48,522 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 376 proven. 84 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-07-24 12:49:50,172 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:50,173 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:50,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:50,183 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:50,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 424 proven. 6 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-07-24 12:49:50,943 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 403 proven. 194 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2018-07-24 12:49:51,453 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:51,453 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:51,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:51,469 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:52,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 421 proven. 2 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-07-24 12:49:52,943 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 398 proven. 154 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2018-07-24 12:49:57,292 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:57,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 7, 5, 5] total 24 [2018-07-24 12:49:57,293 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:57,294 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:49:57,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:49:57,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:49:57,295 INFO L87 Difference]: Start difference. First operand 249838 states and 287164 transitions. Second operand 15 states. [2018-07-24 12:50:07,425 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-07-24 12:50:10,390 WARN L169 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-07-24 12:50:13,246 WARN L169 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-07-24 12:50:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:28,684 INFO L93 Difference]: Finished difference Result 704542 states and 923506 transitions. [2018-07-24 12:50:28,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-24 12:50:28,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 531 [2018-07-24 12:50:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:30,988 INFO L225 Difference]: With dead ends: 704542 [2018-07-24 12:50:30,988 INFO L226 Difference]: Without dead ends: 456815 [2018-07-24 12:50:31,414 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2315 GetRequests, 2194 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5202 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2312, Invalid=12450, Unknown=0, NotChecked=0, Total=14762 [2018-07-24 12:50:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456815 states. [2018-07-24 12:50:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456815 to 415606. [2018-07-24 12:50:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415606 states. [2018-07-24 12:50:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415606 states to 415606 states and 471270 transitions. [2018-07-24 12:50:42,462 INFO L78 Accepts]: Start accepts. Automaton has 415606 states and 471270 transitions. Word has length 531 [2018-07-24 12:50:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:42,463 INFO L471 AbstractCegarLoop]: Abstraction has 415606 states and 471270 transitions. [2018-07-24 12:50:42,463 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 12:50:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 415606 states and 471270 transitions. [2018-07-24 12:50:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2018-07-24 12:50:42,885 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:42,885 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:50:42,886 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:42,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1458501389, now seen corresponding path program 1 times [2018-07-24 12:50:42,886 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:42,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:42,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:42,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:42,887 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 380 proven. 197 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:50:43,649 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:43,649 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:43,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:43,658 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:44,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 577 proven. 2 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-07-24 12:50:45,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 577 proven. 2 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-07-24 12:50:45,563 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:45,563 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:50:45,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:45,579 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:46,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 577 proven. 2 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-07-24 12:50:46,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 577 proven. 2 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-07-24 12:50:47,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:50:47,145 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:50:47,145 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:50:47,146 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:50:47,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:50:47,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:50:47,147 INFO L87 Difference]: Start difference. First operand 415606 states and 471270 transitions. Second operand 9 states. Received shutdown request... [2018-07-24 12:51:21,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-24 12:51:21,994 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:51:22,000 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:51:22,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:51:22 BoogieIcfgContainer [2018-07-24 12:51:22,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:51:22,002 INFO L168 Benchmark]: Toolchain (without parser) took 215689.45 ms. Allocated memory was 1.5 GB in the beginning and 6.0 GB in the end (delta: 4.5 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-07-24 12:51:22,003 INFO L168 Benchmark]: CDTParser took 0.27 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 12:51:22,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1138.92 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 12:51:22,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 183.70 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 12:51:22,004 INFO L168 Benchmark]: Boogie Preprocessor took 408.07 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 815.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:22,005 INFO L168 Benchmark]: RCFGBuilder took 4900.73 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: 283.7 MB). Peak memory consumption was 283.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:22,006 INFO L168 Benchmark]: TraceAbstraction took 209053.27 ms. Allocated memory was 2.4 GB in the beginning and 6.0 GB in the end (delta: 3.7 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-07-24 12:51:22,010 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 1138.92 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 183.70 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 408.07 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 815.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4900.73 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: 283.7 MB). Peak memory consumption was 283.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209053.27 ms. Allocated memory was 2.4 GB in the beginning and 6.0 GB in the end (delta: 3.7 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1611]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1611). Cancelled while BasicCegarLoop was constructing difference of abstraction (415606states) and interpolant automaton (currently 37 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (1440665 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 208.9s OverallTime, 16 OverallIterations, 8 TraceHistogramMax, 137.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3307 SDtfs, 22717 SDslu, 4790 SDs, 0 SdLazy, 43989 SolverSat, 9552 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14896 GetRequests, 14454 SyntacticMatches, 25 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8110 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=415606occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 24.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 60341 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 29.5s InterpolantComputationTime, 12522 NumberOfCodeBlocks, 12522 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 19638 ConstructedInterpolants, 0 QuantifiedInterpolants, 29550050 SizeOfPredicates, 56 NumberOfNonLiveVariables, 26344 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 52 InterpolantComputations, 14 PerfectInterpolantSequences, 15097/16242 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_label00_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-51-22-022.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label00_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-51-22-022.csv Completed graceful shutdown