java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:23:28,366 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:23:28,368 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:23:28,380 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:23:28,380 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:23:28,381 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:23:28,382 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:23:28,384 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:23:28,386 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:23:28,387 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:23:28,388 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:23:28,388 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:23:28,389 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:23:28,390 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:23:28,391 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:23:28,392 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:23:28,393 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:23:28,395 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:23:28,397 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:23:28,398 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:23:28,399 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:23:28,400 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:23:28,403 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:23:28,403 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:23:28,403 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:23:28,404 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:23:28,405 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:23:28,406 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:23:28,407 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:23:28,408 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:23:28,408 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:23:28,409 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:23:28,409 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:23:28,410 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:23:28,411 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:23:28,411 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:23:28,412 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 [2018-09-10 10:23:28,429 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:23:28,430 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:23:28,431 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:23:28,431 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:23:28,431 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:23:28,431 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:23:28,431 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:23:28,432 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:23:28,432 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:23:28,432 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:23:28,432 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:23:28,433 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:23:28,433 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:23:28,433 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:23:28,433 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:23:28,433 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:23:28,434 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:23:28,434 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:23:28,434 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:23:28,434 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:23:28,435 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:23:28,435 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:23:28,435 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:23:28,435 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:23:28,435 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:23:28,435 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:23:28,436 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:23:28,436 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:23:28,436 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:23:28,436 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:23:28,436 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:23:28,437 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:23:28,437 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:23:28,481 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:23:28,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:23:28,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:23:28,499 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:23:28,500 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:23:28,501 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-09-10 10:23:28,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4fe275e/20a4f9a1e02b4724bad4f0789b22e5e1/FLAG57b71bcfc [2018-09-10 10:23:29,260 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:23:29,261 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-09-10 10:23:29,289 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4fe275e/20a4f9a1e02b4724bad4f0789b22e5e1/FLAG57b71bcfc [2018-09-10 10:23:29,313 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4fe275e/20a4f9a1e02b4724bad4f0789b22e5e1 [2018-09-10 10:23:29,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:23:29,330 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:23:29,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:23:29,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:23:29,343 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:23:29,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:23:29" (1/1) ... [2018-09-10 10:23:29,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56add989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:29, skipping insertion in model container [2018-09-10 10:23:29,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:23:29" (1/1) ... [2018-09-10 10:23:29,608 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:23:30,200 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:23:30,221 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:23:30,572 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:23:30,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30 WrapperNode [2018-09-10 10:23:30,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:23:30,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:23:30,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:23:30,648 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:23:30,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:30,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:30,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:23:30,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:23:30,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:23:30,781 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:23:31,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:31,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:31,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:31,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:31,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:31,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:31,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (1/1) ... [2018-09-10 10:23:31,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:23:31,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:23:31,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:23:31,123 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:23:31,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (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 [2018-09-10 10:23:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:23:31,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:23:31,203 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 [2018-09-10 10:23:31,203 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 [2018-09-10 10:23:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:23:31,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:23:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:23:31,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:23:36,205 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:23:36,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:23:36 BoogieIcfgContainer [2018-09-10 10:23:36,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:23:36,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:23:36,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:23:36,211 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:23:36,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:23:29" (1/3) ... [2018-09-10 10:23:36,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1782f931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:23:36, skipping insertion in model container [2018-09-10 10:23:36,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:30" (2/3) ... [2018-09-10 10:23:36,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1782f931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:23:36, skipping insertion in model container [2018-09-10 10:23:36,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:23:36" (3/3) ... [2018-09-10 10:23:36,216 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label01_true-unreach-call.c [2018-09-10 10:23:36,227 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:23:36,238 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:23:36,311 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:23:36,312 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:23:36,312 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:23:36,312 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:23:36,312 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:23:36,312 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:23:36,312 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:23:36,313 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:23:36,313 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:23:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:23:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-10 10:23:36,390 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:36,394 INFO L376 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] [2018-09-10 10:23:36,396 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:36,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1178454204, now seen corresponding path program 1 times [2018-09-10 10:23:36,405 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:36,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:36,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:36,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:36,465 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:37,372 WARN L175 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:23:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:37,593 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:23:37,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:23:37,594 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:37,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:23:37,616 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:23:37,617 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:23:37,620 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-10 10:23:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:40,093 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-09-10 10:23:40,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:23:40,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2018-09-10 10:23:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:40,131 INFO L225 Difference]: With dead ends: 844 [2018-09-10 10:23:40,131 INFO L226 Difference]: Without dead ends: 530 [2018-09-10 10:23:40,139 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:23:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-09-10 10:23:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-09-10 10:23:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-09-10 10:23:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-09-10 10:23:40,233 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 193 [2018-09-10 10:23:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:40,234 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-09-10 10:23:40,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:23:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-09-10 10:23:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-10 10:23:40,243 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:40,243 INFO L376 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] [2018-09-10 10:23:40,244 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash 851918400, now seen corresponding path program 1 times [2018-09-10 10:23:40,245 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:40,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:40,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:40,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:40,246 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:40,776 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:23:40,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:23:40,777 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:40,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:23:40,779 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:23:40,781 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:23:40,781 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-09-10 10:23:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:42,958 INFO L93 Difference]: Finished difference Result 1477 states and 2511 transitions. [2018-09-10 10:23:42,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:23:42,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2018-09-10 10:23:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:42,966 INFO L225 Difference]: With dead ends: 1477 [2018-09-10 10:23:42,966 INFO L226 Difference]: Without dead ends: 958 [2018-09-10 10:23:42,969 INFO L604 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 [2018-09-10 10:23:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-09-10 10:23:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2018-09-10 10:23:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-09-10 10:23:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1546 transitions. [2018-09-10 10:23:43,016 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1546 transitions. Word has length 206 [2018-09-10 10:23:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:43,017 INFO L480 AbstractCegarLoop]: Abstraction has 943 states and 1546 transitions. [2018-09-10 10:23:43,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:23:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1546 transitions. [2018-09-10 10:23:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-09-10 10:23:43,023 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:43,024 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:23:43,024 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:43,024 INFO L82 PathProgramCache]: Analyzing trace with hash 584750157, now seen corresponding path program 1 times [2018-09-10 10:23:43,024 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:43,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:43,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:43,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:43,026 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:43,244 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-09-10 10:23:43,577 WARN L175 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:23:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:43,663 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:23:43,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-10 10:23:43,663 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:43,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:23:43,664 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:23:43,664 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:23:43,665 INFO L87 Difference]: Start difference. First operand 943 states and 1546 transitions. Second operand 7 states. [2018-09-10 10:23:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:48,853 INFO L93 Difference]: Finished difference Result 2923 states and 5188 transitions. [2018-09-10 10:23:48,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:23:48,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2018-09-10 10:23:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:48,884 INFO L225 Difference]: With dead ends: 2923 [2018-09-10 10:23:48,884 INFO L226 Difference]: Without dead ends: 1986 [2018-09-10 10:23:48,889 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:23:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2018-09-10 10:23:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1885. [2018-09-10 10:23:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2018-09-10 10:23:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3120 transitions. [2018-09-10 10:23:49,022 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3120 transitions. Word has length 211 [2018-09-10 10:23:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:49,024 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 3120 transitions. [2018-09-10 10:23:49,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:23:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3120 transitions. [2018-09-10 10:23:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-10 10:23:49,037 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:49,037 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:23:49,038 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1555578558, now seen corresponding path program 1 times [2018-09-10 10:23:49,038 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:49,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:49,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:49,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:49,041 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:23:49,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:23:49,422 INFO L197 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 [2018-09-10 10:23:49,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:49,432 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:23:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:49,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:23:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-10 10:23:50,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:23:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:23:51,127 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:23:51,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 10:23:51,127 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:51,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:23:51,129 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:23:51,129 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:23:51,129 INFO L87 Difference]: Start difference. First operand 1885 states and 3120 transitions. Second operand 5 states. [2018-09-10 10:23:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:54,612 INFO L93 Difference]: Finished difference Result 6151 states and 10655 transitions. [2018-09-10 10:23:54,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:23:54,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-09-10 10:23:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:54,647 INFO L225 Difference]: With dead ends: 6151 [2018-09-10 10:23:54,647 INFO L226 Difference]: Without dead ends: 4272 [2018-09-10 10:23:54,659 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 429 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:23:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2018-09-10 10:23:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3815. [2018-09-10 10:23:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3815 states. [2018-09-10 10:23:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 6101 transitions. [2018-09-10 10:23:54,795 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 6101 transitions. Word has length 217 [2018-09-10 10:23:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:54,796 INFO L480 AbstractCegarLoop]: Abstraction has 3815 states and 6101 transitions. [2018-09-10 10:23:54,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:23:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 6101 transitions. [2018-09-10 10:23:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-10 10:23:54,810 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:54,810 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-10 10:23:54,811 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash -223286947, now seen corresponding path program 1 times [2018-09-10 10:23:54,811 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:54,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:54,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:54,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:54,813 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:55,103 WARN L175 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:23:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:55,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:23:55,469 INFO L197 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 [2018-09-10 10:23:55,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:55,487 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:23:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:55,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:23:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:55,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:23:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:56,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:23:56,088 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:23:56,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:56,105 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:23:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:56,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:23:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-10 10:23:56,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:23:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-10 10:23:57,308 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-10 10:23:57,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 17 [2018-09-10 10:23:57,309 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:57,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:23:57,310 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:23:57,310 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:23:57,310 INFO L87 Difference]: Start difference. First operand 3815 states and 6101 transitions. Second operand 5 states. [2018-09-10 10:23:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:58,364 INFO L93 Difference]: Finished difference Result 11548 states and 19002 transitions. [2018-09-10 10:23:58,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:23:58,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2018-09-10 10:23:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:58,414 INFO L225 Difference]: With dead ends: 11548 [2018-09-10 10:23:58,414 INFO L226 Difference]: Without dead ends: 7739 [2018-09-10 10:23:58,429 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 860 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:23:58,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2018-09-10 10:23:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7657. [2018-09-10 10:23:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7657 states. [2018-09-10 10:23:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 12370 transitions. [2018-09-10 10:23:58,733 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 12370 transitions. Word has length 218 [2018-09-10 10:23:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:58,733 INFO L480 AbstractCegarLoop]: Abstraction has 7657 states and 12370 transitions. [2018-09-10 10:23:58,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:23:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 12370 transitions. [2018-09-10 10:23:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-10 10:23:58,760 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:58,760 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:23:58,760 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1292115596, now seen corresponding path program 1 times [2018-09-10 10:23:58,761 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:58,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:58,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:58,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:58,762 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:59,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:23:59,290 INFO L197 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 [2018-09-10 10:23:59,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:59,308 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:23:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:59,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:23:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-10 10:23:59,704 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-10 10:24:00,176 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:24:00,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-09-10 10:24:00,177 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:00,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:24:00,178 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:24:00,178 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:24:00,178 INFO L87 Difference]: Start difference. First operand 7657 states and 12370 transitions. Second operand 5 states. [2018-09-10 10:24:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:01,230 INFO L93 Difference]: Finished difference Result 23147 states and 38731 transitions. [2018-09-10 10:24:01,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:24:01,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2018-09-10 10:24:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:01,327 INFO L225 Difference]: With dead ends: 23147 [2018-09-10 10:24:01,328 INFO L226 Difference]: Without dead ends: 15496 [2018-09-10 10:24:01,354 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 446 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:24:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15496 states. [2018-09-10 10:24:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15496 to 15050. [2018-09-10 10:24:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15050 states. [2018-09-10 10:24:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15050 states to 15050 states and 24532 transitions. [2018-09-10 10:24:01,827 INFO L78 Accepts]: Start accepts. Automaton has 15050 states and 24532 transitions. Word has length 227 [2018-09-10 10:24:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:01,827 INFO L480 AbstractCegarLoop]: Abstraction has 15050 states and 24532 transitions. [2018-09-10 10:24:01,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:24:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 15050 states and 24532 transitions. [2018-09-10 10:24:01,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-10 10:24:01,875 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:01,876 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-10 10:24:01,876 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:01,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1815954702, now seen corresponding path program 1 times [2018-09-10 10:24:01,876 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:01,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:01,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:01,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:01,879 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:02,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:02,353 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:02,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:02,368 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:02,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:03,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:03,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:03,383 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:24:03,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:03,413 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:04,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:04,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:04,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:24:04,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:24:04,285 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:24:04,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:24:04,286 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:24:04,286 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:24:04,287 INFO L87 Difference]: Start difference. First operand 15050 states and 24532 transitions. Second operand 9 states. [2018-09-10 10:24:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:20,858 INFO L93 Difference]: Finished difference Result 103108 states and 225751 transitions. [2018-09-10 10:24:20,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-10 10:24:20,859 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 227 [2018-09-10 10:24:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:21,798 INFO L225 Difference]: With dead ends: 103108 [2018-09-10 10:24:21,799 INFO L226 Difference]: Without dead ends: 88064 [2018-09-10 10:24:21,935 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 923 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2018-09-10 10:24:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88064 states. [2018-09-10 10:24:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88064 to 84058. [2018-09-10 10:24:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84058 states. [2018-09-10 10:24:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84058 states to 84058 states and 126841 transitions. [2018-09-10 10:24:24,981 INFO L78 Accepts]: Start accepts. Automaton has 84058 states and 126841 transitions. Word has length 227 [2018-09-10 10:24:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:24,982 INFO L480 AbstractCegarLoop]: Abstraction has 84058 states and 126841 transitions. [2018-09-10 10:24:24,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:24:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 84058 states and 126841 transitions. [2018-09-10 10:24:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-10 10:24:25,145 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:25,145 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:25,146 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1679896798, now seen corresponding path program 1 times [2018-09-10 10:24:25,146 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:25,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:25,147 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:25,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:25,903 INFO L197 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 [2018-09-10 10:24:25,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:25,912 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:26,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-10 10:24:26,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-10 10:24:26,305 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:24:26,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:24:26,305 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:26,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:26,306 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:26,306 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:24:26,306 INFO L87 Difference]: Start difference. First operand 84058 states and 126841 transitions. Second operand 3 states. [2018-09-10 10:24:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:29,474 INFO L93 Difference]: Finished difference Result 236729 states and 356959 transitions. [2018-09-10 10:24:29,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:29,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-09-10 10:24:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:30,092 INFO L225 Difference]: With dead ends: 236729 [2018-09-10 10:24:30,093 INFO L226 Difference]: Without dead ends: 152697 [2018-09-10 10:24:30,364 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 464 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:24:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152697 states. [2018-09-10 10:24:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152697 to 152353. [2018-09-10 10:24:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152353 states. [2018-09-10 10:24:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152353 states to 152353 states and 217242 transitions. [2018-09-10 10:24:34,192 INFO L78 Accepts]: Start accepts. Automaton has 152353 states and 217242 transitions. Word has length 233 [2018-09-10 10:24:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:34,192 INFO L480 AbstractCegarLoop]: Abstraction has 152353 states and 217242 transitions. [2018-09-10 10:24:34,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 152353 states and 217242 transitions. [2018-09-10 10:24:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-09-10 10:24:34,348 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:34,348 INFO L376 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] [2018-09-10 10:24:34,348 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1949366092, now seen corresponding path program 1 times [2018-09-10 10:24:34,349 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:34,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:34,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:34,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:34,350 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:34,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:34,748 INFO L197 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 [2018-09-10 10:24:34,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:34,759 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:34,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:35,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:36,132 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:24:36,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 10:24:36,133 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:36,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:36,134 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:36,134 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:36,134 INFO L87 Difference]: Start difference. First operand 152353 states and 217242 transitions. Second operand 3 states. [2018-09-10 10:24:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:39,015 INFO L93 Difference]: Finished difference Result 276623 states and 389788 transitions. [2018-09-10 10:24:39,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:39,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2018-09-10 10:24:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:39,517 INFO L225 Difference]: With dead ends: 276623 [2018-09-10 10:24:39,518 INFO L226 Difference]: Without dead ends: 150242 [2018-09-10 10:24:39,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 477 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:39,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150242 states. [2018-09-10 10:24:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150242 to 149773. [2018-09-10 10:24:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149773 states. [2018-09-10 10:24:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149773 states to 149773 states and 209029 transitions. [2018-09-10 10:24:43,565 INFO L78 Accepts]: Start accepts. Automaton has 149773 states and 209029 transitions. Word has length 239 [2018-09-10 10:24:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:43,566 INFO L480 AbstractCegarLoop]: Abstraction has 149773 states and 209029 transitions. [2018-09-10 10:24:43,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 149773 states and 209029 transitions. [2018-09-10 10:24:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-09-10 10:24:43,688 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:43,689 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:43,689 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1873001038, now seen corresponding path program 1 times [2018-09-10 10:24:43,689 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:43,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:43,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:43,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:43,690 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:44,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:44,160 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:44,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:44,169 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:44,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:45,316 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:24:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:45,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:45,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:45,822 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:24:45,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:45,842 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:46,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:46,924 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2018-09-10 10:24:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:47,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:47,278 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-09-10 10:24:47,921 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-09-10 10:24:49,372 WARN L175 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2018-09-10 10:24:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:50,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:24:50,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 10, 11] total 36 [2018-09-10 10:24:50,247 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:24:50,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 10:24:50,248 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 10:24:50,249 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2018-09-10 10:24:50,249 INFO L87 Difference]: Start difference. First operand 149773 states and 209029 transitions. Second operand 14 states. [2018-09-10 10:25:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:09,152 INFO L93 Difference]: Finished difference Result 555277 states and 834049 transitions. [2018-09-10 10:25:09,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-10 10:25:09,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 241 [2018-09-10 10:25:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:11,363 INFO L225 Difference]: With dead ends: 555277 [2018-09-10 10:25:11,363 INFO L226 Difference]: Without dead ends: 405723 [2018-09-10 10:25:11,724 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 939 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=472, Invalid=2720, Unknown=0, NotChecked=0, Total=3192 [2018-09-10 10:25:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405723 states. [2018-09-10 10:25:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405723 to 396119. [2018-09-10 10:25:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396119 states. [2018-09-10 10:25:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396119 states to 396119 states and 556056 transitions. [2018-09-10 10:25:27,378 INFO L78 Accepts]: Start accepts. Automaton has 396119 states and 556056 transitions. Word has length 241 [2018-09-10 10:25:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:25:27,378 INFO L480 AbstractCegarLoop]: Abstraction has 396119 states and 556056 transitions. [2018-09-10 10:25:27,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-10 10:25:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 396119 states and 556056 transitions. [2018-09-10 10:25:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-09-10 10:25:27,667 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:25:27,668 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 10:25:27,668 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:25:27,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2091140557, now seen corresponding path program 1 times [2018-09-10 10:25:27,668 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:25:27,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:27,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:27,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:27,670 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:25:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:27,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:27,967 INFO L197 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 [2018-09-10 10:25:27,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:27,977 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:28,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:28,319 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:28,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:28,468 INFO L197 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 [2018-09-10 10:25:28,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:28,493 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:29,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:29,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:30,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:25:30,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-10 10:25:30,509 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:25:30,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:25:30,510 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:25:30,510 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:25:30,511 INFO L87 Difference]: Start difference. First operand 396119 states and 556056 transitions. Second operand 9 states. [2018-09-10 10:25:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:53,543 INFO L93 Difference]: Finished difference Result 963139 states and 1554589 transitions. [2018-09-10 10:25:53,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-10 10:25:53,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2018-09-10 10:25:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:26:07,629 INFO L225 Difference]: With dead ends: 963139 [2018-09-10 10:26:07,630 INFO L226 Difference]: Without dead ends: 567457 [2018-09-10 10:26:08,387 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1195 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=1809, Unknown=0, NotChecked=0, Total=2256 [2018-09-10 10:26:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567457 states. [2018-09-10 10:26:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567457 to 535572. [2018-09-10 10:26:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535572 states. [2018-09-10 10:26:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535572 states to 535572 states and 674162 transitions. [2018-09-10 10:26:21,198 INFO L78 Accepts]: Start accepts. Automaton has 535572 states and 674162 transitions. Word has length 297 [2018-09-10 10:26:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:26:21,198 INFO L480 AbstractCegarLoop]: Abstraction has 535572 states and 674162 transitions. [2018-09-10 10:26:21,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:26:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 535572 states and 674162 transitions. [2018-09-10 10:26:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-09-10 10:26:21,414 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:26:21,414 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:26:21,414 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:26:21,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1210419489, now seen corresponding path program 1 times [2018-09-10 10:26:21,414 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:26:21,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:21,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:21,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:21,416 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:26:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:21,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:21,721 INFO L197 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 [2018-09-10 10:26:21,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:21,729 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:21,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:22,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:22,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:22,235 INFO L197 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 [2018-09-10 10:26:22,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:22,251 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:24,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 113 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:24,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:24,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:26:24,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 17 [2018-09-10 10:26:24,640 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:26:24,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:26:24,640 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:26:24,641 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:26:24,641 INFO L87 Difference]: Start difference. First operand 535572 states and 674162 transitions. Second operand 6 states. [2018-09-10 10:26:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:26:31,258 INFO L93 Difference]: Finished difference Result 830336 states and 1041084 transitions. [2018-09-10 10:26:31,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-10 10:26:31,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 313 [2018-09-10 10:26:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:26:32,103 INFO L225 Difference]: With dead ends: 830336 [2018-09-10 10:26:32,103 INFO L226 Difference]: Without dead ends: 296745 [2018-09-10 10:26:33,741 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1238 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:26:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296745 states. [2018-09-10 10:26:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296745 to 280817. [2018-09-10 10:26:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280817 states. [2018-09-10 10:26:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280817 states to 280817 states and 343965 transitions. [2018-09-10 10:26:39,286 INFO L78 Accepts]: Start accepts. Automaton has 280817 states and 343965 transitions. Word has length 313 [2018-09-10 10:26:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:26:39,286 INFO L480 AbstractCegarLoop]: Abstraction has 280817 states and 343965 transitions. [2018-09-10 10:26:39,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:26:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 280817 states and 343965 transitions. [2018-09-10 10:26:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-09-10 10:26:39,402 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:26:39,403 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:26:39,403 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:26:39,403 INFO L82 PathProgramCache]: Analyzing trace with hash -551964203, now seen corresponding path program 1 times [2018-09-10 10:26:39,403 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:26:39,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:39,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:39,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:39,404 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:26:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:39,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:39,857 INFO L197 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 [2018-09-10 10:26:39,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:39,864 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:40,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-10 10:26:40,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-10 10:26:40,439 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:26:40,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:26:40,440 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:26:40,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:26:40,440 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:26:40,441 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:26:40,441 INFO L87 Difference]: Start difference. First operand 280817 states and 343965 transitions. Second operand 3 states. [2018-09-10 10:26:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:26:48,364 INFO L93 Difference]: Finished difference Result 549146 states and 673633 transitions. [2018-09-10 10:26:48,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:26:48,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 360 [2018-09-10 10:26:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:26:49,091 INFO L225 Difference]: With dead ends: 549146 [2018-09-10 10:26:49,092 INFO L226 Difference]: Without dead ends: 272818 [2018-09-10 10:26:49,459 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 718 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:26:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272818 states. Received shutdown request... [2018-09-10 10:26:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272818 to 269423. [2018-09-10 10:26:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269423 states. [2018-09-10 10:26:54,392 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:26:54,396 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:26:54,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:26:54 BoogieIcfgContainer [2018-09-10 10:26:54,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:26:54,398 INFO L168 Benchmark]: Toolchain (without parser) took 205071.11 ms. Allocated memory was 1.5 GB in the beginning and 5.4 GB in the end (delta: 3.9 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. [2018-09-10 10:26:54,399 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:26:54,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1315.37 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-09-10 10:26:54,400 INFO L168 Benchmark]: Boogie Procedure Inliner took 132.59 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. [2018-09-10 10:26:54,401 INFO L168 Benchmark]: Boogie Preprocessor took 341.55 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 741.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -863.2 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-10 10:26:54,402 INFO L168 Benchmark]: RCFGBuilder took 5083.65 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 305.9 MB). Peak memory consumption was 305.9 MB. Max. memory is 7.1 GB. [2018-09-10 10:26:54,402 INFO L168 Benchmark]: TraceAbstraction took 198189.61 ms. Allocated memory was 2.2 GB in the beginning and 5.4 GB in the end (delta: 3.2 GB). Free memory was 1.8 GB in the beginning and 3.4 GB in the end (delta: -1.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-10 10:26:54,407 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1315.37 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 132.59 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 341.55 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 741.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -863.2 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5083.65 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 305.9 MB). Peak memory consumption was 305.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 198189.61 ms. Allocated memory was 2.2 GB in the beginning and 5.4 GB in the end (delta: 3.2 GB). Free memory was 1.8 GB in the beginning and 3.4 GB in the end (delta: -1.5 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: 1593]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1593). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 198.0s OverallTime, 13 OverallIterations, 3 TraceHistogramMax, 118.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3154 SDtfs, 20332 SDslu, 4977 SDs, 0 SdLazy, 26296 SolverSat, 7109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7946 GetRequests, 7697 SyntacticMatches, 26 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 11.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=535572occurred in iteration=11, 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: 50.8s AutomataMinimizationTime, 13 MinimizatonAttempts, 63342 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.5s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 7050 NumberOfCodeBlocks, 7050 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 10875 ConstructedInterpolants, 0 QuantifiedInterpolants, 7021833 SizeOfPredicates, 52 NumberOfNonLiveVariables, 15974 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 43 InterpolantComputations, 14 PerfectInterpolantSequences, 3012/3209 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_label01_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-26-54-421.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label01_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-26-54-421.csv Completed graceful shutdown