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_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:28:55,387 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:28:55,389 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:28:55,409 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:28:55,409 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:28:55,410 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:28:55,411 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:28:55,413 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:28:55,414 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:28:55,415 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:28:55,416 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:28:55,416 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:28:55,417 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:28:55,418 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:28:55,419 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:28:55,420 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:28:55,421 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:28:55,423 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:28:55,425 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:28:55,426 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:28:55,427 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:28:55,429 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:28:55,431 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:28:55,431 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:28:55,432 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:28:55,432 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:28:55,433 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:28:55,434 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:28:55,435 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:28:55,436 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:28:55,437 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:28:55,437 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:28:55,438 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:28:55,438 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:28:55,439 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:28:55,440 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:28:55,440 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 10:28:55,459 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:28:55,459 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:28:55,460 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:28:55,460 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:28:55,460 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:28:55,461 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:28:55,461 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:28:55,461 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:28:55,461 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:28:55,461 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:28:55,462 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:28:55,462 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:28:55,462 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:28:55,463 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:28:55,463 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:28:55,463 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:28:55,463 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:28:55,464 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:28:55,464 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:28:55,465 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:28:55,465 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:28:55,465 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:28:55,465 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:28:55,466 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:28:55,466 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:28:55,466 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:28:55,466 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:28:55,466 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:28:55,467 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:28:55,467 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:28:55,467 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:28:55,467 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:28:55,467 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:28:55,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:28:55,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:28:55,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:28:55,538 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:28:55,538 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:28:55,539 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-09-10 10:28:55,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31729a74a/ebe5f5e029cf4699b6c8c7478a877228/FLAG08a7fbf96 [2018-09-10 10:28:56,269 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:28:56,271 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-09-10 10:28:56,300 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31729a74a/ebe5f5e029cf4699b6c8c7478a877228/FLAG08a7fbf96 [2018-09-10 10:28:56,321 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31729a74a/ebe5f5e029cf4699b6c8c7478a877228 [2018-09-10 10:28:56,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:28:56,341 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:28:56,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:28:56,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:28:56,354 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:28:56,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:28:56" (1/1) ... [2018-09-10 10:28:56,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bf522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:56, skipping insertion in model container [2018-09-10 10:28:56,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:28:56" (1/1) ... [2018-09-10 10:28:56,593 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:28:57,137 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:28:57,161 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:28:57,419 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:28:57,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57 WrapperNode [2018-09-10 10:28:57,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:28:57,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:28:57,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:28:57,489 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:28:57,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:57,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:57,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:28:57,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:28:57,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:28:57,654 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:28:57,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:57,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:57,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:57,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:58,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:58,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:58,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (1/1) ... [2018-09-10 10:28:58,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:28:58,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:28:58,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:28:58,081 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:28:58,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (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 10:28:58,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:28:58,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:28:58,166 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 10:28:58,166 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 10:28:58,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:28:58,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:28:58,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:28:58,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:29:03,472 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:29:03,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:29:03 BoogieIcfgContainer [2018-09-10 10:29:03,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:29:03,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:29:03,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:29:03,480 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:29:03,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:28:56" (1/3) ... [2018-09-10 10:29:03,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe6cf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:29:03, skipping insertion in model container [2018-09-10 10:29:03,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:28:57" (2/3) ... [2018-09-10 10:29:03,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe6cf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:29:03, skipping insertion in model container [2018-09-10 10:29:03,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:29:03" (3/3) ... [2018-09-10 10:29:03,485 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label44_true-unreach-call.c [2018-09-10 10:29:03,497 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:29:03,509 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:29:03,591 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:29:03,592 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:29:03,593 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:29:03,593 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:29:03,593 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:29:03,593 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:29:03,593 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:29:03,593 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:29:03,594 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:29:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:29:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-10 10:29:03,668 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:03,670 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] [2018-09-10 10:29:03,671 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 10:29:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1268744215, now seen corresponding path program 1 times [2018-09-10 10:29:03,681 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:03,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:03,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:03,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:03,747 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:04,968 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 10:29:04,970 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:29:04,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 10:29:04,970 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:04,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 10:29:04,992 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 10:29:04,992 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:29:04,994 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-10 10:29:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:08,350 INFO L93 Difference]: Finished difference Result 1074 states and 1924 transitions. [2018-09-10 10:29:08,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 10:29:08,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 184 [2018-09-10 10:29:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:08,382 INFO L225 Difference]: With dead ends: 1074 [2018-09-10 10:29:08,382 INFO L226 Difference]: Without dead ends: 756 [2018-09-10 10:29:08,396 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:29:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2018-09-10 10:29:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 520. [2018-09-10 10:29:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-10 10:29:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 919 transitions. [2018-09-10 10:29:08,494 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 919 transitions. Word has length 184 [2018-09-10 10:29:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:08,495 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 919 transitions. [2018-09-10 10:29:08,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 10:29:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 919 transitions. [2018-09-10 10:29:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-10 10:29:08,503 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:08,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:08,504 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 10:29:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash 928893740, now seen corresponding path program 1 times [2018-09-10 10:29:08,505 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:08,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:08,507 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:08,944 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:29:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:09,076 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:29:09,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:29:09,077 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:09,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:29:09,079 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:29:09,079 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:29:09,080 INFO L87 Difference]: Start difference. First operand 520 states and 919 transitions. Second operand 6 states. [2018-09-10 10:29:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:12,208 INFO L93 Difference]: Finished difference Result 1602 states and 2924 transitions. [2018-09-10 10:29:12,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:29:12,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2018-09-10 10:29:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:12,228 INFO L225 Difference]: With dead ends: 1602 [2018-09-10 10:29:12,228 INFO L226 Difference]: Without dead ends: 1088 [2018-09-10 10:29:12,233 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:29:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2018-09-10 10:29:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1067. [2018-09-10 10:29:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2018-09-10 10:29:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1766 transitions. [2018-09-10 10:29:12,331 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1766 transitions. Word has length 212 [2018-09-10 10:29:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:12,332 INFO L480 AbstractCegarLoop]: Abstraction has 1067 states and 1766 transitions. [2018-09-10 10:29:12,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:29:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1766 transitions. [2018-09-10 10:29:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-10 10:29:12,339 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:12,342 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:12,342 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 10:29:12,343 INFO L82 PathProgramCache]: Analyzing trace with hash 642508051, now seen corresponding path program 1 times [2018-09-10 10:29:12,343 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:12,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:12,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:12,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:12,345 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:12,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:12,602 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 10:29:12,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:12,612 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:12,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-10 10:29:13,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:13,984 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:29:13,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 10:29:13,985 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:13,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:29:13,986 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:29:13,986 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:29:13,987 INFO L87 Difference]: Start difference. First operand 1067 states and 1766 transitions. Second operand 5 states. [2018-09-10 10:29:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:17,764 INFO L93 Difference]: Finished difference Result 3370 states and 5695 transitions. [2018-09-10 10:29:17,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:29:17,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2018-09-10 10:29:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:17,789 INFO L225 Difference]: With dead ends: 3370 [2018-09-10 10:29:17,789 INFO L226 Difference]: Without dead ends: 2309 [2018-09-10 10:29:17,794 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 438 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:29:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2018-09-10 10:29:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2076. [2018-09-10 10:29:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2018-09-10 10:29:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3259 transitions. [2018-09-10 10:29:17,891 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3259 transitions. Word has length 222 [2018-09-10 10:29:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:17,892 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 3259 transitions. [2018-09-10 10:29:17,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:29:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3259 transitions. [2018-09-10 10:29:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-09-10 10:29:17,902 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:17,902 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:17,903 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 10:29:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash 479070896, now seen corresponding path program 1 times [2018-09-10 10:29:17,903 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:17,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:17,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:17,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:17,905 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:18,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:18,439 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 10:29:18,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:18,461 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:18,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:18,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:19,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:19,059 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 10:29:19,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:19,080 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:19,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:19,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:20,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:20,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-10 10:29:20,033 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:20,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:29:20,034 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:29:20,035 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:29:20,035 INFO L87 Difference]: Start difference. First operand 2076 states and 3259 transitions. Second operand 9 states. [2018-09-10 10:29:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:32,289 INFO L93 Difference]: Finished difference Result 11103 states and 27594 transitions. [2018-09-10 10:29:32,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-10 10:29:32,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 225 [2018-09-10 10:29:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:32,468 INFO L225 Difference]: With dead ends: 11103 [2018-09-10 10:29:32,468 INFO L226 Difference]: Without dead ends: 9033 [2018-09-10 10:29:32,534 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 929 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=558, Invalid=2522, Unknown=0, NotChecked=0, Total=3080 [2018-09-10 10:29:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2018-09-10 10:29:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 8007. [2018-09-10 10:29:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8007 states. [2018-09-10 10:29:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 11737 transitions. [2018-09-10 10:29:33,179 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 11737 transitions. Word has length 225 [2018-09-10 10:29:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:33,180 INFO L480 AbstractCegarLoop]: Abstraction has 8007 states and 11737 transitions. [2018-09-10 10:29:33,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:29:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 11737 transitions. [2018-09-10 10:29:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-09-10 10:29:33,211 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:33,211 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, 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] [2018-09-10 10:29:33,211 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 10:29:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1637770687, now seen corresponding path program 1 times [2018-09-10 10:29:33,212 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:33,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:33,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:33,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:33,213 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 49 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:33,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:33,579 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 10:29:33,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:33,592 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:33,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-10 10:29:34,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:34,338 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:29:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 49 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:29:34,419 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:29:34,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-10 10:29:34,419 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:34,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:29:34,420 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:29:34,420 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:29:34,421 INFO L87 Difference]: Start difference. First operand 8007 states and 11737 transitions. Second operand 5 states. [2018-09-10 10:29:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:40,377 INFO L93 Difference]: Finished difference Result 14761 states and 21675 transitions. [2018-09-10 10:29:40,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:29:40,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2018-09-10 10:29:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:40,417 INFO L225 Difference]: With dead ends: 14761 [2018-09-10 10:29:40,418 INFO L226 Difference]: Without dead ends: 8272 [2018-09-10 10:29:40,440 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 473 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:29:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8272 states. [2018-09-10 10:29:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8272 to 8142. [2018-09-10 10:29:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8142 states. [2018-09-10 10:29:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 11194 transitions. [2018-09-10 10:29:40,664 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 11194 transitions. Word has length 239 [2018-09-10 10:29:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:40,665 INFO L480 AbstractCegarLoop]: Abstraction has 8142 states and 11194 transitions. [2018-09-10 10:29:40,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:29:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 11194 transitions. [2018-09-10 10:29:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-10 10:29:40,694 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:40,694 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:40,694 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 10:29:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1192455608, now seen corresponding path program 1 times [2018-09-10 10:29:40,695 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:40,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:40,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:40,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:40,696 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:41,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:41,269 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) [2018-09-10 10:29:41,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:41,281 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:41,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-10 10:29:41,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-10 10:29:42,338 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:29:42,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:29:42,338 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:42,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:29:42,340 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:29:42,340 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:29:42,340 INFO L87 Difference]: Start difference. First operand 8142 states and 11194 transitions. Second operand 3 states. [2018-09-10 10:29:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:44,811 INFO L93 Difference]: Finished difference Result 22527 states and 31417 transitions. [2018-09-10 10:29:44,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:29:44,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2018-09-10 10:29:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:44,903 INFO L225 Difference]: With dead ends: 22527 [2018-09-10 10:29:44,903 INFO L226 Difference]: Without dead ends: 14406 [2018-09-10 10:29:44,931 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:29:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14406 states. [2018-09-10 10:29:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14406 to 14364. [2018-09-10 10:29:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14364 states. [2018-09-10 10:29:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14364 states to 14364 states and 19787 transitions. [2018-09-10 10:29:45,384 INFO L78 Accepts]: Start accepts. Automaton has 14364 states and 19787 transitions. Word has length 248 [2018-09-10 10:29:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:45,385 INFO L480 AbstractCegarLoop]: Abstraction has 14364 states and 19787 transitions. [2018-09-10 10:29:45,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:29:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 14364 states and 19787 transitions. [2018-09-10 10:29:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-10 10:29:45,434 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:45,434 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, 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] [2018-09-10 10:29:45,434 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 10:29:45,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1880356106, now seen corresponding path program 1 times [2018-09-10 10:29:45,435 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:45,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:45,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:45,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:45,436 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:45,773 WARN L175 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:29:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:46,200 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:29:46,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:29:46,200 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:46,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:29:46,201 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:29:46,201 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:29:46,202 INFO L87 Difference]: Start difference. First operand 14364 states and 19787 transitions. Second operand 6 states. [2018-09-10 10:29:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:48,286 INFO L93 Difference]: Finished difference Result 31464 states and 44573 transitions. [2018-09-10 10:29:48,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:29:48,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 248 [2018-09-10 10:29:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:48,347 INFO L225 Difference]: With dead ends: 31464 [2018-09-10 10:29:48,348 INFO L226 Difference]: Without dead ends: 17106 [2018-09-10 10:29:48,382 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:29:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17106 states. [2018-09-10 10:29:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17106 to 16940. [2018-09-10 10:29:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16940 states. [2018-09-10 10:29:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16940 states to 16940 states and 22407 transitions. [2018-09-10 10:29:48,797 INFO L78 Accepts]: Start accepts. Automaton has 16940 states and 22407 transitions. Word has length 248 [2018-09-10 10:29:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:48,797 INFO L480 AbstractCegarLoop]: Abstraction has 16940 states and 22407 transitions. [2018-09-10 10:29:48,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:29:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 16940 states and 22407 transitions. [2018-09-10 10:29:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-09-10 10:29:48,854 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:48,855 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:29:48,855 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 10:29:48,855 INFO L82 PathProgramCache]: Analyzing trace with hash 757313786, now seen corresponding path program 1 times [2018-09-10 10:29:48,855 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:48,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:48,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:48,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:48,857 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:49,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:49,420 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:29:49,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:49,693 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:49,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:50,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:50,304 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-10 10:29:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:50,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:50,499 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:50,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:50,515 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:51,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:51,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:51,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:51,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-10 10:29:51,393 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:51,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:29:51,394 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:29:51,395 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:29:51,395 INFO L87 Difference]: Start difference. First operand 16940 states and 22407 transitions. Second operand 7 states. [2018-09-10 10:29:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:54,801 INFO L93 Difference]: Finished difference Result 39213 states and 53712 transitions. [2018-09-10 10:29:54,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:29:54,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 269 [2018-09-10 10:29:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:54,902 INFO L225 Difference]: With dead ends: 39213 [2018-09-10 10:29:54,902 INFO L226 Difference]: Without dead ends: 22289 [2018-09-10 10:29:54,944 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-10 10:29:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22289 states. [2018-09-10 10:29:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22289 to 21917. [2018-09-10 10:29:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21917 states. [2018-09-10 10:29:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21917 states to 21917 states and 27980 transitions. [2018-09-10 10:29:55,524 INFO L78 Accepts]: Start accepts. Automaton has 21917 states and 27980 transitions. Word has length 269 [2018-09-10 10:29:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:55,524 INFO L480 AbstractCegarLoop]: Abstraction has 21917 states and 27980 transitions. [2018-09-10 10:29:55,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:29:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 21917 states and 27980 transitions. [2018-09-10 10:29:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-10 10:29:55,576 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:55,577 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:55,577 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 10:29:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2003599367, now seen corresponding path program 1 times [2018-09-10 10:29:55,578 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:55,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:55,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:55,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:55,580 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 97 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-10 10:29:56,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:56,202 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 10:29:56,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:56,507 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:56,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:29:56,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:29:57,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:57,074 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:29:57,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:57,093 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:57,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:29:57,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:29:57,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:57,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:29:57,952 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:57,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:29:57,953 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:29:57,953 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:29:57,953 INFO L87 Difference]: Start difference. First operand 21917 states and 27980 transitions. Second operand 9 states. [2018-09-10 10:30:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:02,545 INFO L93 Difference]: Finished difference Result 75278 states and 100887 transitions. [2018-09-10 10:30:02,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:30:02,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 278 [2018-09-10 10:30:02,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:02,740 INFO L225 Difference]: With dead ends: 75278 [2018-09-10 10:30:02,740 INFO L226 Difference]: Without dead ends: 54138 [2018-09-10 10:30:03,134 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 1105 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-10 10:30:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54138 states. [2018-09-10 10:30:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54138 to 53760. [2018-09-10 10:30:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53760 states. [2018-09-10 10:30:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53760 states to 53760 states and 68006 transitions. [2018-09-10 10:30:04,228 INFO L78 Accepts]: Start accepts. Automaton has 53760 states and 68006 transitions. Word has length 278 [2018-09-10 10:30:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:04,228 INFO L480 AbstractCegarLoop]: Abstraction has 53760 states and 68006 transitions. [2018-09-10 10:30:04,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:30:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 53760 states and 68006 transitions. [2018-09-10 10:30:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-10 10:30:04,321 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:04,321 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, 2, 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] [2018-09-10 10:30:04,322 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 10:30:04,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1166426043, now seen corresponding path program 1 times [2018-09-10 10:30:04,322 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:04,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:04,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:04,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:04,324 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:04,669 WARN L175 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:30:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 124 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:04,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:04,751 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:30:04,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:04,761 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:05,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-10 10:30:05,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 124 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:05,509 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:30:05,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-10 10:30:05,510 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:05,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:30:05,511 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:30:05,511 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:30:05,511 INFO L87 Difference]: Start difference. First operand 53760 states and 68006 transitions. Second operand 6 states. [2018-09-10 10:30:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:09,192 INFO L93 Difference]: Finished difference Result 91027 states and 115909 transitions. [2018-09-10 10:30:09,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:30:09,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 318 [2018-09-10 10:30:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:09,427 INFO L225 Difference]: With dead ends: 91027 [2018-09-10 10:30:09,427 INFO L226 Difference]: Without dead ends: 54797 [2018-09-10 10:30:09,507 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 628 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-09-10 10:30:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54797 states. [2018-09-10 10:30:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54797 to 53916. [2018-09-10 10:30:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53916 states. [2018-09-10 10:30:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53916 states to 53916 states and 67966 transitions. [2018-09-10 10:30:10,770 INFO L78 Accepts]: Start accepts. Automaton has 53916 states and 67966 transitions. Word has length 318 [2018-09-10 10:30:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:10,770 INFO L480 AbstractCegarLoop]: Abstraction has 53916 states and 67966 transitions. [2018-09-10 10:30:10,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:30:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 53916 states and 67966 transitions. [2018-09-10 10:30:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-09-10 10:30:10,860 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:10,860 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, 2, 2, 2, 2, 2, 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] [2018-09-10 10:30:10,861 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 10:30:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1453359054, now seen corresponding path program 1 times [2018-09-10 10:30:10,861 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:10,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:10,862 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:11,408 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:30:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:11,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:11,638 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 10:30:11,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:11,655 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:11,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-10 10:30:12,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:12,337 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:30:12,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 10:30:12,337 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:12,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:30:12,338 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:30:12,338 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:30:12,339 INFO L87 Difference]: Start difference. First operand 53916 states and 67966 transitions. Second operand 5 states. [2018-09-10 10:30:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:15,884 INFO L93 Difference]: Finished difference Result 139492 states and 178195 transitions. [2018-09-10 10:30:15,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:30:15,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2018-09-10 10:30:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:16,207 INFO L225 Difference]: With dead ends: 139492 [2018-09-10 10:30:16,207 INFO L226 Difference]: Without dead ends: 85815 [2018-09-10 10:30:16,336 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 635 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:30:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85815 states. [2018-09-10 10:30:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85815 to 83151. [2018-09-10 10:30:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83151 states. [2018-09-10 10:30:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83151 states to 83151 states and 104144 transitions. [2018-09-10 10:30:18,470 INFO L78 Accepts]: Start accepts. Automaton has 83151 states and 104144 transitions. Word has length 320 [2018-09-10 10:30:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:18,471 INFO L480 AbstractCegarLoop]: Abstraction has 83151 states and 104144 transitions. [2018-09-10 10:30:18,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:30:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 83151 states and 104144 transitions. [2018-09-10 10:30:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-10 10:30:18,599 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:18,599 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:30:18,600 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 10:30:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1060361831, now seen corresponding path program 1 times [2018-09-10 10:30:18,600 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:18,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:18,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:18,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:18,602 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:19,089 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:30:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:19,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:19,497 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:30:19,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:19,505 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:19,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-10 10:30:19,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-10 10:30:20,177 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:30:20,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-10 10:30:20,177 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:20,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:30:20,178 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:30:20,178 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:30:20,178 INFO L87 Difference]: Start difference. First operand 83151 states and 104144 transitions. Second operand 3 states. [2018-09-10 10:30:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:23,248 INFO L93 Difference]: Finished difference Result 158112 states and 198767 transitions. [2018-09-10 10:30:23,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:30:23,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2018-09-10 10:30:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:23,486 INFO L225 Difference]: With dead ends: 158112 [2018-09-10 10:30:23,486 INFO L226 Difference]: Without dead ends: 77083 [2018-09-10 10:30:23,635 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 678 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:30:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77083 states. [2018-09-10 10:30:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77083 to 71209. [2018-09-10 10:30:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71209 states. [2018-09-10 10:30:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71209 states to 71209 states and 87059 transitions. [2018-09-10 10:30:25,346 INFO L78 Accepts]: Start accepts. Automaton has 71209 states and 87059 transitions. Word has length 339 [2018-09-10 10:30:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:25,347 INFO L480 AbstractCegarLoop]: Abstraction has 71209 states and 87059 transitions. [2018-09-10 10:30:25,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:30:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 71209 states and 87059 transitions. [2018-09-10 10:30:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-09-10 10:30:25,443 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:25,443 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:30:25,443 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 10:30:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash -509630049, now seen corresponding path program 1 times [2018-09-10 10:30:25,444 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:25,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:25,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:25,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:25,445 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:26,165 WARN L175 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 9 [2018-09-10 10:30:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 153 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:26,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:26,597 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 10:30:26,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:26,605 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:26,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-10 10:30:27,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:27,498 WARN L175 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-10 10:30:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 153 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:29,104 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:30:29,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-10 10:30:29,104 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:29,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:30:29,105 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:30:29,105 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:30:29,105 INFO L87 Difference]: Start difference. First operand 71209 states and 87059 transitions. Second operand 5 states. [2018-09-10 10:30:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:32,675 INFO L93 Difference]: Finished difference Result 168412 states and 211282 transitions. [2018-09-10 10:30:32,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:30:32,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 343 [2018-09-10 10:30:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:32,985 INFO L225 Difference]: With dead ends: 168412 [2018-09-10 10:30:32,985 INFO L226 Difference]: Without dead ends: 98996 [2018-09-10 10:30:33,143 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:30:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98996 states. [2018-09-10 10:30:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98996 to 97421. [2018-09-10 10:30:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97421 states. [2018-09-10 10:30:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97421 states to 97421 states and 116662 transitions. [2018-09-10 10:30:36,085 INFO L78 Accepts]: Start accepts. Automaton has 97421 states and 116662 transitions. Word has length 343 [2018-09-10 10:30:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:36,085 INFO L480 AbstractCegarLoop]: Abstraction has 97421 states and 116662 transitions. [2018-09-10 10:30:36,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:30:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 97421 states and 116662 transitions. [2018-09-10 10:30:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-09-10 10:30:36,175 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:36,175 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:30:36,175 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:30:36,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1861984996, now seen corresponding path program 1 times [2018-09-10 10:30:36,176 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:36,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:36,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:36,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:36,177 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:30:36,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:36,624 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:30:36,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:36,633 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:36,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:30:36,998 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:30:37,123 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:30:37,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:30:37,123 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:37,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:30:37,124 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:30:37,124 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:30:37,124 INFO L87 Difference]: Start difference. First operand 97421 states and 116662 transitions. Second operand 3 states. [2018-09-10 10:30:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:39,851 INFO L93 Difference]: Finished difference Result 195056 states and 234632 transitions. [2018-09-10 10:30:39,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:30:39,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2018-09-10 10:30:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:40,115 INFO L225 Difference]: With dead ends: 195056 [2018-09-10 10:30:40,115 INFO L226 Difference]: Without dead ends: 99489 [2018-09-10 10:30:40,252 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:30:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99489 states. [2018-09-10 10:30:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99489 to 97867. [2018-09-10 10:30:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97867 states. [2018-09-10 10:30:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97867 states to 97867 states and 116049 transitions. [2018-09-10 10:30:42,476 INFO L78 Accepts]: Start accepts. Automaton has 97867 states and 116049 transitions. Word has length 349 [2018-09-10 10:30:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:42,477 INFO L480 AbstractCegarLoop]: Abstraction has 97867 states and 116049 transitions. [2018-09-10 10:30:42,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:30:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 97867 states and 116049 transitions. [2018-09-10 10:30:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-09-10 10:30:42,582 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:42,582 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:42,582 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:30:42,583 INFO L82 PathProgramCache]: Analyzing trace with hash 720759868, now seen corresponding path program 1 times [2018-09-10 10:30:42,583 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:42,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:42,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:42,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:42,584 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:42,915 WARN L175 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:30:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 168 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:43,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:43,775 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 10:30:43,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:43,784 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:44,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-10 10:30:44,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:44,589 WARN L175 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-10 10:30:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 168 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:44,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:44,983 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:30:45,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:45,003 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:45,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 10:30:46,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:46,850 WARN L175 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-10 10:30:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 172 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:30:47,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:30:47,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 6, 8] total 29 [2018-09-10 10:30:47,370 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:30:47,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 10:30:47,371 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 10:30:47,372 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2018-09-10 10:30:47,372 INFO L87 Difference]: Start difference. First operand 97867 states and 116049 transitions. Second operand 16 states. [2018-09-10 10:30:49,383 WARN L175 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-09-10 10:30:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:57,779 INFO L93 Difference]: Finished difference Result 175351 states and 224295 transitions. [2018-09-10 10:30:57,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-10 10:30:57,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 355 [2018-09-10 10:30:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:58,196 INFO L225 Difference]: With dead ends: 175351 [2018-09-10 10:30:58,196 INFO L226 Difference]: Without dead ends: 110016 [2018-09-10 10:30:58,321 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1430 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=961, Invalid=3595, Unknown=0, NotChecked=0, Total=4556 [2018-09-10 10:30:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110016 states. [2018-09-10 10:31:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110016 to 107097. [2018-09-10 10:31:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107097 states. [2018-09-10 10:31:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107097 states to 107097 states and 133084 transitions. [2018-09-10 10:31:04,588 INFO L78 Accepts]: Start accepts. Automaton has 107097 states and 133084 transitions. Word has length 355 [2018-09-10 10:31:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:31:04,589 INFO L480 AbstractCegarLoop]: Abstraction has 107097 states and 133084 transitions. [2018-09-10 10:31:04,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 10:31:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 107097 states and 133084 transitions. [2018-09-10 10:31:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-10 10:31:04,850 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:31:04,850 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:31:04,851 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:31:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -542953889, now seen corresponding path program 1 times [2018-09-10 10:31:04,851 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:31:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:04,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:04,852 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:31:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 262 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-10 10:31:05,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:31:05,557 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:31:05,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:05,566 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:31:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:05,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:31:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 274 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:31:06,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:31:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 208 proven. 68 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:31:06,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:31:06,619 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:31:06,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:06,634 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:31:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:07,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:31:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 234 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:31:07,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:31:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 208 proven. 68 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:31:08,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:31:08,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 10, 8] total 26 [2018-09-10 10:31:08,452 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:31:08,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-10 10:31:08,453 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-10 10:31:08,453 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2018-09-10 10:31:08,454 INFO L87 Difference]: Start difference. First operand 107097 states and 133084 transitions. Second operand 12 states. [2018-09-10 10:31:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:31:23,291 INFO L93 Difference]: Finished difference Result 198504 states and 263165 transitions. [2018-09-10 10:31:23,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-10 10:31:23,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 388 [2018-09-10 10:31:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:31:23,635 INFO L225 Difference]: With dead ends: 198504 [2018-09-10 10:31:23,635 INFO L226 Difference]: Without dead ends: 93862 [2018-09-10 10:31:23,832 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1698 GetRequests, 1599 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1339, Invalid=8561, Unknown=0, NotChecked=0, Total=9900 [2018-09-10 10:31:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93862 states. [2018-09-10 10:31:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93862 to 85501. [2018-09-10 10:31:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85501 states. [2018-09-10 10:31:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85501 states to 85501 states and 100203 transitions. [2018-09-10 10:31:26,488 INFO L78 Accepts]: Start accepts. Automaton has 85501 states and 100203 transitions. Word has length 388 [2018-09-10 10:31:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:31:26,489 INFO L480 AbstractCegarLoop]: Abstraction has 85501 states and 100203 transitions. [2018-09-10 10:31:26,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-10 10:31:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 85501 states and 100203 transitions. [2018-09-10 10:31:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-09-10 10:31:26,693 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:31:26,694 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:31:26,694 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:31:26,694 INFO L82 PathProgramCache]: Analyzing trace with hash 848151640, now seen corresponding path program 1 times [2018-09-10 10:31:26,694 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:31:26,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:26,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:26,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:26,695 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:31:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 304 proven. 125 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-09-10 10:31:27,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:31:27,316 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:31:27,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:27,324 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:31:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:27,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:31:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 448 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-10 10:31:28,206 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:31:28,356 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:31:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 448 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-10 10:31:28,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:31:28,810 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:31:28,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:28,825 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:31:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:29,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:31:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 448 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-10 10:31:30,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:31:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 448 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-10 10:31:30,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:31:30,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:31:30,534 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:31:30,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:31:30,535 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:31:30,535 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:31:30,536 INFO L87 Difference]: Start difference. First operand 85501 states and 100203 transitions. Second operand 9 states. [2018-09-10 10:31:31,256 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 10:31:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:31:49,901 INFO L93 Difference]: Finished difference Result 303413 states and 382639 transitions. [2018-09-10 10:31:49,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-10 10:31:49,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 470 [2018-09-10 10:31:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:31:51,003 INFO L225 Difference]: With dead ends: 303413 [2018-09-10 10:31:51,003 INFO L226 Difference]: Without dead ends: 233764 [2018-09-10 10:31:51,250 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1949 GetRequests, 1898 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=441, Invalid=2009, Unknown=0, NotChecked=0, Total=2450 [2018-09-10 10:31:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233764 states. [2018-09-10 10:31:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233764 to 213331. [2018-09-10 10:31:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213331 states. [2018-09-10 10:31:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213331 states to 213331 states and 245398 transitions. [2018-09-10 10:31:58,284 INFO L78 Accepts]: Start accepts. Automaton has 213331 states and 245398 transitions. Word has length 470 [2018-09-10 10:31:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:31:58,285 INFO L480 AbstractCegarLoop]: Abstraction has 213331 states and 245398 transitions. [2018-09-10 10:31:58,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:31:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 213331 states and 245398 transitions. [2018-09-10 10:31:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-09-10 10:31:58,705 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:31:58,705 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:31:58,705 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:31:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash -597119465, now seen corresponding path program 1 times [2018-09-10 10:31:58,706 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:31:58,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:58,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:58,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:31:58,707 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:31:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 358 proven. 34 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 10:31:59,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:31:59,244 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:31:59,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:31:59,257 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:31:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:31:59,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:31:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 458 proven. 2 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-10 10:31:59,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:32:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 358 proven. 34 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 10:32:00,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:32:00,051 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 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:32:00,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:00,067 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:32:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:01,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:32:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 458 proven. 2 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-10 10:32:01,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:32:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 358 proven. 34 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 10:32:01,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:32:01,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:32:01,374 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:32:01,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:32:01,375 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:32:01,375 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:32:01,375 INFO L87 Difference]: Start difference. First operand 213331 states and 245398 transitions. Second operand 9 states. [2018-09-10 10:32:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:21,565 INFO L93 Difference]: Finished difference Result 821563 states and 972511 transitions. [2018-09-10 10:32:21,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-10 10:32:21,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 478 [2018-09-10 10:32:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:24,186 INFO L225 Difference]: With dead ends: 821563 [2018-09-10 10:32:24,187 INFO L226 Difference]: Without dead ends: 629970 [2018-09-10 10:32:24,649 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1942 GetRequests, 1913 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2018-09-10 10:32:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629970 states. Received shutdown request... [2018-09-10 10:32:33,604 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:32:33,614 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:32:33,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:32:33 BoogieIcfgContainer [2018-09-10 10:32:33,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:32:33,616 INFO L168 Benchmark]: Toolchain (without parser) took 217279.13 ms. Allocated memory was 1.5 GB in the beginning and 5.7 GB in the end (delta: 4.2 GB). Free memory was 1.4 GB in the beginning and 4.5 GB in the end (delta: -3.1 GB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. [2018-09-10 10:32:33,617 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:32:33,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1144.05 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-09-10 10:32:33,618 INFO L168 Benchmark]: Boogie Procedure Inliner took 164.51 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 10:32:33,619 INFO L168 Benchmark]: Boogie Preprocessor took 426.72 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -917.7 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-10 10:32:33,620 INFO L168 Benchmark]: RCFGBuilder took 5393.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 285.0 MB). Peak memory consumption was 285.0 MB. Max. memory is 7.1 GB. [2018-09-10 10:32:33,620 INFO L168 Benchmark]: TraceAbstraction took 210140.12 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 4.5 GB in the end (delta: -2.6 GB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. [2018-09-10 10:32:33,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1144.05 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 164.51 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 426.72 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -917.7 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5393.33 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 285.0 MB). Peak memory consumption was 285.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210140.12 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.4 GB). Free memory was 2.0 GB in the beginning and 4.5 GB in the end (delta: -2.6 GB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1566]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1566). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 210.0s OverallTime, 18 OverallIterations, 7 TraceHistogramMax, 131.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4007 SDtfs, 31851 SDslu, 5954 SDs, 0 SdLazy, 42514 SolverSat, 9877 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15133 GetRequests, 14684 SyntacticMatches, 31 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6143 ImplicationChecksByTransitivity, 18.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213331occurred in iteration=17, 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: 38.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 46933 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 23.8s InterpolantComputationTime, 12789 NumberOfCodeBlocks, 12789 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 20031 ConstructedInterpolants, 0 QuantifiedInterpolants, 17291288 SizeOfPredicates, 75 NumberOfNonLiveVariables, 28082 ConjunctsInSsa, 236 ConjunctsInUnsatCore, 62 InterpolantComputations, 14 PerfectInterpolantSequences, 12428/13695 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_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-32-33-646.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-32-33-646.csv Completed graceful shutdown