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_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:26:57,687 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:26:57,689 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:26:57,706 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:26:57,706 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:26:57,707 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:26:57,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:26:57,718 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:26:57,720 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:26:57,721 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:26:57,722 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:26:57,722 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:26:57,723 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:26:57,724 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:26:57,725 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:26:57,727 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:26:57,728 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:26:57,730 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:26:57,731 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:26:57,733 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:26:57,734 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:26:57,735 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:26:57,737 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:26:57,737 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:26:57,737 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:26:57,738 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:26:57,739 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:26:57,739 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:26:57,740 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:26:57,741 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:26:57,741 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:26:57,742 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:26:57,742 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:26:57,742 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:26:57,743 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:26:57,744 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:26:57,744 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 10:26:57,772 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:26:57,772 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:26:57,773 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:26:57,773 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:26:57,774 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:26:57,774 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:26:57,774 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:26:57,774 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:26:57,774 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:26:57,775 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:26:57,775 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:26:57,776 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:26:57,776 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:26:57,776 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:26:57,776 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:26:57,777 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:26:57,778 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:26:57,778 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:26:57,778 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:26:57,778 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:26:57,780 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:26:57,780 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:26:57,780 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:26:57,780 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:26:57,780 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:26:57,781 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:26:57,781 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:26:57,781 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:26:57,781 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:26:57,782 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:26:57,782 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:26:57,782 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:26:57,782 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:26:57,857 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:26:57,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:26:57,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:26:57,875 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:26:57,876 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:26:57,876 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label19_true-unreach-call.c [2018-09-10 10:26:58,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb02590ce/73eebffb0d1b4049ae575b52a9d81bdc/FLAG8753dbb41 [2018-09-10 10:26:58,593 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:26:58,593 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label19_true-unreach-call.c [2018-09-10 10:26:58,616 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb02590ce/73eebffb0d1b4049ae575b52a9d81bdc/FLAG8753dbb41 [2018-09-10 10:26:58,631 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb02590ce/73eebffb0d1b4049ae575b52a9d81bdc [2018-09-10 10:26:58,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:26:58,643 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:26:58,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:26:58,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:26:58,651 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:26:58,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:26:58" (1/1) ... [2018-09-10 10:26:58,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f71a629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:58, skipping insertion in model container [2018-09-10 10:26:58,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:26:58" (1/1) ... [2018-09-10 10:26:58,942 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:26:59,505 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:26:59,525 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:26:59,778 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:26:59,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59 WrapperNode [2018-09-10 10:26:59,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:26:59,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:26:59,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:26:59,846 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:26:59,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:26:59,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:26:59,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:26:59,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:26:59,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:26:59,995 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:27:00,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:27:00,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:27:00,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:27:00,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:27:00,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:27:00,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:27:00,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (1/1) ... [2018-09-10 10:27:00,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:27:00,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:27:00,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:27:00,379 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:27:00,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (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 10:27:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:27:00,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:27:00,438 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 10:27:00,438 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 10:27:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:27:00,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:27:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:27:00,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:27:05,271 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:27:05,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:27:05 BoogieIcfgContainer [2018-09-10 10:27:05,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:27:05,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:27:05,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:27:05,276 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:27:05,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:26:58" (1/3) ... [2018-09-10 10:27:05,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c0dec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:27:05, skipping insertion in model container [2018-09-10 10:27:05,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:26:59" (2/3) ... [2018-09-10 10:27:05,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c0dec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:27:05, skipping insertion in model container [2018-09-10 10:27:05,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:27:05" (3/3) ... [2018-09-10 10:27:05,279 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label19_true-unreach-call.c [2018-09-10 10:27:05,289 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:27:05,300 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:27:05,350 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:27:05,351 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:27:05,351 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:27:05,351 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:27:05,351 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:27:05,351 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:27:05,351 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:27:05,352 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:27:05,352 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:27:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:27:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-10 10:27:05,409 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:05,411 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:05,412 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 10:27:05,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2122630385, now seen corresponding path program 1 times [2018-09-10 10:27:05,420 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:05,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:05,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:05,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:05,469 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:06,341 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:27:06,558 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 10:27:06,561 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:06,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:06,561 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:06,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:06,588 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:06,588 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:06,591 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-10 10:27:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:08,647 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-09-10 10:27:08,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:08,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2018-09-10 10:27:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:08,672 INFO L225 Difference]: With dead ends: 848 [2018-09-10 10:27:08,672 INFO L226 Difference]: Without dead ends: 534 [2018-09-10 10:27:08,680 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-09-10 10:27:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-09-10 10:27:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-10 10:27:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-09-10 10:27:08,768 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 194 [2018-09-10 10:27:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:08,770 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-09-10 10:27:08,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-09-10 10:27:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-10 10:27:08,780 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:08,781 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:08,781 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 10:27:08,782 INFO L82 PathProgramCache]: Analyzing trace with hash 639671669, now seen corresponding path program 1 times [2018-09-10 10:27:08,782 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:08,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:08,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:08,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:08,784 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:09,295 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:09,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:27:09,295 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:09,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:27:09,301 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:27:09,301 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:09,301 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-09-10 10:27:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:11,192 INFO L93 Difference]: Finished difference Result 1481 states and 2487 transitions. [2018-09-10 10:27:11,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:27:11,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2018-09-10 10:27:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:11,201 INFO L225 Difference]: With dead ends: 1481 [2018-09-10 10:27:11,202 INFO L226 Difference]: Without dead ends: 955 [2018-09-10 10:27:11,209 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:27:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2018-09-10 10:27:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 954. [2018-09-10 10:27:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2018-09-10 10:27:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1475 transitions. [2018-09-10 10:27:11,268 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1475 transitions. Word has length 207 [2018-09-10 10:27:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:11,269 INFO L480 AbstractCegarLoop]: Abstraction has 954 states and 1475 transitions. [2018-09-10 10:27:11,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:27:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1475 transitions. [2018-09-10 10:27:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-10 10:27:11,277 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:11,278 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:11,278 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 10:27:11,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1172684700, now seen corresponding path program 1 times [2018-09-10 10:27:11,279 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:11,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:11,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:11,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:11,280 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:11,543 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:27:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:11,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:11,588 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 10:27:11,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:11,608 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:11,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:12,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:12,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:12,758 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:27:12,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:12,782 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:13,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:13,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:13,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:27:13,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-09-10 10:27:13,979 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:27:13,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:27:13,981 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:27:13,981 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:27:13,982 INFO L87 Difference]: Start difference. First operand 954 states and 1475 transitions. Second operand 8 states. [2018-09-10 10:27:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:20,004 INFO L93 Difference]: Finished difference Result 3681 states and 6137 transitions. [2018-09-10 10:27:20,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:27:20,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 218 [2018-09-10 10:27:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:20,049 INFO L225 Difference]: With dead ends: 3681 [2018-09-10 10:27:20,049 INFO L226 Difference]: Without dead ends: 2733 [2018-09-10 10:27:20,059 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 865 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2018-09-10 10:27:20,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2018-09-10 10:27:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2666. [2018-09-10 10:27:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2666 states. [2018-09-10 10:27:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3830 transitions. [2018-09-10 10:27:20,186 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3830 transitions. Word has length 218 [2018-09-10 10:27:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:20,187 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 3830 transitions. [2018-09-10 10:27:20,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 10:27:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3830 transitions. [2018-09-10 10:27:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-10 10:27:20,200 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:20,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:20,201 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 10:27:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1274823046, now seen corresponding path program 1 times [2018-09-10 10:27:20,201 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:20,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:20,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:20,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:20,203 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:20,785 WARN L175 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 8 [2018-09-10 10:27:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:20,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:20,880 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:27:20,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:20,891 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:21,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:21,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:22,105 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:27:22,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 12 [2018-09-10 10:27:22,106 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:22,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:27:22,107 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:27:22,107 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:27:22,108 INFO L87 Difference]: Start difference. First operand 2666 states and 3830 transitions. Second operand 5 states. [2018-09-10 10:27:22,429 WARN L175 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:27:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:26,210 INFO L93 Difference]: Finished difference Result 8544 states and 13005 transitions. [2018-09-10 10:27:26,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:27:26,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2018-09-10 10:27:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:26,252 INFO L225 Difference]: With dead ends: 8544 [2018-09-10 10:27:26,252 INFO L226 Difference]: Without dead ends: 5884 [2018-09-10 10:27:26,270 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 448 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:27:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2018-09-10 10:27:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 5454. [2018-09-10 10:27:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5454 states. [2018-09-10 10:27:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 7838 transitions. [2018-09-10 10:27:26,429 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 7838 transitions. Word has length 227 [2018-09-10 10:27:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:26,429 INFO L480 AbstractCegarLoop]: Abstraction has 5454 states and 7838 transitions. [2018-09-10 10:27:26,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:27:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 7838 transitions. [2018-09-10 10:27:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-09-10 10:27:26,450 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:26,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:26,451 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 10:27:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1763412670, now seen corresponding path program 1 times [2018-09-10 10:27:26,452 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:26,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:26,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:26,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:26,453 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:26,705 WARN L175 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:27:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:26,749 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:27:26,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:27:26,749 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:27:26,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:27:26,750 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:27:26,750 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:27:26,750 INFO L87 Difference]: Start difference. First operand 5454 states and 7838 transitions. Second operand 6 states. [2018-09-10 10:27:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:27:28,967 INFO L93 Difference]: Finished difference Result 11501 states and 16941 transitions. [2018-09-10 10:27:28,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:27:28,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 229 [2018-09-10 10:27:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:27:28,998 INFO L225 Difference]: With dead ends: 11501 [2018-09-10 10:27:28,999 INFO L226 Difference]: Without dead ends: 6053 [2018-09-10 10:27:29,022 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:27:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6053 states. [2018-09-10 10:27:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6053 to 5875. [2018-09-10 10:27:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5875 states. [2018-09-10 10:27:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5875 states to 5875 states and 7802 transitions. [2018-09-10 10:27:29,173 INFO L78 Accepts]: Start accepts. Automaton has 5875 states and 7802 transitions. Word has length 229 [2018-09-10 10:27:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:29,174 INFO L480 AbstractCegarLoop]: Abstraction has 5875 states and 7802 transitions. [2018-09-10 10:27:29,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:27:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5875 states and 7802 transitions. [2018-09-10 10:27:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-09-10 10:27:29,192 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:29,193 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:27:29,193 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 10:27:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash 631853219, now seen corresponding path program 1 times [2018-09-10 10:27:29,193 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:29,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:29,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:29,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:29,195 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:29,503 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 3 [2018-09-10 10:27:29,870 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:27:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:30,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:30,159 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 10:27:30,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:30,167 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:30,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:30,646 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:30,765 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-09-10 10:27:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:31,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:31,430 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:27:31,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:31,452 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:31,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:27:32,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:32,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:27:32,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 6, 8] total 28 [2018-09-10 10:27:32,650 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:27:32,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 10:27:32,651 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 10:27:32,652 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2018-09-10 10:27:32,652 INFO L87 Difference]: Start difference. First operand 5875 states and 7802 transitions. Second operand 17 states. [2018-09-10 10:27:39,102 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 10:27:39,369 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2018-09-10 10:27:42,701 WARN L175 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2018-09-10 10:27:45,297 WARN L175 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2018-09-10 10:27:46,203 WARN L175 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-09-10 10:27:47,095 WARN L175 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-09-10 10:27:47,655 WARN L175 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-10 10:27:48,703 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 10:27:49,624 WARN L175 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-09-10 10:27:54,924 WARN L175 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-09-10 10:28:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:46,096 INFO L93 Difference]: Finished difference Result 42540 states and 87964 transitions. [2018-09-10 10:28:46,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2018-09-10 10:28:46,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 239 [2018-09-10 10:28:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:46,452 INFO L225 Difference]: With dead ends: 42540 [2018-09-10 10:28:46,452 INFO L226 Difference]: Without dead ends: 36668 [2018-09-10 10:28:46,600 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1259 GetRequests, 936 SyntacticMatches, 6 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45056 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=11442, Invalid=90000, Unknown=0, NotChecked=0, Total=101442 [2018-09-10 10:28:46,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36668 states. [2018-09-10 10:28:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36668 to 34154. [2018-09-10 10:28:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34154 states. [2018-09-10 10:28:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34154 states to 34154 states and 55275 transitions. [2018-09-10 10:28:48,451 INFO L78 Accepts]: Start accepts. Automaton has 34154 states and 55275 transitions. Word has length 239 [2018-09-10 10:28:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:28:48,451 INFO L480 AbstractCegarLoop]: Abstraction has 34154 states and 55275 transitions. [2018-09-10 10:28:48,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 10:28:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34154 states and 55275 transitions. [2018-09-10 10:28:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-10 10:28:48,580 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:28:48,581 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:28:48,581 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 10:28:48,582 INFO L82 PathProgramCache]: Analyzing trace with hash -132533247, now seen corresponding path program 1 times [2018-09-10 10:28:48,582 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:28:48,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:48,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:48,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:28:48,583 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:28:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 70 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-10 10:28:49,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:49,052 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 10:28:49,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:49,069 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:49,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:28:49,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:28:49,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:28:49,552 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 10:28:49,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:28:49,569 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:28:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:28:50,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:28:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:28:50,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:28:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:28:50,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:28:50,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:28:50,979 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:28:50,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:28:50,980 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:28:50,980 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:28:50,980 INFO L87 Difference]: Start difference. First operand 34154 states and 55275 transitions. Second operand 9 states. [2018-09-10 10:28:57,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:28:57,876 INFO L93 Difference]: Finished difference Result 122339 states and 224232 transitions. [2018-09-10 10:28:57,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:28:57,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 252 [2018-09-10 10:28:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:28:58,700 INFO L225 Difference]: With dead ends: 122339 [2018-09-10 10:28:58,700 INFO L226 Difference]: Without dead ends: 87335 [2018-09-10 10:28:58,971 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 1001 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2018-09-10 10:28:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87335 states. [2018-09-10 10:29:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87335 to 82450. [2018-09-10 10:29:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82450 states. [2018-09-10 10:29:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82450 states to 82450 states and 132790 transitions. [2018-09-10 10:29:03,209 INFO L78 Accepts]: Start accepts. Automaton has 82450 states and 132790 transitions. Word has length 252 [2018-09-10 10:29:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:03,210 INFO L480 AbstractCegarLoop]: Abstraction has 82450 states and 132790 transitions. [2018-09-10 10:29:03,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:29:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 82450 states and 132790 transitions. [2018-09-10 10:29:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-10 10:29:03,251 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:03,251 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:03,251 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 10:29:03,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1547866221, now seen corresponding path program 1 times [2018-09-10 10:29:03,252 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:03,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:03,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:03,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:03,253 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:03,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:03,766 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 10:29:03,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:03,781 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:04,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:04,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:04,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:04,241 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 10:29:04,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:04,261 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:04,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:05,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:05,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:29:05,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-10 10:29:05,832 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:29:05,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:29:05,833 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:29:05,834 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:29:05,834 INFO L87 Difference]: Start difference. First operand 82450 states and 132790 transitions. Second operand 6 states. [2018-09-10 10:29:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:14,217 INFO L93 Difference]: Finished difference Result 174594 states and 315246 transitions. [2018-09-10 10:29:14,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:29:14,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 251 [2018-09-10 10:29:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:14,748 INFO L225 Difference]: With dead ends: 174594 [2018-09-10 10:29:14,748 INFO L226 Difference]: Without dead ends: 92150 [2018-09-10 10:29:15,020 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 998 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:29:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92150 states. [2018-09-10 10:29:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92150 to 85145. [2018-09-10 10:29:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85145 states. [2018-09-10 10:29:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85145 states to 85145 states and 125418 transitions. [2018-09-10 10:29:19,729 INFO L78 Accepts]: Start accepts. Automaton has 85145 states and 125418 transitions. Word has length 251 [2018-09-10 10:29:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:19,729 INFO L480 AbstractCegarLoop]: Abstraction has 85145 states and 125418 transitions. [2018-09-10 10:29:19,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:29:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 85145 states and 125418 transitions. [2018-09-10 10:29:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-10 10:29:19,772 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:19,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:19,773 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 10:29:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash 813757774, now seen corresponding path program 1 times [2018-09-10 10:29:19,773 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:19,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:19,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:19,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:19,775 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:29:20,338 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:29:20,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-10 10:29:20,338 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:20,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:29:20,338 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:29:20,339 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:29:20,339 INFO L87 Difference]: Start difference. First operand 85145 states and 125418 transitions. Second operand 7 states. [2018-09-10 10:29:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:37,444 INFO L93 Difference]: Finished difference Result 254554 states and 472705 transitions. [2018-09-10 10:29:37,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 10:29:37,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2018-09-10 10:29:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:38,530 INFO L225 Difference]: With dead ends: 254554 [2018-09-10 10:29:38,530 INFO L226 Difference]: Without dead ends: 173046 [2018-09-10 10:29:38,810 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:29:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173046 states. [2018-09-10 10:29:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173046 to 152718. [2018-09-10 10:29:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152718 states. [2018-09-10 10:29:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152718 states to 152718 states and 227589 transitions. [2018-09-10 10:29:46,118 INFO L78 Accepts]: Start accepts. Automaton has 152718 states and 227589 transitions. Word has length 250 [2018-09-10 10:29:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:29:46,118 INFO L480 AbstractCegarLoop]: Abstraction has 152718 states and 227589 transitions. [2018-09-10 10:29:46,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:29:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 152718 states and 227589 transitions. [2018-09-10 10:29:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-10 10:29:46,173 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:29:46,173 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, 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] [2018-09-10 10:29:46,173 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 10:29:46,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1868338442, now seen corresponding path program 1 times [2018-09-10 10:29:46,174 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:29:46,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:46,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:46,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:29:46,176 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:29:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 10:29:46,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:29:46,501 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 10:29:46,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:29:46,508 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:29:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:29:46,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:29:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 10:29:46,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:29:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 10:29:47,108 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:29:47,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-09-10 10:29:47,108 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:29:47,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 10:29:47,109 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 10:29:47,109 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:29:47,109 INFO L87 Difference]: Start difference. First operand 152718 states and 227589 transitions. Second operand 4 states. [2018-09-10 10:29:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:29:54,275 INFO L93 Difference]: Finished difference Result 300721 states and 448559 transitions. [2018-09-10 10:29:54,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 10:29:54,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 262 [2018-09-10 10:29:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:29:55,035 INFO L225 Difference]: With dead ends: 300721 [2018-09-10 10:29:55,035 INFO L226 Difference]: Without dead ends: 150265 [2018-09-10 10:29:56,432 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 521 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:29:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150265 states. [2018-09-10 10:30:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150265 to 147434. [2018-09-10 10:30:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147434 states. [2018-09-10 10:30:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147434 states to 147434 states and 215289 transitions. [2018-09-10 10:30:01,224 INFO L78 Accepts]: Start accepts. Automaton has 147434 states and 215289 transitions. Word has length 262 [2018-09-10 10:30:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:01,225 INFO L480 AbstractCegarLoop]: Abstraction has 147434 states and 215289 transitions. [2018-09-10 10:30:01,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 10:30:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 147434 states and 215289 transitions. [2018-09-10 10:30:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-10 10:30:01,301 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:01,302 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:01,302 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 10:30:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash -614547771, now seen corresponding path program 1 times [2018-09-10 10:30:01,302 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:01,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:01,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:01,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:01,303 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:30:01,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:01,636 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 10:30:01,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:01,645 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:01,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:30:02,065 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:30:02,206 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:30:02,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:30:02,206 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:30:02,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:30:02,207 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:30:02,207 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:30:02,207 INFO L87 Difference]: Start difference. First operand 147434 states and 215289 transitions. Second operand 3 states. [2018-09-10 10:30:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:30:12,317 INFO L93 Difference]: Finished difference Result 384821 states and 562932 transitions. [2018-09-10 10:30:12,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:30:12,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 284 [2018-09-10 10:30:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:30:13,350 INFO L225 Difference]: With dead ends: 384821 [2018-09-10 10:30:13,350 INFO L226 Difference]: Without dead ends: 237398 [2018-09-10 10:30:13,920 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:30:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237398 states. [2018-09-10 10:30:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237398 to 237193. [2018-09-10 10:30:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237193 states. [2018-09-10 10:30:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237193 states to 237193 states and 330320 transitions. [2018-09-10 10:30:22,451 INFO L78 Accepts]: Start accepts. Automaton has 237193 states and 330320 transitions. Word has length 284 [2018-09-10 10:30:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:30:22,451 INFO L480 AbstractCegarLoop]: Abstraction has 237193 states and 330320 transitions. [2018-09-10 10:30:22,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:30:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 237193 states and 330320 transitions. [2018-09-10 10:30:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-10 10:30:22,561 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:30:22,561 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:22,562 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 10:30:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash 772042967, now seen corresponding path program 1 times [2018-09-10 10:30:22,562 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:30:22,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:22,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:22,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:30:22,563 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:30:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:30:22,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:22,887 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 10:30:22,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:22,895 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:23,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-10 10:30:29,296 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-10 10:30:29,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:30:29,937 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:30:29,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:30:29,952 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:30:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:30:30,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:30:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-10 10:30:30,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:30:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-10 10:30:30,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:30:30,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-09-10 10:30:30,859 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:30:30,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:30:30,860 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:30:30,861 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:30:30,861 INFO L87 Difference]: Start difference. First operand 237193 states and 330320 transitions. Second operand 8 states. Received shutdown request... [2018-09-10 10:30:38,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-10 10:30:38,007 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:30:38,018 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:30:38,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:30:38 BoogieIcfgContainer [2018-09-10 10:30:38,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:30:38,020 INFO L168 Benchmark]: Toolchain (without parser) took 219378.51 ms. Allocated memory was 1.5 GB in the beginning and 5.4 GB in the end (delta: 3.9 GB). Free memory was 1.4 GB in the beginning and 3.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-10 10:30:38,021 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:30:38,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1200.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:38,023 INFO L168 Benchmark]: Boogie Procedure Inliner took 149.34 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 10:30:38,024 INFO L168 Benchmark]: Boogie Preprocessor took 382.94 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 771.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -902.1 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:38,025 INFO L168 Benchmark]: RCFGBuilder took 4893.41 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 283.2 MB). Peak memory consumption was 283.2 MB. Max. memory is 7.1 GB. [2018-09-10 10:30:38,025 INFO L168 Benchmark]: TraceAbstraction took 212746.28 ms. Allocated memory was 2.3 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 1.9 GB in the beginning and 3.8 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-10 10:30:38,030 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1200.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 149.34 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 382.94 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 771.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -902.1 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4893.41 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 283.2 MB). Peak memory consumption was 283.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212746.28 ms. Allocated memory was 2.3 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 1.9 GB in the beginning and 3.8 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1596]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1596). Cancelled while BasicCegarLoop was constructing difference of abstraction (237193states) and FLOYD_HOARE automaton (currently 22 states, 8 states before enhancement), while ReachableStatesComputation was computing reachable states (449443 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 212.6s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 154.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2828 SDtfs, 28066 SDslu, 3844 SDs, 0 SdLazy, 41339 SolverSat, 20668 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7053 GetRequests, 6592 SyntacticMatches, 30 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45421 ImplicationChecksByTransitivity, 24.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=237193occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 31.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 38446 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 6236 NumberOfCodeBlocks, 6236 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 9511 ConstructedInterpolants, 0 QuantifiedInterpolants, 5948034 SizeOfPredicates, 63 NumberOfNonLiveVariables, 14228 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 38 InterpolantComputations, 9 PerfectInterpolantSequences, 2462/2798 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_label19_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-30-38-048.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label19_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-30-38-048.csv Completed graceful shutdown