java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:48:09,854 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:48:09,856 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:48:09,868 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:48:09,868 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:48:09,869 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:48:09,871 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:48:09,873 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:48:09,874 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:48:09,875 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:48:09,878 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:48:09,879 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:48:09,880 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:48:09,880 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:48:09,883 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:48:09,884 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:48:09,885 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:48:09,891 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:48:09,898 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:48:09,899 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:48:09,900 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:48:09,902 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:48:09,906 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-24 12:48:09,916 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:48:09,917 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:48:09,920 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:48:09,920 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:48:09,921 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:48:09,951 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:48:09,951 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:48:09,952 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:48:09,955 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:48:09,955 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:48:09,955 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:48:09,955 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:48:09,956 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:48:09,956 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:48:09,956 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:48:09,956 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:48:09,957 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:48:09,957 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:48:09,957 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:48:09,957 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:48:09,958 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:48:09,958 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:48:09,958 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:48:09,958 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:48:09,958 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:48:09,959 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:48:09,959 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:48:09,959 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:48:09,959 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:48:09,959 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:48:09,960 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:48:09,960 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:48:09,960 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:48:09,960 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:48:09,960 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:48:09,961 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:48:09,961 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:48:09,961 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:48:10,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:48:10,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:48:10,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:48:10,021 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:48:10,021 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:48:10,022 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-07-24 12:48:10,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bb01382/61c4427cb42844d89363b775a6b2a11d/FLAG1fd5c0df4 [2018-07-24 12:48:10,800 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:48:10,801 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-07-24 12:48:10,827 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bb01382/61c4427cb42844d89363b775a6b2a11d/FLAG1fd5c0df4 [2018-07-24 12:48:10,842 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bb01382/61c4427cb42844d89363b775a6b2a11d [2018-07-24 12:48:10,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:48:10,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:48:10,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:48:10,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:48:10,863 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:48:10,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:48:10" (1/1) ... [2018-07-24 12:48:10,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c2495d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:10, skipping insertion in model container [2018-07-24 12:48:10,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:48:10" (1/1) ... [2018-07-24 12:48:11,081 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:48:11,522 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:48:11,540 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:48:11,802 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:48:11,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11 WrapperNode [2018-07-24 12:48:11,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:48:11,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:48:11,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:48:11,880 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:48:11,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:11,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:48:12,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:48:12,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:48:12,017 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:48:12,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... [2018-07-24 12:48:12,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:48:12,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:48:12,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:48:12,417 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:48:12,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:48:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:48:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:48:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:48:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:48:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:48:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:48:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:48:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:48:18,407 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:48:18,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:48:18 BoogieIcfgContainer [2018-07-24 12:48:18,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:48:18,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:48:18,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:48:18,421 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:48:18,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:48:10" (1/3) ... [2018-07-24 12:48:18,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6effc989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:48:18, skipping insertion in model container [2018-07-24 12:48:18,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:48:11" (2/3) ... [2018-07-24 12:48:18,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6effc989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:48:18, skipping insertion in model container [2018-07-24 12:48:18,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:48:18" (3/3) ... [2018-07-24 12:48:18,431 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12_true-unreach-call.c [2018-07-24 12:48:18,442 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:48:18,459 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:48:18,542 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:48:18,543 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:48:18,543 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:48:18,543 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:48:18,543 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:48:18,543 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:48:18,544 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:48:18,544 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:48:18,544 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:48:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:48:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-24 12:48:18,621 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:18,623 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:18,623 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:18,629 INFO L82 PathProgramCache]: Analyzing trace with hash -927745007, now seen corresponding path program 1 times [2018-07-24 12:48:18,632 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:18,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:18,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:18,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:18,694 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:19,576 WARN L169 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:48:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:19,778 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:19,778 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:48:19,778 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:19,785 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:19,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:19,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:19,804 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:48:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:22,119 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-07-24 12:48:22,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:22,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-07-24 12:48:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:22,157 INFO L225 Difference]: With dead ends: 838 [2018-07-24 12:48:22,157 INFO L226 Difference]: Without dead ends: 524 [2018-07-24 12:48:22,173 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-07-24 12:48:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-07-24 12:48:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-07-24 12:48:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-07-24 12:48:22,281 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 170 [2018-07-24 12:48:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:22,282 INFO L471 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-07-24 12:48:22,282 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-07-24 12:48:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-24 12:48:22,292 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:22,293 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:22,293 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1807947448, now seen corresponding path program 1 times [2018-07-24 12:48:22,294 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:22,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:22,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:22,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:22,297 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:22,603 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:22,603 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:48:22,603 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:22,605 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:48:22,606 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:48:22,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:48:22,606 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-07-24 12:48:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:26,771 INFO L93 Difference]: Finished difference Result 1271 states and 2186 transitions. [2018-07-24 12:48:26,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:48:26,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-07-24 12:48:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:26,780 INFO L225 Difference]: With dead ends: 1271 [2018-07-24 12:48:26,781 INFO L226 Difference]: Without dead ends: 755 [2018-07-24 12:48:26,783 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:48:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2018-07-24 12:48:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 739. [2018-07-24 12:48:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2018-07-24 12:48:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1100 transitions. [2018-07-24 12:48:26,826 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1100 transitions. Word has length 180 [2018-07-24 12:48:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:26,826 INFO L471 AbstractCegarLoop]: Abstraction has 739 states and 1100 transitions. [2018-07-24 12:48:26,826 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:48:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1100 transitions. [2018-07-24 12:48:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-24 12:48:26,830 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:26,831 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:26,831 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:26,831 INFO L82 PathProgramCache]: Analyzing trace with hash 479453333, now seen corresponding path program 1 times [2018-07-24 12:48:26,831 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:26,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:26,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:26,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:26,833 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:27,132 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:48:27,132 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:48:27,132 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:27,133 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:27,133 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:27,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:27,134 INFO L87 Difference]: Start difference. First operand 739 states and 1100 transitions. Second operand 3 states. [2018-07-24 12:48:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:29,582 INFO L93 Difference]: Finished difference Result 2125 states and 3250 transitions. [2018-07-24 12:48:29,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:29,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-07-24 12:48:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:29,598 INFO L225 Difference]: With dead ends: 2125 [2018-07-24 12:48:29,598 INFO L226 Difference]: Without dead ends: 1392 [2018-07-24 12:48:29,602 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:48:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2018-07-24 12:48:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1378. [2018-07-24 12:48:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1378 states. [2018-07-24 12:48:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 2007 transitions. [2018-07-24 12:48:29,656 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 2007 transitions. Word has length 183 [2018-07-24 12:48:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:29,657 INFO L471 AbstractCegarLoop]: Abstraction has 1378 states and 2007 transitions. [2018-07-24 12:48:29,657 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 2007 transitions. [2018-07-24 12:48:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-24 12:48:29,663 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:29,663 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:29,664 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1241817260, now seen corresponding path program 1 times [2018-07-24 12:48:29,664 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:29,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:29,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:29,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:29,666 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:29,995 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:29,995 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:30,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:30,004 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:30,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:30,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:48:31,076 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:48:31,076 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:48:31,076 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:31,077 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:48:31,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:48:31,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:31,078 INFO L87 Difference]: Start difference. First operand 1378 states and 2007 transitions. Second operand 3 states. [2018-07-24 12:48:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:33,512 INFO L93 Difference]: Finished difference Result 4060 states and 6060 transitions. [2018-07-24 12:48:33,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:48:33,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2018-07-24 12:48:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:33,531 INFO L225 Difference]: With dead ends: 4060 [2018-07-24 12:48:33,531 INFO L226 Difference]: Without dead ends: 2688 [2018-07-24 12:48:33,537 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 400 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:48:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2018-07-24 12:48:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2674. [2018-07-24 12:48:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2018-07-24 12:48:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3863 transitions. [2018-07-24 12:48:33,636 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3863 transitions. Word has length 201 [2018-07-24 12:48:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:33,638 INFO L471 AbstractCegarLoop]: Abstraction has 2674 states and 3863 transitions. [2018-07-24 12:48:33,638 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:48:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3863 transitions. [2018-07-24 12:48:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-24 12:48:33,649 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:33,649 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:33,650 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash 907447766, now seen corresponding path program 1 times [2018-07-24 12:48:33,650 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:33,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:33,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:33,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:33,651 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:34,175 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:34,175 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:34,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:34,192 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:34,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-07-24 12:48:34,718 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:34,848 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:48:34,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 12:48:34,848 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:48:34,849 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:48:34,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:48:34,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:48:34,851 INFO L87 Difference]: Start difference. First operand 2674 states and 3863 transitions. Second operand 5 states. [2018-07-24 12:48:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:37,560 INFO L93 Difference]: Finished difference Result 5669 states and 8271 transitions. [2018-07-24 12:48:37,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:48:37,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2018-07-24 12:48:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:37,581 INFO L225 Difference]: With dead ends: 5669 [2018-07-24 12:48:37,582 INFO L226 Difference]: Without dead ends: 3001 [2018-07-24 12:48:37,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:48:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2018-07-24 12:48:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2914. [2018-07-24 12:48:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2914 states. [2018-07-24 12:48:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 3999 transitions. [2018-07-24 12:48:37,676 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 3999 transitions. Word has length 222 [2018-07-24 12:48:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:37,676 INFO L471 AbstractCegarLoop]: Abstraction has 2914 states and 3999 transitions. [2018-07-24 12:48:37,676 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:48:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 3999 transitions. [2018-07-24 12:48:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-24 12:48:37,687 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:37,687 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:48:37,687 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash 578363258, now seen corresponding path program 1 times [2018-07-24 12:48:37,688 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:37,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:37,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:37,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:37,689 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:38,208 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:38,209 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:38,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:38,225 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:38,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:38,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:39,192 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:39,192 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:48:39,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:39,280 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:39,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:40,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:48:40,863 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:48:40,864 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-07-24 12:48:40,864 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:48:40,865 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:48:40,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:48:40,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:48:40,865 INFO L87 Difference]: Start difference. First operand 2914 states and 3999 transitions. Second operand 8 states. [2018-07-24 12:48:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:48:48,848 INFO L93 Difference]: Finished difference Result 19230 states and 33763 transitions. [2018-07-24 12:48:48,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-24 12:48:48,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 224 [2018-07-24 12:48:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:48:49,018 INFO L225 Difference]: With dead ends: 19230 [2018-07-24 12:48:49,019 INFO L226 Difference]: Without dead ends: 16322 [2018-07-24 12:48:49,085 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 905 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2018-07-24 12:48:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16322 states. [2018-07-24 12:48:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16322 to 15631. [2018-07-24 12:48:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15631 states. [2018-07-24 12:48:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15631 states to 15631 states and 21222 transitions. [2018-07-24 12:48:49,729 INFO L78 Accepts]: Start accepts. Automaton has 15631 states and 21222 transitions. Word has length 224 [2018-07-24 12:48:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:48:49,729 INFO L471 AbstractCegarLoop]: Abstraction has 15631 states and 21222 transitions. [2018-07-24 12:48:49,729 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:48:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 15631 states and 21222 transitions. [2018-07-24 12:48:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-07-24 12:48:49,787 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:48:49,788 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:48:49,788 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:48:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1403817372, now seen corresponding path program 1 times [2018-07-24 12:48:49,788 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:48:49,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:49,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:49,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:48:49,791 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:48:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:50,268 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:50,268 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:48:50,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:50,278 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:50,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:50,714 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:51,140 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:48:51,140 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:48:51,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:48:51,157 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:48:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:48:51,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:48:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:51,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:48:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:48:52,170 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:48:52,171 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 16 [2018-07-24 12:48:52,171 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:48:52,172 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 12:48:52,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 12:48:52,172 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:48:52,173 INFO L87 Difference]: Start difference. First operand 15631 states and 21222 transitions. Second operand 12 states. [2018-07-24 12:49:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:12,971 INFO L93 Difference]: Finished difference Result 68780 states and 112240 transitions. [2018-07-24 12:49:12,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-24 12:49:12,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 251 [2018-07-24 12:49:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:13,302 INFO L225 Difference]: With dead ends: 68780 [2018-07-24 12:49:13,302 INFO L226 Difference]: Without dead ends: 53159 [2018-07-24 12:49:13,459 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1594, Invalid=8912, Unknown=0, NotChecked=0, Total=10506 [2018-07-24 12:49:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53159 states. [2018-07-24 12:49:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53159 to 49891. [2018-07-24 12:49:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49891 states. [2018-07-24 12:49:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49891 states to 49891 states and 64690 transitions. [2018-07-24 12:49:15,265 INFO L78 Accepts]: Start accepts. Automaton has 49891 states and 64690 transitions. Word has length 251 [2018-07-24 12:49:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:15,265 INFO L471 AbstractCegarLoop]: Abstraction has 49891 states and 64690 transitions. [2018-07-24 12:49:15,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 12:49:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 49891 states and 64690 transitions. [2018-07-24 12:49:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-07-24 12:49:15,397 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:15,398 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:49:15,398 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:15,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1697646380, now seen corresponding path program 1 times [2018-07-24 12:49:15,399 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:15,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:15,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:15,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:15,400 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:16,038 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:16,039 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:16,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:16,052 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:16,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:16,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:17,063 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:17,063 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:17,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:17,080 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:17,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 113 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:17,812 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:17,995 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:17,996 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-07-24 12:49:17,996 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:17,997 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:49:17,997 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:49:17,997 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:49:17,997 INFO L87 Difference]: Start difference. First operand 49891 states and 64690 transitions. Second operand 6 states. [2018-07-24 12:49:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:19,549 INFO L93 Difference]: Finished difference Result 86074 states and 111673 transitions. [2018-07-24 12:49:19,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 12:49:19,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 290 [2018-07-24 12:49:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:19,716 INFO L225 Difference]: With dead ends: 86074 [2018-07-24 12:49:19,716 INFO L226 Difference]: Without dead ends: 48053 [2018-07-24 12:49:19,794 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1148 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:49:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48053 states. [2018-07-24 12:49:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48053 to 47843. [2018-07-24 12:49:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47843 states. [2018-07-24 12:49:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47843 states to 47843 states and 60834 transitions. [2018-07-24 12:49:20,763 INFO L78 Accepts]: Start accepts. Automaton has 47843 states and 60834 transitions. Word has length 290 [2018-07-24 12:49:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:20,764 INFO L471 AbstractCegarLoop]: Abstraction has 47843 states and 60834 transitions. [2018-07-24 12:49:20,764 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:49:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 47843 states and 60834 transitions. [2018-07-24 12:49:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-07-24 12:49:20,838 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:20,839 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:49:20,839 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash -794164287, now seen corresponding path program 1 times [2018-07-24 12:49:20,839 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:20,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:20,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:20,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:20,841 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:49:21,462 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:21,462 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:21,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:21,807 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:22,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:22,737 WARN L169 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:49:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-07-24 12:49:22,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:23,237 WARN L169 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-07-24 12:49:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:49:23,414 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:23,415 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:23,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:23,431 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:24,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 167 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:24,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 173 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:24,833 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:24,833 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 11, 8] total 27 [2018-07-24 12:49:24,834 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:24,834 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:49:24,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:49:24,835 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:49:24,835 INFO L87 Difference]: Start difference. First operand 47843 states and 60834 transitions. Second operand 11 states. [2018-07-24 12:49:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:29,504 INFO L93 Difference]: Finished difference Result 84510 states and 111670 transitions. [2018-07-24 12:49:29,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:49:29,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 309 [2018-07-24 12:49:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:29,667 INFO L225 Difference]: With dead ends: 84510 [2018-07-24 12:49:29,667 INFO L226 Difference]: Without dead ends: 44136 [2018-07-24 12:49:29,736 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1255 GetRequests, 1223 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 12:49:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44136 states. [2018-07-24 12:49:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44136 to 43179. [2018-07-24 12:49:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43179 states. [2018-07-24 12:49:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43179 states to 43179 states and 52257 transitions. [2018-07-24 12:49:30,640 INFO L78 Accepts]: Start accepts. Automaton has 43179 states and 52257 transitions. Word has length 309 [2018-07-24 12:49:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:30,640 INFO L471 AbstractCegarLoop]: Abstraction has 43179 states and 52257 transitions. [2018-07-24 12:49:30,640 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:49:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 43179 states and 52257 transitions. [2018-07-24 12:49:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-07-24 12:49:30,707 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:30,708 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:49:30,708 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:30,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1951545713, now seen corresponding path program 1 times [2018-07-24 12:49:30,708 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:30,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:30,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:30,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:30,710 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 187 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:49:31,114 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:31,114 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:31,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:31,126 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:31,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:49:31,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:49:31,816 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:31,816 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:31,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:31,832 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:32,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:49:32,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:49:32,776 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:32,777 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-07-24 12:49:32,777 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:32,777 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:49:32,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:49:32,778 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:49:32,778 INFO L87 Difference]: Start difference. First operand 43179 states and 52257 transitions. Second operand 9 states. [2018-07-24 12:49:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:42,153 INFO L93 Difference]: Finished difference Result 116445 states and 147210 transitions. [2018-07-24 12:49:42,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-24 12:49:42,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 341 [2018-07-24 12:49:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:42,487 INFO L225 Difference]: With dead ends: 116445 [2018-07-24 12:49:42,487 INFO L226 Difference]: Without dead ends: 74193 [2018-07-24 12:49:42,596 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 1389 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=2568, Unknown=0, NotChecked=0, Total=3080 [2018-07-24 12:49:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74193 states. [2018-07-24 12:49:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74193 to 70888. [2018-07-24 12:49:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70888 states. [2018-07-24 12:49:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70888 states to 70888 states and 82963 transitions. [2018-07-24 12:49:44,984 INFO L78 Accepts]: Start accepts. Automaton has 70888 states and 82963 transitions. Word has length 341 [2018-07-24 12:49:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:44,985 INFO L471 AbstractCegarLoop]: Abstraction has 70888 states and 82963 transitions. [2018-07-24 12:49:44,985 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:49:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 70888 states and 82963 transitions. [2018-07-24 12:49:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-07-24 12:49:45,057 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:45,058 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:49:45,058 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1906676144, now seen corresponding path program 1 times [2018-07-24 12:49:45,059 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:45,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:45,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:45,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:45,060 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:45,764 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:45,764 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:45,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:45,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:46,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:46,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:46,378 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:46,379 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:49:46,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:46,396 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:47,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:47,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:49:47,237 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:49:47,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 7 [2018-07-24 12:49:47,237 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:49:47,238 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:49:47,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:49:47,238 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:49:47,239 INFO L87 Difference]: Start difference. First operand 70888 states and 82963 transitions. Second operand 6 states. [2018-07-24 12:49:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:49:51,057 INFO L93 Difference]: Finished difference Result 218401 states and 269126 transitions. [2018-07-24 12:49:51,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:49:51,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2018-07-24 12:49:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:49:51,607 INFO L225 Difference]: With dead ends: 218401 [2018-07-24 12:49:51,607 INFO L226 Difference]: Without dead ends: 163986 [2018-07-24 12:49:51,729 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1356 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:49:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163986 states. [2018-07-24 12:49:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163986 to 160472. [2018-07-24 12:49:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160472 states. [2018-07-24 12:49:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160472 states to 160472 states and 189941 transitions. [2018-07-24 12:49:55,264 INFO L78 Accepts]: Start accepts. Automaton has 160472 states and 189941 transitions. Word has length 340 [2018-07-24 12:49:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:49:55,265 INFO L471 AbstractCegarLoop]: Abstraction has 160472 states and 189941 transitions. [2018-07-24 12:49:55,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:49:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 160472 states and 189941 transitions. [2018-07-24 12:49:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-07-24 12:49:55,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:49:55,412 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:49:55,412 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:49:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1631604144, now seen corresponding path program 1 times [2018-07-24 12:49:55,412 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:49:55,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:55,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:55,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:49:55,413 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:49:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 175 proven. 8 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-07-24 12:49:55,758 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:49:55,758 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:49:55,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:49:55,767 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:49:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:49:56,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:49:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-07-24 12:49:56,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:49:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 163 proven. 75 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:49:57,279 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:49:57,279 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-07-24 12:49:57,279 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:49:57,280 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:49:57,280 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:49:57,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:49:57,280 INFO L87 Difference]: Start difference. First operand 160472 states and 189941 transitions. Second operand 6 states. [2018-07-24 12:50:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:01,627 INFO L93 Difference]: Finished difference Result 279988 states and 328215 transitions. [2018-07-24 12:50:01,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:50:01,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 346 [2018-07-24 12:50:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:02,165 INFO L225 Difference]: With dead ends: 279988 [2018-07-24 12:50:02,166 INFO L226 Difference]: Without dead ends: 162912 [2018-07-24 12:50:02,373 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 684 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:50:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162912 states. [2018-07-24 12:50:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162912 to 161188. [2018-07-24 12:50:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161188 states. [2018-07-24 12:50:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161188 states to 161188 states and 190499 transitions. [2018-07-24 12:50:06,487 INFO L78 Accepts]: Start accepts. Automaton has 161188 states and 190499 transitions. Word has length 346 [2018-07-24 12:50:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:06,487 INFO L471 AbstractCegarLoop]: Abstraction has 161188 states and 190499 transitions. [2018-07-24 12:50:06,487 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:50:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 161188 states and 190499 transitions. [2018-07-24 12:50:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-07-24 12:50:06,603 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:06,603 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:06,603 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:06,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1860691939, now seen corresponding path program 1 times [2018-07-24 12:50:06,604 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:06,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:06,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:06,605 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:06,884 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-07-24 12:50:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 167 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:50:07,229 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:07,229 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:07,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:07,238 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:08,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-07-24 12:50:08,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 167 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:50:08,438 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:50:08,438 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:50:08,438 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:50:08,439 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:50:08,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:50:08,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:50:08,440 INFO L87 Difference]: Start difference. First operand 161188 states and 190499 transitions. Second operand 5 states. [2018-07-24 12:50:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:12,605 INFO L93 Difference]: Finished difference Result 310814 states and 366736 transitions. [2018-07-24 12:50:12,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:50:12,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 348 [2018-07-24 12:50:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:13,004 INFO L225 Difference]: With dead ends: 310814 [2018-07-24 12:50:13,005 INFO L226 Difference]: Without dead ends: 154766 [2018-07-24 12:50:13,228 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 691 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:50:13,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154766 states. [2018-07-24 12:50:16,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154766 to 153466. [2018-07-24 12:50:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153466 states. [2018-07-24 12:50:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153466 states to 153466 states and 179421 transitions. [2018-07-24 12:50:16,385 INFO L78 Accepts]: Start accepts. Automaton has 153466 states and 179421 transitions. Word has length 348 [2018-07-24 12:50:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:16,386 INFO L471 AbstractCegarLoop]: Abstraction has 153466 states and 179421 transitions. [2018-07-24 12:50:16,386 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:50:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 153466 states and 179421 transitions. [2018-07-24 12:50:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-07-24 12:50:16,503 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:16,504 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:16,504 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1823836311, now seen corresponding path program 1 times [2018-07-24 12:50:16,504 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:16,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:16,506 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:17,219 WARN L169 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:50:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:17,345 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:17,345 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:17,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:17,353 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:17,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:50:18,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:50:18,325 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:50:18,325 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 12:50:18,325 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:50:18,326 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:50:18,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:50:18,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:50:18,327 INFO L87 Difference]: Start difference. First operand 153466 states and 179421 transitions. Second operand 3 states. [2018-07-24 12:50:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:21,203 INFO L93 Difference]: Finished difference Result 277997 states and 323890 transitions. [2018-07-24 12:50:21,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:50:21,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 356 [2018-07-24 12:50:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:21,483 INFO L225 Difference]: With dead ends: 277997 [2018-07-24 12:50:21,483 INFO L226 Difference]: Without dead ends: 110468 [2018-07-24 12:50:21,703 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:50:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110468 states. [2018-07-24 12:50:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110468 to 108322. [2018-07-24 12:50:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108322 states. [2018-07-24 12:50:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108322 states to 108322 states and 117365 transitions. [2018-07-24 12:50:27,648 INFO L78 Accepts]: Start accepts. Automaton has 108322 states and 117365 transitions. Word has length 356 [2018-07-24 12:50:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:27,649 INFO L471 AbstractCegarLoop]: Abstraction has 108322 states and 117365 transitions. [2018-07-24 12:50:27,650 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:50:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 108322 states and 117365 transitions. [2018-07-24 12:50:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-07-24 12:50:27,710 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:27,710 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:27,711 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1869400866, now seen corresponding path program 1 times [2018-07-24 12:50:27,711 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:27,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:27,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:27,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:27,712 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:28,345 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:50:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 247 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 12:50:28,515 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:28,515 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:28,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:28,524 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:28,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 320 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:50:29,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 288 proven. 38 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:50:29,467 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:29,467 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:50:29,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:29,482 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:30,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:30,887 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2018-07-24 12:50:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 137 proven. 11 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-24 12:50:31,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:32,003 WARN L169 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-07-24 12:50:32,698 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-07-24 12:50:33,281 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-07-24 12:50:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 201 proven. 85 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 12:50:33,766 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:50:33,767 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 10, 11] total 33 [2018-07-24 12:50:33,767 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:50:33,768 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:50:33,768 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:50:33,768 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 12:50:33,768 INFO L87 Difference]: Start difference. First operand 108322 states and 117365 transitions. Second operand 13 states. [2018-07-24 12:50:43,019 WARN L169 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-24 12:50:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:50:48,468 INFO L93 Difference]: Finished difference Result 218341 states and 248056 transitions. [2018-07-24 12:50:48,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-24 12:50:48,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 370 [2018-07-24 12:50:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:50:49,160 INFO L225 Difference]: With dead ends: 218341 [2018-07-24 12:50:49,160 INFO L226 Difference]: Without dead ends: 124841 [2018-07-24 12:50:49,393 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1495 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1131, Invalid=6701, Unknown=0, NotChecked=0, Total=7832 [2018-07-24 12:50:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124841 states. [2018-07-24 12:50:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124841 to 116292. [2018-07-24 12:50:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116292 states. [2018-07-24 12:50:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116292 states to 116292 states and 125320 transitions. [2018-07-24 12:50:52,004 INFO L78 Accepts]: Start accepts. Automaton has 116292 states and 125320 transitions. Word has length 370 [2018-07-24 12:50:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:50:52,004 INFO L471 AbstractCegarLoop]: Abstraction has 116292 states and 125320 transitions. [2018-07-24 12:50:52,004 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:50:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 116292 states and 125320 transitions. [2018-07-24 12:50:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-07-24 12:50:52,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:50:52,069 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:50:52,070 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:50:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash -292638590, now seen corresponding path program 1 times [2018-07-24 12:50:52,070 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:50:52,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:52,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:52,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:50:52,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:50:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 338 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:50:52,547 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:52,547 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:50:52,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:52,556 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:52,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:50:53,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:50:53,905 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:50:53,905 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:50:53,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:50:53,920 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:50:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:50:54,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:50:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:50:54,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:50:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:50:55,194 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:50:55,194 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 17 [2018-07-24 12:50:55,194 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:50:55,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:50:55,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:50:55,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:50:55,195 INFO L87 Difference]: Start difference. First operand 116292 states and 125320 transitions. Second operand 13 states. [2018-07-24 12:51:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:08,527 INFO L93 Difference]: Finished difference Result 314279 states and 357624 transitions. [2018-07-24 12:51:08,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-24 12:51:08,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 395 [2018-07-24 12:51:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:09,386 INFO L225 Difference]: With dead ends: 314279 [2018-07-24 12:51:09,387 INFO L226 Difference]: Without dead ends: 210005 [2018-07-24 12:51:09,636 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1642 GetRequests, 1592 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2018-07-24 12:51:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210005 states. [2018-07-24 12:51:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210005 to 206390. [2018-07-24 12:51:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206390 states. [2018-07-24 12:51:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206390 states to 206390 states and 233681 transitions. [2018-07-24 12:51:15,796 INFO L78 Accepts]: Start accepts. Automaton has 206390 states and 233681 transitions. Word has length 395 [2018-07-24 12:51:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:15,796 INFO L471 AbstractCegarLoop]: Abstraction has 206390 states and 233681 transitions. [2018-07-24 12:51:15,796 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:51:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 206390 states and 233681 transitions. [2018-07-24 12:51:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-07-24 12:51:16,009 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:16,009 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:51:16,009 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1010074421, now seen corresponding path program 1 times [2018-07-24 12:51:16,010 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:16,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:16,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:16,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:16,011 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 333 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-07-24 12:51:16,885 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:16,885 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:51:16,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:16,899 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:17,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-07-24 12:51:17,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 333 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-07-24 12:51:17,719 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:17,719 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 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 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:51:17,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:17,736 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:18,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-07-24 12:51:19,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 333 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-07-24 12:51:19,603 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:19,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 12:51:19,604 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:19,605 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:51:19,605 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:51:19,605 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:51:19,605 INFO L87 Difference]: Start difference. First operand 206390 states and 233681 transitions. Second operand 9 states. [2018-07-24 12:51:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:29,186 INFO L93 Difference]: Finished difference Result 377561 states and 429410 transitions. [2018-07-24 12:51:29,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-24 12:51:29,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 410 [2018-07-24 12:51:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:29,798 INFO L225 Difference]: With dead ends: 377561 [2018-07-24 12:51:29,798 INFO L226 Difference]: Without dead ends: 200709 [2018-07-24 12:51:30,121 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1682 GetRequests, 1648 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 12:51:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200709 states. [2018-07-24 12:51:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200709 to 196327. [2018-07-24 12:51:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196327 states. [2018-07-24 12:51:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196327 states to 196327 states and 217761 transitions. [2018-07-24 12:51:34,970 INFO L78 Accepts]: Start accepts. Automaton has 196327 states and 217761 transitions. Word has length 410 [2018-07-24 12:51:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:34,971 INFO L471 AbstractCegarLoop]: Abstraction has 196327 states and 217761 transitions. [2018-07-24 12:51:34,971 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:51:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 196327 states and 217761 transitions. [2018-07-24 12:51:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-07-24 12:51:35,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:35,160 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:35,161 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1703174596, now seen corresponding path program 1 times [2018-07-24 12:51:35,161 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:35,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:35,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:35,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:35,162 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 278 proven. 44 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-07-24 12:51:35,531 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:35,532 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:51:35,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:35,540 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:35,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:36,767 WARN L169 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-07-24 12:51:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 373 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:51:36,879 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 373 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:51:37,271 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:37,272 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 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 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:51:37,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:37,288 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:38,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 373 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:51:38,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 373 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:51:38,568 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:38,569 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:51:38,569 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:38,570 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:51:38,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:51:38,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:51:38,570 INFO L87 Difference]: Start difference. First operand 196327 states and 217761 transitions. Second operand 9 states. Received shutdown request... [2018-07-24 12:51:45,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-24 12:51:45,422 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:51:45,427 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:51:45,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:51:45 BoogieIcfgContainer [2018-07-24 12:51:45,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:51:45,429 INFO L168 Benchmark]: Toolchain (without parser) took 214575.45 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 4.1 GB in the end (delta: -2.7 GB). Peak memory consumption was 449.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:45,431 INFO L168 Benchmark]: CDTParser took 0.24 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. [2018-07-24 12:51:45,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1023.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:45,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 136.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:45,433 INFO L168 Benchmark]: Boogie Preprocessor took 399.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -914.1 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:45,433 INFO L168 Benchmark]: RCFGBuilder took 5991.43 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: 282.3 MB). Peak memory consumption was 282.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:45,434 INFO L168 Benchmark]: TraceAbstraction took 207015.03 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 4.1 GB in the end (delta: -2.2 GB). Peak memory consumption was 192.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:51:45,440 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1023.14 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 136.32 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 399.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -914.1 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5991.43 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: 282.3 MB). Peak memory consumption was 282.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207015.03 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 4.1 GB in the end (delta: -2.2 GB). Peak memory consumption was 192.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1524]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1524). Cancelled while BasicCegarLoop was constructing difference of abstraction (196327states) and interpolant automaton (currently 32 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (38669 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 206.8s OverallTime, 18 OverallIterations, 5 TraceHistogramMax, 125.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5639 SDtfs, 31577 SDslu, 9576 SDs, 0 SdLazy, 51047 SolverSat, 9351 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16998 GetRequests, 16461 SyntacticMatches, 38 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8810 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206390occurred in iteration=16, 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: 37.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 33794 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.3s SsaConstructionTime, 10.9s SatisfiabilityAnalysisTime, 26.5s InterpolantComputationTime, 13559 NumberOfCodeBlocks, 13559 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 21684 ConstructedInterpolants, 0 QuantifiedInterpolants, 19090559 SizeOfPredicates, 107 NumberOfNonLiveVariables, 31383 ConjunctsInSsa, 378 ConjunctsInUnsatCore, 68 InterpolantComputations, 10 PerfectInterpolantSequences, 14446/15495 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_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-51-45-453.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-51-45-453.csv Completed graceful shutdown