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/Problem15_label29_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:10:09,864 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:10:09,866 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:10:09,878 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:10:09,879 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:10:09,880 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:10:09,881 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:10:09,883 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:10:09,884 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:10:09,885 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:10:09,886 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:10:09,886 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:10:09,887 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:10:09,888 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:10:09,889 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:10:09,890 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:10:09,890 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:10:09,892 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:10:09,894 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:10:09,896 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:10:09,897 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:10:09,898 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:10:09,900 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:10:09,901 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:10:09,901 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:10:09,902 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:10:09,903 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:10:09,904 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:10:09,905 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:10:09,906 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:10:09,906 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:10:09,907 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:10:09,907 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:10:09,907 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:10:09,908 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:10:09,909 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:10:09,909 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 12:10:09,926 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:10:09,926 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:10:09,927 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:10:09,927 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:10:09,927 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:10:09,927 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:10:09,927 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:10:09,928 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:10:09,928 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:10:09,928 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:10:09,928 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:10:09,929 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:10:09,929 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:10:09,929 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:10:09,929 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:10:09,930 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:10:09,930 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:10:09,930 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:10:09,930 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:10:09,930 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:10:09,931 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:10:09,931 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:10:09,931 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:10:09,931 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:10:09,931 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:10:09,932 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:10:09,932 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:10:09,932 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:10:09,932 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:10:09,932 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:10:09,933 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:10:09,933 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:10:09,933 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:10:09,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:10:09,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:10:10,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:10:10,001 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:10:10,001 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:10:10,002 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label29_false-unreach-call.c [2018-07-24 12:10:10,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf65e242e/70c359358a1448a4a9ab55d06035e30f/FLAGe18792bc7 [2018-07-24 12:10:10,724 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:10:10,725 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label29_false-unreach-call.c [2018-07-24 12:10:10,750 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf65e242e/70c359358a1448a4a9ab55d06035e30f/FLAGe18792bc7 [2018-07-24 12:10:10,765 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf65e242e/70c359358a1448a4a9ab55d06035e30f [2018-07-24 12:10:10,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:10:10,777 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:10:10,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:10:10,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:10:10,785 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:10:10,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:10:10" (1/1) ... [2018-07-24 12:10:10,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3819ccc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:10, skipping insertion in model container [2018-07-24 12:10:10,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:10:10" (1/1) ... [2018-07-24 12:10:11,028 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:10:11,606 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:10:11,623 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:10:11,929 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:10:12,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12 WrapperNode [2018-07-24 12:10:12,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:10:12,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:10:12,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:10:12,086 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:10:12,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:10:12,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:10:12,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:10:12,350 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:10:12,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (1/1) ... [2018-07-24 12:10:12,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:10:12,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:10:12,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:10:12,956 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:10:12,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (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 12:10:13,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:10:13,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:10:13,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:10:13,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:10:13,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:10:13,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:10:13,024 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:10:13,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:10:13,024 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:10:13,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:10:20,812 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:10:20,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:10:20 BoogieIcfgContainer [2018-07-24 12:10:20,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:10:20,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:10:20,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:10:20,818 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:10:20,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:10:10" (1/3) ... [2018-07-24 12:10:20,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382dce4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:10:20, skipping insertion in model container [2018-07-24 12:10:20,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:10:12" (2/3) ... [2018-07-24 12:10:20,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382dce4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:10:20, skipping insertion in model container [2018-07-24 12:10:20,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:10:20" (3/3) ... [2018-07-24 12:10:20,821 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label29_false-unreach-call.c [2018-07-24 12:10:20,829 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:10:20,837 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:10:20,893 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:10:20,894 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:10:20,894 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:10:20,894 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:10:20,894 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:10:20,894 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:10:20,895 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:10:20,895 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:10:20,895 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:10:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 12:10:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-24 12:10:20,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:10:20,935 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] [2018-07-24 12:10:20,935 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:10:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2000297436, now seen corresponding path program 1 times [2018-07-24 12:10:20,943 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:10:20,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:20,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:10:20,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:20,990 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:10:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:10:21,411 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 12:10:21,413 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:10:21,414 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:10:21,414 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:10:21,419 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:10:21,431 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:10:21,431 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:10:21,434 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-07-24 12:10:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:10:30,152 INFO L93 Difference]: Finished difference Result 1550 states and 2835 transitions. [2018-07-24 12:10:30,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:10:30,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-07-24 12:10:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:10:30,186 INFO L225 Difference]: With dead ends: 1550 [2018-07-24 12:10:30,186 INFO L226 Difference]: Without dead ends: 1106 [2018-07-24 12:10:30,196 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:10:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2018-07-24 12:10:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 762. [2018-07-24 12:10:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-07-24 12:10:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1263 transitions. [2018-07-24 12:10:30,310 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1263 transitions. Word has length 28 [2018-07-24 12:10:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:10:30,311 INFO L471 AbstractCegarLoop]: Abstraction has 762 states and 1263 transitions. [2018-07-24 12:10:30,311 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:10:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1263 transitions. [2018-07-24 12:10:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-24 12:10:30,320 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:10:30,321 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:30,321 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:10:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash 217765290, now seen corresponding path program 1 times [2018-07-24 12:10:30,322 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:10:30,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:30,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:10:30,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:30,323 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:10:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:10:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:10:30,646 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:10:30,647 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:10:30,647 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:10:30,649 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:10:30,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:10:30,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:10:30,650 INFO L87 Difference]: Start difference. First operand 762 states and 1263 transitions. Second operand 6 states. [2018-07-24 12:10:38,019 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:10:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:10:41,474 INFO L93 Difference]: Finished difference Result 2247 states and 3761 transitions. [2018-07-24 12:10:41,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 12:10:41,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-07-24 12:10:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:10:41,490 INFO L225 Difference]: With dead ends: 2247 [2018-07-24 12:10:41,490 INFO L226 Difference]: Without dead ends: 1491 [2018-07-24 12:10:41,494 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:10:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2018-07-24 12:10:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1457. [2018-07-24 12:10:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1457 states. [2018-07-24 12:10:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2152 transitions. [2018-07-24 12:10:41,553 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2152 transitions. Word has length 101 [2018-07-24 12:10:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:10:41,553 INFO L471 AbstractCegarLoop]: Abstraction has 1457 states and 2152 transitions. [2018-07-24 12:10:41,554 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:10:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2152 transitions. [2018-07-24 12:10:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-24 12:10:41,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:10:41,557 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:41,557 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:10:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1630252698, now seen corresponding path program 1 times [2018-07-24 12:10:41,557 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:10:41,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:41,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:10:41,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:41,559 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:10:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:10:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:10:41,743 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:10:41,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:10:41,744 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:10:41,744 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:10:41,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:10:41,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:10:41,745 INFO L87 Difference]: Start difference. First operand 1457 states and 2152 transitions. Second operand 4 states. [2018-07-24 12:10:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:10:48,897 INFO L93 Difference]: Finished difference Result 5405 states and 8310 transitions. [2018-07-24 12:10:48,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:10:48,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2018-07-24 12:10:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:10:48,929 INFO L225 Difference]: With dead ends: 5405 [2018-07-24 12:10:48,929 INFO L226 Difference]: Without dead ends: 3954 [2018-07-24 12:10:48,943 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:10:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2018-07-24 12:10:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3951. [2018-07-24 12:10:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3951 states. [2018-07-24 12:10:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 5460 transitions. [2018-07-24 12:10:49,061 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 5460 transitions. Word has length 109 [2018-07-24 12:10:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:10:49,062 INFO L471 AbstractCegarLoop]: Abstraction has 3951 states and 5460 transitions. [2018-07-24 12:10:49,062 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:10:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 5460 transitions. [2018-07-24 12:10:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-24 12:10:49,066 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:10:49,066 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:49,066 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:10:49,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2021537488, now seen corresponding path program 1 times [2018-07-24 12:10:49,067 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:10:49,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:49,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:10:49,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:49,068 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:10:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:10:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:10:49,416 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:10:49,416 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:10:49,416 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:10:49,417 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:10:49,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:10:49,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:10:49,418 INFO L87 Difference]: Start difference. First operand 3951 states and 5460 transitions. Second operand 6 states. [2018-07-24 12:10:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:10:55,089 INFO L93 Difference]: Finished difference Result 9149 states and 12436 transitions. [2018-07-24 12:10:55,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:10:55,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2018-07-24 12:10:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:10:55,116 INFO L225 Difference]: With dead ends: 9149 [2018-07-24 12:10:55,117 INFO L226 Difference]: Without dead ends: 5204 [2018-07-24 12:10:55,140 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:10:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2018-07-24 12:10:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 5146. [2018-07-24 12:10:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5146 states. [2018-07-24 12:10:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 6609 transitions. [2018-07-24 12:10:55,282 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 6609 transitions. Word has length 115 [2018-07-24 12:10:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:10:55,283 INFO L471 AbstractCegarLoop]: Abstraction has 5146 states and 6609 transitions. [2018-07-24 12:10:55,283 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:10:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 6609 transitions. [2018-07-24 12:10:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-24 12:10:55,287 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:10:55,287 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:55,287 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:10:55,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1765322910, now seen corresponding path program 1 times [2018-07-24 12:10:55,289 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:10:55,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:55,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:10:55,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:10:55,290 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:10:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:10:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:10:55,884 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:10:55,884 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 12:10:55,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:10:55,896 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:10:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:10:55,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:10:56,518 WARN L169 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-07-24 12:10:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:10:56,542 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:10:56,936 WARN L169 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-07-24 12:10:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:10:58,057 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:10:58,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2018-07-24 12:10:58,057 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:10:58,058 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:10:58,063 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:10:58,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:10:58,064 INFO L87 Difference]: Start difference. First operand 5146 states and 6609 transitions. Second operand 5 states. [2018-07-24 12:11:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:11:13,299 INFO L93 Difference]: Finished difference Result 13742 states and 18096 transitions. [2018-07-24 12:11:13,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:11:13,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2018-07-24 12:11:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:11:13,345 INFO L225 Difference]: With dead ends: 13742 [2018-07-24 12:11:13,345 INFO L226 Difference]: Without dead ends: 8602 [2018-07-24 12:11:13,367 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:11:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8602 states. [2018-07-24 12:11:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8602 to 8118. [2018-07-24 12:11:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8118 states. [2018-07-24 12:11:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 10577 transitions. [2018-07-24 12:11:13,573 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 10577 transitions. Word has length 140 [2018-07-24 12:11:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:11:13,573 INFO L471 AbstractCegarLoop]: Abstraction has 8118 states and 10577 transitions. [2018-07-24 12:11:13,574 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:11:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 10577 transitions. [2018-07-24 12:11:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-24 12:11:13,578 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:11:13,578 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:11:13,579 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:11:13,579 INFO L82 PathProgramCache]: Analyzing trace with hash 323792521, now seen corresponding path program 1 times [2018-07-24 12:11:13,579 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:11:13,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:11:13,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:11:13,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:11:13,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:11:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:11:14,355 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-07-24 12:11:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:11:14,396 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:11:14,397 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 12:11:14,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:11:14,414 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:11:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:11:14,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:11:15,395 WARN L169 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 12:11:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:11:15,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:11:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:11:16,405 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:11:16,405 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2018-07-24 12:11:16,405 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:11:16,406 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:11:16,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:11:16,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:11:16,406 INFO L87 Difference]: Start difference. First operand 8118 states and 10577 transitions. Second operand 5 states. [2018-07-24 12:11:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:11:30,231 INFO L93 Difference]: Finished difference Result 19127 states and 24944 transitions. [2018-07-24 12:11:30,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:11:30,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2018-07-24 12:11:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:11:30,274 INFO L225 Difference]: With dead ends: 19127 [2018-07-24 12:11:30,274 INFO L226 Difference]: Without dead ends: 11015 [2018-07-24 12:11:30,303 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:11:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11015 states. [2018-07-24 12:11:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11015 to 10089. [2018-07-24 12:11:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10089 states. [2018-07-24 12:11:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10089 states to 10089 states and 12975 transitions. [2018-07-24 12:11:30,537 INFO L78 Accepts]: Start accepts. Automaton has 10089 states and 12975 transitions. Word has length 173 [2018-07-24 12:11:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:11:30,538 INFO L471 AbstractCegarLoop]: Abstraction has 10089 states and 12975 transitions. [2018-07-24 12:11:30,538 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:11:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 10089 states and 12975 transitions. [2018-07-24 12:11:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-24 12:11:30,542 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:11:30,542 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:11:30,543 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:11:30,543 INFO L82 PathProgramCache]: Analyzing trace with hash -618780793, now seen corresponding path program 1 times [2018-07-24 12:11:30,543 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:11:30,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:11:30,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:11:30,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:11:30,544 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:11:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:11:31,616 WARN L169 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:11:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 49 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:11:31,875 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:11:31,875 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 12:11:31,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:11:31,883 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:11:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:11:31,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:11:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 97 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:11:32,435 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:11:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 47 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:11:32,939 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:11:32,939 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 12:11:32,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:11:32,960 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:11:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:11:33,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:11:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 47 proven. 41 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 12:11:33,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:11:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 47 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:11:34,040 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:11:34,040 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 12:11:34,040 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:11:34,041 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:11:34,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:11:34,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:11:34,042 INFO L87 Difference]: Start difference. First operand 10089 states and 12975 transitions. Second operand 14 states. [2018-07-24 12:12:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:06,969 INFO L93 Difference]: Finished difference Result 28961 states and 38444 transitions. [2018-07-24 12:12:06,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 12:12:06,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 236 [2018-07-24 12:12:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:07,033 INFO L225 Difference]: With dead ends: 28961 [2018-07-24 12:12:07,033 INFO L226 Difference]: Without dead ends: 18256 [2018-07-24 12:12:07,061 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 926 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=802, Invalid=2620, Unknown=0, NotChecked=0, Total=3422 [2018-07-24 12:12:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18256 states. [2018-07-24 12:12:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18256 to 16772. [2018-07-24 12:12:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16772 states. [2018-07-24 12:12:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16772 states to 16772 states and 21748 transitions. [2018-07-24 12:12:07,482 INFO L78 Accepts]: Start accepts. Automaton has 16772 states and 21748 transitions. Word has length 236 [2018-07-24 12:12:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:07,482 INFO L471 AbstractCegarLoop]: Abstraction has 16772 states and 21748 transitions. [2018-07-24 12:12:07,482 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:12:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 16772 states and 21748 transitions. [2018-07-24 12:12:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-07-24 12:12:07,491 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:07,492 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:12:07,492 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:12:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1958246724, now seen corresponding path program 1 times [2018-07-24 12:12:07,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:07,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:07,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:07,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:07,494 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:08,631 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:12:09,155 WARN L169 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-07-24 12:12:09,516 WARN L169 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:12:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:09,918 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:09,919 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 12:12:09,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:09,928 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:10,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 97 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:10,469 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 47 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:11,169 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:11,169 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 12:12:11,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:11,185 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:11,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 47 proven. 57 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 12:12:11,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 47 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (7)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 12:12:12,467 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:12:12,467 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 12:12:12,467 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:12:12,468 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:12:12,468 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:12:12,469 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:12:12,469 INFO L87 Difference]: Start difference. First operand 16772 states and 21748 transitions. Second operand 14 states. [2018-07-24 12:12:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:50,968 INFO L93 Difference]: Finished difference Result 36459 states and 47999 transitions. [2018-07-24 12:12:50,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-24 12:12:50,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 321 [2018-07-24 12:12:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:51,033 INFO L225 Difference]: With dead ends: 36459 [2018-07-24 12:12:51,033 INFO L226 Difference]: Without dead ends: 19006 [2018-07-24 12:12:51,069 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1331 GetRequests, 1263 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=862, Invalid=2798, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 12:12:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19006 states. [2018-07-24 12:12:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19006 to 17406. [2018-07-24 12:12:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17406 states. [2018-07-24 12:12:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17406 states to 17406 states and 22220 transitions. [2018-07-24 12:12:51,433 INFO L78 Accepts]: Start accepts. Automaton has 17406 states and 22220 transitions. Word has length 321 [2018-07-24 12:12:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:51,434 INFO L471 AbstractCegarLoop]: Abstraction has 17406 states and 22220 transitions. [2018-07-24 12:12:51,434 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:12:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 17406 states and 22220 transitions. [2018-07-24 12:12:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-07-24 12:12:51,446 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:51,446 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:12:51,447 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:12:51,447 INFO L82 PathProgramCache]: Analyzing trace with hash -866147110, now seen corresponding path program 1 times [2018-07-24 12:12:51,447 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:51,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:51,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:51,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:51,448 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 24 proven. 124 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:12:52,691 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:52,691 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 12:12:52,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:52,700 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:52,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:52,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:53,280 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:53,280 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 12:12:53,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:53,296 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:53,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:12:53,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:12:54,533 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:12:54,533 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5, 5, 5] total 17 [2018-07-24 12:12:54,533 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:54,534 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:12:54,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:12:54,534 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:12:54,535 INFO L87 Difference]: Start difference. First operand 17406 states and 22220 transitions. Second operand 5 states. [2018-07-24 12:13:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:02,829 INFO L93 Difference]: Finished difference Result 42475 states and 55874 transitions. [2018-07-24 12:13:02,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:13:02,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 378 [2018-07-24 12:13:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:02,901 INFO L225 Difference]: With dead ends: 42475 [2018-07-24 12:13:02,901 INFO L226 Difference]: Without dead ends: 25386 [2018-07-24 12:13:02,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1504 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:13:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25386 states. [2018-07-24 12:13:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25386 to 23967. [2018-07-24 12:13:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23967 states. [2018-07-24 12:13:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23967 states to 23967 states and 30560 transitions. [2018-07-24 12:13:03,423 INFO L78 Accepts]: Start accepts. Automaton has 23967 states and 30560 transitions. Word has length 378 [2018-07-24 12:13:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:03,423 INFO L471 AbstractCegarLoop]: Abstraction has 23967 states and 30560 transitions. [2018-07-24 12:13:03,424 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:13:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23967 states and 30560 transitions. [2018-07-24 12:13:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-07-24 12:13:03,439 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:03,439 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:13:03,439 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:13:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -951701043, now seen corresponding path program 1 times [2018-07-24 12:13:03,440 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:03,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:03,441 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:04,137 WARN L169 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 8 [2018-07-24 12:13:04,597 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 3 [2018-07-24 12:13:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 47 proven. 131 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:13:05,649 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:05,649 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:13:05,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:05,657 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:05,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:13:06,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:13:06,420 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:06,420 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 12:13:06,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:06,437 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:06,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-07-24 12:13:06,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-07-24 12:13:07,845 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:13:07,846 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5, 5, 5] total 17 [2018-07-24 12:13:07,846 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:07,847 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:13:07,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:13:07,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:13:07,847 INFO L87 Difference]: Start difference. First operand 23967 states and 30560 transitions. Second operand 5 states. [2018-07-24 12:13:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:13,456 INFO L93 Difference]: Finished difference Result 51460 states and 66687 transitions. [2018-07-24 12:13:13,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:13:13,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2018-07-24 12:13:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:13,526 INFO L225 Difference]: With dead ends: 51460 [2018-07-24 12:13:13,526 INFO L226 Difference]: Without dead ends: 27810 [2018-07-24 12:13:13,586 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1657 GetRequests, 1632 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:13:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27810 states. [2018-07-24 12:13:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27810 to 26776. [2018-07-24 12:13:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26776 states. [2018-07-24 12:13:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26776 states to 26776 states and 32409 transitions. [2018-07-24 12:13:14,062 INFO L78 Accepts]: Start accepts. Automaton has 26776 states and 32409 transitions. Word has length 411 [2018-07-24 12:13:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:14,063 INFO L471 AbstractCegarLoop]: Abstraction has 26776 states and 32409 transitions. [2018-07-24 12:13:14,063 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:13:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 26776 states and 32409 transitions. [2018-07-24 12:13:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-07-24 12:13:14,076 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:14,076 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:13:14,076 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:13:14,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1629944380, now seen corresponding path program 1 times [2018-07-24 12:13:14,077 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:14,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:14,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:14,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:14,078 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 24 proven. 124 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:13:14,688 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:14,688 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 12:13:14,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:14,695 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:14,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:15,280 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:15,455 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:13:15,456 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 12:13:15,456 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:15,456 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:13:15,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:13:15,456 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:13:15,457 INFO L87 Difference]: Start difference. First operand 26776 states and 32409 transitions. Second operand 3 states. [2018-07-24 12:13:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:24,825 INFO L93 Difference]: Finished difference Result 58017 states and 72255 transitions. [2018-07-24 12:13:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:13:24,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 415 [2018-07-24 12:13:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:24,912 INFO L225 Difference]: With dead ends: 58017 [2018-07-24 12:13:24,912 INFO L226 Difference]: Without dead ends: 31568 [2018-07-24 12:13:24,971 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 833 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:13:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31568 states. [2018-07-24 12:13:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31568 to 31557. [2018-07-24 12:13:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31557 states. [2018-07-24 12:13:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31557 states to 31557 states and 38609 transitions. [2018-07-24 12:13:25,542 INFO L78 Accepts]: Start accepts. Automaton has 31557 states and 38609 transitions. Word has length 415 [2018-07-24 12:13:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:25,542 INFO L471 AbstractCegarLoop]: Abstraction has 31557 states and 38609 transitions. [2018-07-24 12:13:25,543 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:13:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 31557 states and 38609 transitions. [2018-07-24 12:13:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-07-24 12:13:25,567 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:25,568 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:13:25,568 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:13:25,568 INFO L82 PathProgramCache]: Analyzing trace with hash 563461135, now seen corresponding path program 1 times [2018-07-24 12:13:25,568 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:25,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:25,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:25,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:25,569 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-07-24 12:13:26,032 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:13:26,032 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:13:26,032 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:26,033 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:13:26,033 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:13:26,033 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:13:26,033 INFO L87 Difference]: Start difference. First operand 31557 states and 38609 transitions. Second operand 4 states. [2018-07-24 12:13:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:32,249 INFO L93 Difference]: Finished difference Result 92383 states and 117878 transitions. [2018-07-24 12:13:32,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:13:32,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2018-07-24 12:13:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:32,382 INFO L225 Difference]: With dead ends: 92383 [2018-07-24 12:13:32,383 INFO L226 Difference]: Without dead ends: 60215 [2018-07-24 12:13:32,486 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:13:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60215 states. [2018-07-24 12:13:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60215 to 58969. [2018-07-24 12:13:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58969 states. [2018-07-24 12:13:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58969 states to 58969 states and 70088 transitions. [2018-07-24 12:13:33,510 INFO L78 Accepts]: Start accepts. Automaton has 58969 states and 70088 transitions. Word has length 467 [2018-07-24 12:13:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:33,512 INFO L471 AbstractCegarLoop]: Abstraction has 58969 states and 70088 transitions. [2018-07-24 12:13:33,512 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:13:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58969 states and 70088 transitions. [2018-07-24 12:13:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-07-24 12:13:33,524 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:33,524 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:13:33,524 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:13:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1311814458, now seen corresponding path program 1 times [2018-07-24 12:13:33,525 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:33,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:33,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:33,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:33,526 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:33,909 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:33,909 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:13:33,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:33,917 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:34,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:34,993 WARN L169 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 41 [2018-07-24 12:13:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 196 proven. 24 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:35,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:35,325 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-07-24 12:13:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-24 12:13:35,581 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:13:35,582 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 6] total 10 [2018-07-24 12:13:35,582 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:35,583 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:13:35,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:13:35,583 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:13:35,583 INFO L87 Difference]: Start difference. First operand 58969 states and 70088 transitions. Second operand 3 states. [2018-07-24 12:13:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:39,661 INFO L93 Difference]: Finished difference Result 131084 states and 158841 transitions. [2018-07-24 12:13:39,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:13:39,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2018-07-24 12:13:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:39,826 INFO L225 Difference]: With dead ends: 131084 [2018-07-24 12:13:39,826 INFO L226 Difference]: Without dead ends: 72454 [2018-07-24 12:13:39,953 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:13:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72454 states. [2018-07-24 12:13:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72454 to 71895. [2018-07-24 12:13:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71895 states. [2018-07-24 12:13:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71895 states to 71895 states and 85084 transitions. [2018-07-24 12:13:41,006 INFO L78 Accepts]: Start accepts. Automaton has 71895 states and 85084 transitions. Word has length 492 [2018-07-24 12:13:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:41,007 INFO L471 AbstractCegarLoop]: Abstraction has 71895 states and 85084 transitions. [2018-07-24 12:13:41,007 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:13:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 71895 states and 85084 transitions. [2018-07-24 12:13:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2018-07-24 12:13:41,045 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:41,045 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:13:41,046 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:13:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash -785460872, now seen corresponding path program 1 times [2018-07-24 12:13:41,046 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:41,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:41,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:41,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:41,047 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 175 proven. 117 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2018-07-24 12:13:41,728 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:41,728 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 12:13:41,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:41,736 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:41,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:42,542 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:42,861 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:42,862 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 12:13:42,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:42,879 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:43,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:43,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:13:43,740 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:13:43,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 13 [2018-07-24 12:13:43,741 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:13:43,742 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:13:43,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:13:43,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:13:43,743 INFO L87 Difference]: Start difference. First operand 71895 states and 85084 transitions. Second operand 11 states. [2018-07-24 12:13:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:53,293 INFO L93 Difference]: Finished difference Result 143548 states and 172371 transitions. [2018-07-24 12:13:53,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 12:13:53,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 559 [2018-07-24 12:13:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:53,436 INFO L225 Difference]: With dead ends: 143548 [2018-07-24 12:13:53,436 INFO L226 Difference]: Without dead ends: 71992 [2018-07-24 12:13:53,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2275 GetRequests, 2242 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2018-07-24 12:13:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71992 states. [2018-07-24 12:13:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71992 to 69710. [2018-07-24 12:13:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69710 states. [2018-07-24 12:13:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69710 states to 69710 states and 78286 transitions. [2018-07-24 12:13:54,688 INFO L78 Accepts]: Start accepts. Automaton has 69710 states and 78286 transitions. Word has length 559 [2018-07-24 12:13:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:54,691 INFO L471 AbstractCegarLoop]: Abstraction has 69710 states and 78286 transitions. [2018-07-24 12:13:54,691 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:13:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 69710 states and 78286 transitions. [2018-07-24 12:13:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2018-07-24 12:13:54,716 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:54,717 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:13:54,717 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:13:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash -540991314, now seen corresponding path program 1 times [2018-07-24 12:13:54,718 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:54,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:54,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:54,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:54,719 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-07-24 12:13:55,219 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:13:55,219 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:13:55,219 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:55,220 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:13:55,220 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:13:55,220 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:13:55,220 INFO L87 Difference]: Start difference. First operand 69710 states and 78286 transitions. Second operand 4 states. [2018-07-24 12:14:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:00,166 INFO L93 Difference]: Finished difference Result 193390 states and 222515 transitions. [2018-07-24 12:14:00,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:14:00,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 605 [2018-07-24 12:14:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:00,400 INFO L225 Difference]: With dead ends: 193390 [2018-07-24 12:14:00,401 INFO L226 Difference]: Without dead ends: 100080 [2018-07-24 12:14:00,572 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:14:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100080 states. [2018-07-24 12:14:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100080 to 98571. [2018-07-24 12:14:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98571 states. [2018-07-24 12:14:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98571 states to 98571 states and 107515 transitions. [2018-07-24 12:14:01,785 INFO L78 Accepts]: Start accepts. Automaton has 98571 states and 107515 transitions. Word has length 605 [2018-07-24 12:14:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:01,785 INFO L471 AbstractCegarLoop]: Abstraction has 98571 states and 107515 transitions. [2018-07-24 12:14:01,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:14:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 98571 states and 107515 transitions. [2018-07-24 12:14:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2018-07-24 12:14:01,832 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:01,833 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:14:01,833 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:14:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2069788573, now seen corresponding path program 1 times [2018-07-24 12:14:01,834 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:01,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:01,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:01,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:01,835 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 573 proven. 2 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-07-24 12:14:03,454 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:03,454 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 12:14:03,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:03,462 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:03,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 573 proven. 2 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-07-24 12:14:04,222 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 573 proven. 2 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-07-24 12:14:04,877 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:04,878 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:14:04,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:04,894 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:05,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 573 proven. 2 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-07-24 12:14:06,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 573 proven. 2 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-07-24 12:14:06,538 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:14:06,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-07-24 12:14:06,539 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:14:06,541 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:14:06,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:14:06,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:14:06,542 INFO L87 Difference]: Start difference. First operand 98571 states and 107515 transitions. Second operand 7 states. Received shutdown request... [2018-07-24 12:14:10,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:14:10,279 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:14:10,286 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:14:10,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:14:10 BoogieIcfgContainer [2018-07-24 12:14:10,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:14:10,287 INFO L168 Benchmark]: Toolchain (without parser) took 239511.00 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -738.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-07-24 12:14:10,288 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:14:10,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1306.66 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:14:10,290 INFO L168 Benchmark]: Boogie Procedure Inliner took 263.84 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:14:10,290 INFO L168 Benchmark]: Boogie Preprocessor took 605.30 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 886.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:14:10,291 INFO L168 Benchmark]: RCFGBuilder took 7857.64 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 323.8 MB). Peak memory consumption was 323.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:14:10,292 INFO L168 Benchmark]: TraceAbstraction took 229472.55 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -187.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-07-24 12:14:10,296 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1306.66 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 263.84 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 605.30 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 886.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7857.64 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 323.8 MB). Peak memory consumption was 323.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229472.55 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -187.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 70). Cancelled while BasicCegarLoop was constructing difference of abstraction (98571states) and interpolant automaton (currently 8 states, 7 states before enhancement), while ReachableStatesComputation was computing reachable states (12668 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 229.4s OverallTime, 16 OverallIterations, 6 TraceHistogramMax, 186.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5722 SDtfs, 29047 SDslu, 4121 SDs, 0 SdLazy, 52499 SolverSat, 9707 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 160.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13368 GetRequests, 13079 SyntacticMatches, 43 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98571occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 12993 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 26.7s InterpolantComputationTime, 11878 NumberOfCodeBlocks, 11878 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 18392 ConstructedInterpolants, 50 QuantifiedInterpolants, 35674387 SizeOfPredicates, 43 NumberOfNonLiveVariables, 9746 ConjunctsInSsa, 182 ConjunctsInUnsatCore, 48 InterpolantComputations, 15 PerfectInterpolantSequences, 12173/13553 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/Problem15_label29_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-14-10-309.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label29_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-14-10-309.csv Completed graceful shutdown