java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label02_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:10:20,918 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:10:20,920 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:10:20,934 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:10:20,934 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:10:20,936 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:10:20,939 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:10:20,941 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:10:20,944 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:10:20,944 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:10:20,946 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:10:20,946 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:10:20,948 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:10:20,949 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:10:20,950 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:10:20,951 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:10:20,952 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:10:20,960 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:10:20,963 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:10:20,966 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:10:20,971 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:10:20,972 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:10:20,977 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 10:10:20,978 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 10:10:20,978 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 10:10:20,979 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 10:10:20,980 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 10:10:20,980 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 10:10:20,981 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 10:10:20,985 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 10:10:20,986 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 10:10:20,988 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 10:10:20,988 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 10:10:20,988 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 10:10:20,989 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 10:10:20,991 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 10:10:20,991 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 10:10:21,026 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:10:21,027 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:10:21,027 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:10:21,028 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:10:21,028 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:10:21,028 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:10:21,028 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:10:21,029 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:10:21,029 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:10:21,029 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:10:21,029 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:10:21,029 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:10:21,031 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:10:21,031 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:10:21,031 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:10:21,032 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:10:21,032 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:10:21,032 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:10:21,032 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:10:21,032 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:10:21,033 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:10:21,033 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:10:21,033 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:10:21,033 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:10:21,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:10:21,034 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:10:21,034 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:10:21,034 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:10:21,034 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:10:21,036 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:10:21,036 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:10:21,036 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:10:21,036 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:10:21,037 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:10:21,091 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:10:21,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:10:21,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:10:21,112 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:10:21,113 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:10:21,114 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label02_true-unreach-call.c [2018-09-18 10:10:21,470 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8024c56/662aaac2b3b1450d9e640360f1fdc886/FLAG72b6dec21 [2018-09-18 10:10:21,872 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:10:21,873 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label02_true-unreach-call.c [2018-09-18 10:10:21,896 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8024c56/662aaac2b3b1450d9e640360f1fdc886/FLAG72b6dec21 [2018-09-18 10:10:21,918 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8024c56/662aaac2b3b1450d9e640360f1fdc886 [2018-09-18 10:10:21,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:10:21,935 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:10:21,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:10:21,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:10:21,943 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:10:21,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:10:21" (1/1) ... [2018-09-18 10:10:21,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201dfe03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:21, skipping insertion in model container [2018-09-18 10:10:21,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:10:21" (1/1) ... [2018-09-18 10:10:21,960 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:10:22,659 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:10:22,678 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:10:22,900 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:10:22,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22 WrapperNode [2018-09-18 10:10:22,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:10:22,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:10:22,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:10:22,961 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:10:22,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:10:23,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:10:23,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:10:23,127 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:10:23,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... [2018-09-18 10:10:23,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:10:23,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:10:23,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:10:23,503 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:10:23,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:10:23,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:10:23,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:10:23,576 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:10:23,576 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:10:23,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:10:23,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:10:23,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:10:23,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:10:28,470 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:10:28,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:10:28 BoogieIcfgContainer [2018-09-18 10:10:28,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:10:28,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:10:28,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:10:28,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:10:28,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:10:21" (1/3) ... [2018-09-18 10:10:28,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:10:28, skipping insertion in model container [2018-09-18 10:10:28,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:22" (2/3) ... [2018-09-18 10:10:28,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544d6bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:10:28, skipping insertion in model container [2018-09-18 10:10:28,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:10:28" (3/3) ... [2018-09-18 10:10:28,480 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label02_true-unreach-call.c [2018-09-18 10:10:28,493 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:10:28,504 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:10:28,564 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:10:28,568 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:10:28,568 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:10:28,568 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:10:28,568 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:10:28,568 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:10:28,569 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:10:28,569 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:10:28,569 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:10:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:10:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-09-18 10:10:28,627 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:28,629 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:28,630 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:28,636 INFO L82 PathProgramCache]: Analyzing trace with hash -598377940, now seen corresponding path program 1 times [2018-09-18 10:10:28,640 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:28,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:28,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:28,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:28,703 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:29,582 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:10:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:29,816 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:29,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:10:29,817 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:29,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:29,839 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:29,840 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:29,843 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-18 10:10:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:31,630 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-09-18 10:10:31,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:31,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2018-09-18 10:10:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:31,668 INFO L225 Difference]: With dead ends: 838 [2018-09-18 10:10:31,668 INFO L226 Difference]: Without dead ends: 524 [2018-09-18 10:10:31,682 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-09-18 10:10:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-09-18 10:10:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-09-18 10:10:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-09-18 10:10:31,798 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 211 [2018-09-18 10:10:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:31,804 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-09-18 10:10:31,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-09-18 10:10:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-09-18 10:10:31,825 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:31,825 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:31,826 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:31,826 INFO L82 PathProgramCache]: Analyzing trace with hash 500762469, now seen corresponding path program 1 times [2018-09-18 10:10:31,830 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:31,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:31,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:31,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:31,832 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:32,257 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:32,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:10:32,257 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:32,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:10:32,260 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:10:32,260 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:10:32,260 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-09-18 10:10:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:36,435 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-09-18 10:10:36,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 10:10:36,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 221 [2018-09-18 10:10:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:36,458 INFO L225 Difference]: With dead ends: 1581 [2018-09-18 10:10:36,459 INFO L226 Difference]: Without dead ends: 1065 [2018-09-18 10:10:36,463 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:10:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-09-18 10:10:36,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-09-18 10:10:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-09-18 10:10:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-09-18 10:10:36,537 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 221 [2018-09-18 10:10:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:36,538 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-09-18 10:10:36,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:10:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-09-18 10:10:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-18 10:10:36,543 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:36,543 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:36,544 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1880963624, now seen corresponding path program 1 times [2018-09-18 10:10:36,544 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:36,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:36,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:36,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:36,546 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:36,868 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:36,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:10:36,868 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:36,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:36,870 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:36,871 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:36,871 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-09-18 10:10:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:39,470 INFO L93 Difference]: Finished difference Result 2901 states and 5098 transitions. [2018-09-18 10:10:39,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:39,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2018-09-18 10:10:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:39,488 INFO L225 Difference]: With dead ends: 2901 [2018-09-18 10:10:39,488 INFO L226 Difference]: Without dead ends: 1884 [2018-09-18 10:10:39,494 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-18 10:10:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1864. [2018-09-18 10:10:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2018-09-18 10:10:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 3159 transitions. [2018-09-18 10:10:39,555 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 3159 transitions. Word has length 224 [2018-09-18 10:10:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:39,558 INFO L480 AbstractCegarLoop]: Abstraction has 1864 states and 3159 transitions. [2018-09-18 10:10:39,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 3159 transitions. [2018-09-18 10:10:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-18 10:10:39,570 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:39,571 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:39,571 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:39,571 INFO L82 PathProgramCache]: Analyzing trace with hash 651322454, now seen corresponding path program 1 times [2018-09-18 10:10:39,572 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:39,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:39,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:39,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:39,573 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:10:39,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:39,805 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:10:39,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:39,815 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:40,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 10:10:40,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:10:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:10:40,774 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:10:40,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2018-09-18 10:10:40,774 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:40,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:10:40,776 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:10:40,776 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:10:40,777 INFO L87 Difference]: Start difference. First operand 1864 states and 3159 transitions. Second operand 5 states. [2018-09-18 10:10:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:44,599 INFO L93 Difference]: Finished difference Result 6028 states and 10772 transitions. [2018-09-18 10:10:44,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:10:44,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 232 [2018-09-18 10:10:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:44,642 INFO L225 Difference]: With dead ends: 6028 [2018-09-18 10:10:44,642 INFO L226 Difference]: Without dead ends: 4170 [2018-09-18 10:10:44,653 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 458 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:10:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2018-09-18 10:10:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3813. [2018-09-18 10:10:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2018-09-18 10:10:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6250 transitions. [2018-09-18 10:10:44,797 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6250 transitions. Word has length 232 [2018-09-18 10:10:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:44,798 INFO L480 AbstractCegarLoop]: Abstraction has 3813 states and 6250 transitions. [2018-09-18 10:10:44,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:10:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6250 transitions. [2018-09-18 10:10:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-18 10:10:44,814 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:44,814 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:44,815 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:44,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1307188554, now seen corresponding path program 1 times [2018-09-18 10:10:44,815 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:44,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:44,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:44,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:44,817 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:45,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:45,209 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:10:45,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:45,223 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:45,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-18 10:10:45,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:10:45,684 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 10:10:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-18 10:10:46,302 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:10:46,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:10:46,303 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:46,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:10:46,304 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:10:46,304 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:10:46,304 INFO L87 Difference]: Start difference. First operand 3813 states and 6250 transitions. Second operand 5 states. [2018-09-18 10:10:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:47,351 INFO L93 Difference]: Finished difference Result 11434 states and 18968 transitions. [2018-09-18 10:10:47,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 10:10:47,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2018-09-18 10:10:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:47,398 INFO L225 Difference]: With dead ends: 11434 [2018-09-18 10:10:47,399 INFO L226 Difference]: Without dead ends: 7627 [2018-09-18 10:10:47,413 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 478 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:10:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7627 states. [2018-09-18 10:10:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7627 to 7619. [2018-09-18 10:10:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7619 states. [2018-09-18 10:10:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7619 states to 7619 states and 12660 transitions. [2018-09-18 10:10:47,639 INFO L78 Accepts]: Start accepts. Automaton has 7619 states and 12660 transitions. Word has length 243 [2018-09-18 10:10:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:47,639 INFO L480 AbstractCegarLoop]: Abstraction has 7619 states and 12660 transitions. [2018-09-18 10:10:47,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:10:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7619 states and 12660 transitions. [2018-09-18 10:10:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-18 10:10:47,670 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:47,670 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:47,670 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:47,671 INFO L82 PathProgramCache]: Analyzing trace with hash 987224918, now seen corresponding path program 1 times [2018-09-18 10:10:47,671 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:47,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:47,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:47,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:47,672 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:48,109 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 10:10:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 10:10:48,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:48,466 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:10:48,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:48,479 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:48,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 10:10:48,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:10:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 10:10:49,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:49,265 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-18 10:10:49,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:49,303 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:49,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 10:10:50,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:10:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 10:10:50,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:10:50,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 16 [2018-09-18 10:10:50,264 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:10:50,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 10:10:50,265 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 10:10:50,266 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-09-18 10:10:50,266 INFO L87 Difference]: Start difference. First operand 7619 states and 12660 transitions. Second operand 10 states. [2018-09-18 10:10:51,443 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2018-09-18 10:11:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:05,810 INFO L93 Difference]: Finished difference Result 25856 states and 60229 transitions. [2018-09-18 10:11:05,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-18 10:11:05,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 258 [2018-09-18 10:11:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:06,019 INFO L225 Difference]: With dead ends: 25856 [2018-09-18 10:11:06,019 INFO L226 Difference]: Without dead ends: 18243 [2018-09-18 10:11:06,125 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1121 GetRequests, 1063 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=625, Invalid=2681, Unknown=0, NotChecked=0, Total=3306 [2018-09-18 10:11:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18243 states. [2018-09-18 10:11:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18243 to 17069. [2018-09-18 10:11:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17069 states. [2018-09-18 10:11:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17069 states to 17069 states and 27552 transitions. [2018-09-18 10:11:07,132 INFO L78 Accepts]: Start accepts. Automaton has 17069 states and 27552 transitions. Word has length 258 [2018-09-18 10:11:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:07,133 INFO L480 AbstractCegarLoop]: Abstraction has 17069 states and 27552 transitions. [2018-09-18 10:11:07,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 10:11:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 17069 states and 27552 transitions. [2018-09-18 10:11:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-09-18 10:11:07,259 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:07,259 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:07,260 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1956908726, now seen corresponding path program 1 times [2018-09-18 10:11:07,260 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:07,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:07,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:07,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:07,262 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:08,113 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-18 10:11:08,347 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-18 10:11:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:11:08,559 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:11:08,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:11:08,559 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:08,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:11:08,560 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:11:08,560 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:11:08,560 INFO L87 Difference]: Start difference. First operand 17069 states and 27552 transitions. Second operand 6 states. [2018-09-18 10:11:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:11,093 INFO L93 Difference]: Finished difference Result 36794 states and 59058 transitions. [2018-09-18 10:11:11,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 10:11:11,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 259 [2018-09-18 10:11:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:11,190 INFO L225 Difference]: With dead ends: 36794 [2018-09-18 10:11:11,191 INFO L226 Difference]: Without dead ends: 20989 [2018-09-18 10:11:11,239 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:11:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20989 states. [2018-09-18 10:11:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20989 to 19580. [2018-09-18 10:11:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19580 states. [2018-09-18 10:11:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19580 states to 19580 states and 30652 transitions. [2018-09-18 10:11:11,877 INFO L78 Accepts]: Start accepts. Automaton has 19580 states and 30652 transitions. Word has length 259 [2018-09-18 10:11:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:11,877 INFO L480 AbstractCegarLoop]: Abstraction has 19580 states and 30652 transitions. [2018-09-18 10:11:11,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:11:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 19580 states and 30652 transitions. [2018-09-18 10:11:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-09-18 10:11:11,978 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:11,979 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:11:11,979 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1644894672, now seen corresponding path program 1 times [2018-09-18 10:11:11,979 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:11,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:11,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:11,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:11,981 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:12,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:12,527 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:12,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:12,543 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:12,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:11:13,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:11:13,228 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:11:13,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-09-18 10:11:13,228 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:13,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:11:13,229 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:11:13,229 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:11:13,229 INFO L87 Difference]: Start difference. First operand 19580 states and 30652 transitions. Second operand 5 states. [2018-09-18 10:11:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:15,714 INFO L93 Difference]: Finished difference Result 58520 states and 97031 transitions. [2018-09-18 10:11:15,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:11:15,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 281 [2018-09-18 10:11:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:15,939 INFO L225 Difference]: With dead ends: 58520 [2018-09-18 10:11:15,940 INFO L226 Difference]: Without dead ends: 38976 [2018-09-18 10:11:16,030 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 554 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:11:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38976 states. [2018-09-18 10:11:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38976 to 36611. [2018-09-18 10:11:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36611 states. [2018-09-18 10:11:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36611 states to 36611 states and 57525 transitions. [2018-09-18 10:11:17,251 INFO L78 Accepts]: Start accepts. Automaton has 36611 states and 57525 transitions. Word has length 281 [2018-09-18 10:11:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:17,252 INFO L480 AbstractCegarLoop]: Abstraction has 36611 states and 57525 transitions. [2018-09-18 10:11:17,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:11:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 36611 states and 57525 transitions. [2018-09-18 10:11:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-09-18 10:11:17,381 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:17,382 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:17,382 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash -322085529, now seen corresponding path program 1 times [2018-09-18 10:11:17,382 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:17,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:17,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:17,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:17,384 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 98 proven. 17 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-09-18 10:11:17,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:17,973 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:17,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:17,983 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:18,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 79 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 10:11:18,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 10:11:19,130 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:11:19,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:11:19,130 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:19,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:11:19,131 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:11:19,131 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:11:19,132 INFO L87 Difference]: Start difference. First operand 36611 states and 57525 transitions. Second operand 5 states. [2018-09-18 10:11:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:21,756 INFO L93 Difference]: Finished difference Result 110005 states and 175707 transitions. [2018-09-18 10:11:21,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:11:21,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 297 [2018-09-18 10:11:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:22,153 INFO L225 Difference]: With dead ends: 110005 [2018-09-18 10:11:22,154 INFO L226 Difference]: Without dead ends: 73415 [2018-09-18 10:11:22,335 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 584 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:11:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73415 states. [2018-09-18 10:11:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73415 to 67159. [2018-09-18 10:11:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67159 states. [2018-09-18 10:11:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67159 states to 67159 states and 104014 transitions. [2018-09-18 10:11:24,841 INFO L78 Accepts]: Start accepts. Automaton has 67159 states and 104014 transitions. Word has length 297 [2018-09-18 10:11:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:24,842 INFO L480 AbstractCegarLoop]: Abstraction has 67159 states and 104014 transitions. [2018-09-18 10:11:24,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:11:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 67159 states and 104014 transitions. [2018-09-18 10:11:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-18 10:11:25,072 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:25,072 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:25,072 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1499709275, now seen corresponding path program 1 times [2018-09-18 10:11:25,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:25,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:25,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:25,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:25,075 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:25,441 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:11:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:26,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:26,310 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:26,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:26,318 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:26,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:26,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:26,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:26,757 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-18 10:11:26,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:26,781 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:27,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:27,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:27,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:11:27,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-18 10:11:27,420 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:11:27,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 10:11:27,421 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 10:11:27,421 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:11:27,421 INFO L87 Difference]: Start difference. First operand 67159 states and 104014 transitions. Second operand 13 states. [2018-09-18 10:11:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:36,406 INFO L93 Difference]: Finished difference Result 180176 states and 368594 transitions. [2018-09-18 10:11:36,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-18 10:11:36,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 315 [2018-09-18 10:11:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:37,182 INFO L225 Difference]: With dead ends: 180176 [2018-09-18 10:11:37,182 INFO L226 Difference]: Without dead ends: 113188 [2018-09-18 10:11:37,343 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1265 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2018-09-18 10:11:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113188 states. [2018-09-18 10:11:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113188 to 104999. [2018-09-18 10:11:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104999 states. [2018-09-18 10:11:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104999 states to 104999 states and 173503 transitions. [2018-09-18 10:11:42,958 INFO L78 Accepts]: Start accepts. Automaton has 104999 states and 173503 transitions. Word has length 315 [2018-09-18 10:11:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:42,959 INFO L480 AbstractCegarLoop]: Abstraction has 104999 states and 173503 transitions. [2018-09-18 10:11:42,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 10:11:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 104999 states and 173503 transitions. [2018-09-18 10:11:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-09-18 10:11:43,458 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:43,459 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:11:43,459 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash 492145254, now seen corresponding path program 1 times [2018-09-18 10:11:43,459 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:43,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:43,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:43,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:43,460 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:43,771 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:11:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 133 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:11:44,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:44,072 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:44,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:44,081 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:44,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-18 10:11:44,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 133 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:11:44,864 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:11:44,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-18 10:11:44,864 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:44,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:11:44,865 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:11:44,865 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:11:44,865 INFO L87 Difference]: Start difference. First operand 104999 states and 173503 transitions. Second operand 6 states. [2018-09-18 10:11:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:52,182 INFO L93 Difference]: Finished difference Result 225596 states and 395772 transitions. [2018-09-18 10:11:52,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:11:52,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 352 [2018-09-18 10:11:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:53,339 INFO L225 Difference]: With dead ends: 225596 [2018-09-18 10:11:53,339 INFO L226 Difference]: Without dead ends: 117957 [2018-09-18 10:11:53,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 696 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-09-18 10:11:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117957 states. [2018-09-18 10:11:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117957 to 110580. [2018-09-18 10:11:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110580 states. [2018-09-18 10:11:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110580 states to 110580 states and 178924 transitions. [2018-09-18 10:11:58,886 INFO L78 Accepts]: Start accepts. Automaton has 110580 states and 178924 transitions. Word has length 352 [2018-09-18 10:11:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:58,886 INFO L480 AbstractCegarLoop]: Abstraction has 110580 states and 178924 transitions. [2018-09-18 10:11:58,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:11:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 110580 states and 178924 transitions. [2018-09-18 10:11:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-18 10:11:59,442 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:59,442 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:59,442 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:59,443 INFO L82 PathProgramCache]: Analyzing trace with hash 972424633, now seen corresponding path program 1 times [2018-09-18 10:11:59,443 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:59,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:59,444 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:12:00,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:00,155 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:00,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:00,163 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:00,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-18 10:12:01,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:12:01,512 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:12:01,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:12:01,512 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:12:01,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:12:01,513 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:12:01,513 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:12:01,513 INFO L87 Difference]: Start difference. First operand 110580 states and 178924 transitions. Second operand 5 states. [2018-09-18 10:12:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:13,928 INFO L93 Difference]: Finished difference Result 308760 states and 510483 transitions. [2018-09-18 10:12:13,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:12:13,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 354 [2018-09-18 10:12:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:15,009 INFO L225 Difference]: With dead ends: 308760 [2018-09-18 10:12:15,009 INFO L226 Difference]: Without dead ends: 198406 [2018-09-18 10:12:15,444 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 703 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:12:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198406 states. [2018-09-18 10:12:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198406 to 184279. [2018-09-18 10:12:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184279 states. [2018-09-18 10:12:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184279 states to 184279 states and 301914 transitions. [2018-09-18 10:12:22,033 INFO L78 Accepts]: Start accepts. Automaton has 184279 states and 301914 transitions. Word has length 354 [2018-09-18 10:12:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:22,033 INFO L480 AbstractCegarLoop]: Abstraction has 184279 states and 301914 transitions. [2018-09-18 10:12:22,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:12:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 184279 states and 301914 transitions. [2018-09-18 10:12:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-09-18 10:12:22,855 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:22,856 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:12:22,856 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1012410568, now seen corresponding path program 1 times [2018-09-18 10:12:22,856 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:22,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:22,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:22,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:22,857 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:23,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:23,236 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:23,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:23,244 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:23,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:23,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:23,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:23,870 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:12:23,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:23,885 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:24,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:24,675 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:25,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:12:25,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 6] total 19 [2018-09-18 10:12:25,687 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:12:25,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:12:25,688 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:12:25,688 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-09-18 10:12:25,688 INFO L87 Difference]: Start difference. First operand 184279 states and 301914 transitions. Second operand 9 states. [2018-09-18 10:12:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:45,237 INFO L93 Difference]: Finished difference Result 370983 states and 697667 transitions. [2018-09-18 10:12:45,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-18 10:12:45,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 355 [2018-09-18 10:12:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:46,623 INFO L225 Difference]: With dead ends: 370983 [2018-09-18 10:12:46,623 INFO L226 Difference]: Without dead ends: 187559 [2018-09-18 10:12:47,460 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1474 GetRequests, 1431 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2018-09-18 10:12:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187559 states. [2018-09-18 10:12:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187559 to 170637. [2018-09-18 10:12:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170637 states. [2018-09-18 10:12:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170637 states to 170637 states and 257445 transitions. [2018-09-18 10:12:55,246 INFO L78 Accepts]: Start accepts. Automaton has 170637 states and 257445 transitions. Word has length 355 [2018-09-18 10:12:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:55,246 INFO L480 AbstractCegarLoop]: Abstraction has 170637 states and 257445 transitions. [2018-09-18 10:12:55,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:12:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 170637 states and 257445 transitions. [2018-09-18 10:12:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-09-18 10:12:55,904 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:55,904 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:12:55,904 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1941463000, now seen corresponding path program 1 times [2018-09-18 10:12:55,905 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:55,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:55,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:55,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:55,906 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:57,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:57,545 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:57,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:57,559 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:57,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:58,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:58,312 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 10:12:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:58,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:58,930 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:12:58,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:58,958 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:59,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:59,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:00,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:13:00,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 6] total 16 [2018-09-18 10:13:00,119 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:13:00,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:13:00,120 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:13:00,120 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-09-18 10:13:00,120 INFO L87 Difference]: Start difference. First operand 170637 states and 257445 transitions. Second operand 7 states. [2018-09-18 10:13:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:14,081 INFO L93 Difference]: Finished difference Result 420617 states and 679153 transitions. [2018-09-18 10:13:14,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:13:14,081 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 374 [2018-09-18 10:13:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:15,823 INFO L225 Difference]: With dead ends: 420617 [2018-09-18 10:13:15,823 INFO L226 Difference]: Without dead ends: 278000 [2018-09-18 10:13:16,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1502 GetRequests, 1486 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:13:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278000 states. [2018-09-18 10:13:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278000 to 267265. [2018-09-18 10:13:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267265 states. [2018-09-18 10:13:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267265 states to 267265 states and 400497 transitions. [2018-09-18 10:13:28,020 INFO L78 Accepts]: Start accepts. Automaton has 267265 states and 400497 transitions. Word has length 374 [2018-09-18 10:13:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:28,020 INFO L480 AbstractCegarLoop]: Abstraction has 267265 states and 400497 transitions. [2018-09-18 10:13:28,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:13:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 267265 states and 400497 transitions. [2018-09-18 10:13:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-09-18 10:13:28,927 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:28,928 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-09-18 10:13:28,928 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1912658116, now seen corresponding path program 1 times [2018-09-18 10:13:28,928 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:28,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:28,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:28,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:28,929 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 199 proven. 17 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 10:13:30,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:30,699 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:13:30,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:30,711 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:30,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-18 10:13:31,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 165 proven. 97 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 10:13:32,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:32,261 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:13:32,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:32,277 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:32,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-18 10:13:33,092 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 165 proven. 97 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 10:13:33,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:13:33,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 6] total 14 [2018-09-18 10:13:33,349 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:13:33,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:13:33,350 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:13:33,351 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:13:33,351 INFO L87 Difference]: Start difference. First operand 267265 states and 400497 transitions. Second operand 6 states. [2018-09-18 10:13:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:43,333 INFO L93 Difference]: Finished difference Result 467963 states and 697151 transitions. [2018-09-18 10:13:43,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 10:13:43,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 377 [2018-09-18 10:13:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:44,504 INFO L225 Difference]: With dead ends: 467963 [2018-09-18 10:13:44,505 INFO L226 Difference]: Without dead ends: 215360 [2018-09-18 10:13:45,156 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1514 GetRequests, 1496 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:13:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215360 states. [2018-09-18 10:13:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215360 to 214837. [2018-09-18 10:13:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214837 states. Received shutdown request... [2018-09-18 10:13:51,910 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:13:51,917 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:13:51,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:13:51 BoogieIcfgContainer [2018-09-18 10:13:51,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:13:51,918 INFO L168 Benchmark]: Toolchain (without parser) took 209987.57 ms. Allocated memory was 1.5 GB in the beginning and 5.2 GB in the end (delta: 3.7 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -106.4 MB). Peak memory consumption was 4.4 GB. Max. memory is 7.1 GB. [2018-09-18 10:13:51,923 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. [2018-09-18 10:13:51,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1024.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:51,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 165.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:51,927 INFO L168 Benchmark]: Boogie Preprocessor took 375.33 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 805.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -937.9 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:51,928 INFO L168 Benchmark]: RCFGBuilder took 4968.40 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 272.1 MB). Peak memory consumption was 272.1 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:51,929 INFO L168 Benchmark]: TraceAbstraction took 203445.70 ms. Allocated memory was 2.3 GB in the beginning and 5.2 GB in the end (delta: 2.9 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 464.3 MB). Peak memory consumption was 4.1 GB. Max. memory is 7.1 GB. [2018-09-18 10:13:51,940 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 1024.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 165.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 375.33 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 805.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -937.9 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4968.40 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 272.1 MB). Peak memory consumption was 272.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203445.70 ms. Allocated memory was 2.3 GB in the beginning and 5.2 GB in the end (delta: 2.9 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 464.3 MB). Peak memory consumption was 4.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1647]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1647). Cancelled while ReachableStatesComputation was computing reachable states (210557 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 203.3s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 120.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3416 SDtfs, 19748 SDslu, 5052 SDs, 0 SdLazy, 30634 SolverSat, 6151 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10507 GetRequests, 10223 SyntacticMatches, 44 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=267265occurred in iteration=14, 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: 49.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 68983 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 18.8s InterpolantComputationTime, 9470 NumberOfCodeBlocks, 9470 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 14540 ConstructedInterpolants, 0 QuantifiedInterpolants, 11292637 SizeOfPredicates, 24 NumberOfNonLiveVariables, 19211 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 47 InterpolantComputations, 11 PerfectInterpolantSequences, 6263/6849 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-13-51-955.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-13-51-955.csv Completed graceful shutdown