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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 13:02:09,917 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 13:02:09,920 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 13:02:09,931 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 13:02:09,932 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 13:02:09,933 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 13:02:09,934 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 13:02:09,936 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 13:02:09,937 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 13:02:09,938 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 13:02:09,939 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 13:02:09,939 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 13:02:09,940 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 13:02:09,941 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 13:02:09,942 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 13:02:09,943 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 13:02:09,944 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 13:02:09,946 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 13:02:09,948 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 13:02:09,949 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 13:02:09,950 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 13:02:09,952 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 13:02:09,954 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 13:02:09,954 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 13:02:09,955 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 13:02:09,955 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 13:02:09,957 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 13:02:09,957 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 13:02:09,958 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 13:02:09,959 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 13:02:09,960 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 13:02:09,960 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 13:02:09,961 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 13:02:09,961 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 13:02:09,962 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 13:02:09,963 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 13:02:09,963 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 13:02:09,979 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 13:02:09,979 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 13:02:09,980 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 13:02:09,980 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 13:02:09,980 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 13:02:09,980 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 13:02:09,980 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 13:02:09,981 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 13:02:09,981 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 13:02:09,981 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 13:02:09,981 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 13:02:09,981 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 13:02:09,982 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 13:02:09,982 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 13:02:09,982 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 13:02:09,983 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 13:02:09,983 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 13:02:09,983 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 13:02:09,983 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 13:02:09,983 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 13:02:09,984 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 13:02:09,984 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 13:02:09,984 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 13:02:09,984 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 13:02:09,984 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 13:02:09,985 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 13:02:09,985 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 13:02:09,985 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 13:02:09,987 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 13:02:09,987 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 13:02:09,987 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 13:02:09,987 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 13:02:09,987 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 13:02:09,988 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 13:02:10,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 13:02:10,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 13:02:10,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 13:02:10,069 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 13:02:10,069 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 13:02:10,070 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-11-07 13:02:10,134 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf4ae700/a0c2e6e4f4aa42098b8d121c8129e4fa/FLAGa7fe8bf0e [2018-11-07 13:02:10,784 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 13:02:10,785 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-11-07 13:02:10,801 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf4ae700/a0c2e6e4f4aa42098b8d121c8129e4fa/FLAGa7fe8bf0e [2018-11-07 13:02:10,817 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bf4ae700/a0c2e6e4f4aa42098b8d121c8129e4fa [2018-11-07 13:02:10,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 13:02:10,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 13:02:10,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 13:02:10,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 13:02:10,835 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 13:02:10,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:10" (1/1) ... [2018-11-07 13:02:10,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119bdb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:10, skipping insertion in model container [2018-11-07 13:02:10,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:10" (1/1) ... [2018-11-07 13:02:10,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 13:02:10,926 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 13:02:11,650 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 13:02:11,657 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 13:02:12,004 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 13:02:12,032 INFO L193 MainTranslator]: Completed translation [2018-11-07 13:02:12,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12 WrapperNode [2018-11-07 13:02:12,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 13:02:12,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 13:02:12,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 13:02:12,034 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 13:02:12,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 13:02:12,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 13:02:12,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 13:02:12,237 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 13:02:12,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... [2018-11-07 13:02:12,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 13:02:12,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 13:02:12,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 13:02:12,383 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 13:02:12,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 13:02:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 13:02:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 13:02:12,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 13:02:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 13:02:12,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 13:02:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 13:02:12,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 13:02:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 13:02:12,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 13:02:17,298 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 13:02:17,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:02:17 BoogieIcfgContainer [2018-11-07 13:02:17,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 13:02:17,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 13:02:17,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 13:02:17,304 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 13:02:17,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:02:10" (1/3) ... [2018-11-07 13:02:17,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6dcfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:02:17, skipping insertion in model container [2018-11-07 13:02:17,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:12" (2/3) ... [2018-11-07 13:02:17,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6dcfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:02:17, skipping insertion in model container [2018-11-07 13:02:17,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:02:17" (3/3) ... [2018-11-07 13:02:17,308 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label23_true-unreach-call.c [2018-11-07 13:02:17,318 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 13:02:17,325 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 13:02:17,339 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 13:02:17,378 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 13:02:17,378 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 13:02:17,378 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 13:02:17,378 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 13:02:17,378 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 13:02:17,378 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 13:02:17,379 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 13:02:17,379 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 13:02:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 13:02:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-07 13:02:17,425 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:17,426 INFO L375 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] [2018-11-07 13:02:17,428 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:17,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:17,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1250104911, now seen corresponding path program 1 times [2018-11-07 13:02:17,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:17,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:17,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:17,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:17,486 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:18,283 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-11-07 13:02:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:02:18,575 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 13:02:18,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 13:02:18,576 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:18,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 13:02:18,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 13:02:18,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 13:02:18,607 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 13:02:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:02:21,836 INFO L93 Difference]: Finished difference Result 1084 states and 1945 transitions. [2018-11-07 13:02:21,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 13:02:21,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2018-11-07 13:02:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:02:21,867 INFO L225 Difference]: With dead ends: 1084 [2018-11-07 13:02:21,868 INFO L226 Difference]: Without dead ends: 766 [2018-11-07 13:02:21,876 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 13:02:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2018-11-07 13:02:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 524. [2018-11-07 13:02:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-11-07 13:02:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 918 transitions. [2018-11-07 13:02:22,010 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 918 transitions. Word has length 178 [2018-11-07 13:02:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:02:22,011 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 918 transitions. [2018-11-07 13:02:22,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 13:02:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 918 transitions. [2018-11-07 13:02:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-07 13:02:22,031 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:22,032 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 13:02:22,032 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:22,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:22,034 INFO L82 PathProgramCache]: Analyzing trace with hash -217139872, now seen corresponding path program 1 times [2018-11-07 13:02:22,034 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:22,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:22,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:22,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:22,036 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:02:22,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 13:02:22,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 13:02:22,391 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:22,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 13:02:22,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 13:02:22,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 13:02:22,394 INFO L87 Difference]: Start difference. First operand 524 states and 918 transitions. Second operand 5 states. [2018-11-07 13:02:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:02:25,427 INFO L93 Difference]: Finished difference Result 1614 states and 2930 transitions. [2018-11-07 13:02:25,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 13:02:25,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2018-11-07 13:02:25,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:02:25,452 INFO L225 Difference]: With dead ends: 1614 [2018-11-07 13:02:25,452 INFO L226 Difference]: Without dead ends: 1096 [2018-11-07 13:02:25,461 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 13:02:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2018-11-07 13:02:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1073. [2018-11-07 13:02:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-11-07 13:02:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1769 transitions. [2018-11-07 13:02:25,533 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1769 transitions. Word has length 189 [2018-11-07 13:02:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:02:25,533 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1769 transitions. [2018-11-07 13:02:25,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 13:02:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1769 transitions. [2018-11-07 13:02:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-07 13:02:25,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:25,539 INFO L375 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] [2018-11-07 13:02:25,539 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:25,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:25,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1010977333, now seen corresponding path program 1 times [2018-11-07 13:02:25,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:25,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:25,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:25,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:25,542 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:02:25,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 13:02:25,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 13:02:25,873 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:25,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 13:02:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 13:02:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 13:02:25,878 INFO L87 Difference]: Start difference. First operand 1073 states and 1769 transitions. Second operand 3 states. [2018-11-07 13:02:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:02:28,381 INFO L93 Difference]: Finished difference Result 3100 states and 5252 transitions. [2018-11-07 13:02:28,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 13:02:28,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2018-11-07 13:02:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:02:28,397 INFO L225 Difference]: With dead ends: 3100 [2018-11-07 13:02:28,398 INFO L226 Difference]: Without dead ends: 2033 [2018-11-07 13:02:28,403 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 13:02:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2018-11-07 13:02:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2030. [2018-11-07 13:02:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2030 states. [2018-11-07 13:02:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3203 transitions. [2018-11-07 13:02:28,482 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3203 transitions. Word has length 191 [2018-11-07 13:02:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:02:28,483 INFO L480 AbstractCegarLoop]: Abstraction has 2030 states and 3203 transitions. [2018-11-07 13:02:28,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 13:02:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3203 transitions. [2018-11-07 13:02:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-11-07 13:02:28,493 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:28,493 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 13:02:28,493 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:28,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1402232081, now seen corresponding path program 1 times [2018-11-07 13:02:28,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:28,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:28,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:28,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:28,496 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:28,859 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-11-07 13:02:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:02:29,000 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 13:02:29,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 13:02:29,001 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:29,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 13:02:29,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 13:02:29,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 13:02:29,002 INFO L87 Difference]: Start difference. First operand 2030 states and 3203 transitions. Second operand 6 states. [2018-11-07 13:02:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:02:31,982 INFO L93 Difference]: Finished difference Result 5883 states and 9834 transitions. [2018-11-07 13:02:31,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 13:02:31,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2018-11-07 13:02:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:02:32,011 INFO L225 Difference]: With dead ends: 5883 [2018-11-07 13:02:32,012 INFO L226 Difference]: Without dead ends: 3859 [2018-11-07 13:02:32,022 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 13:02:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2018-11-07 13:02:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3792. [2018-11-07 13:02:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3792 states. [2018-11-07 13:02:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 5638 transitions. [2018-11-07 13:02:32,190 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 5638 transitions. Word has length 193 [2018-11-07 13:02:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:02:32,191 INFO L480 AbstractCegarLoop]: Abstraction has 3792 states and 5638 transitions. [2018-11-07 13:02:32,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 13:02:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 5638 transitions. [2018-11-07 13:02:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-07 13:02:32,203 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:32,204 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 13:02:32,204 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:32,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash 943603689, now seen corresponding path program 1 times [2018-11-07 13:02:32,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:32,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:32,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:32,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:32,206 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:32,435 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-07 13:02:32,774 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 13:02:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:02:32,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:02:32,990 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 13:02:32,991 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-11-07 13:02:32,994 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 13:02:33,071 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 13:02:33,072 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 13:02:52,549 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 13:02:52,551 INFO L272 AbstractInterpreter]: Visited 179 different actions 179 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 13:02:52,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:52,604 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 13:03:05,481 INFO L227 lantSequenceWeakener]: Weakened 199 states. On average, predicates are now at 72.47% of their original sizes. [2018-11-07 13:03:05,481 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 13:03:06,417 INFO L415 sIntCurrentIteration]: We unified 207 AI predicates to 207 [2018-11-07 13:03:06,417 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 13:03:06,419 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 13:03:06,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [8] total 22 [2018-11-07 13:03:06,419 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:03:06,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 13:03:06,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 13:03:06,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-07 13:03:06,421 INFO L87 Difference]: Start difference. First operand 3792 states and 5638 transitions. Second operand 16 states. [2018-11-07 13:04:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:04:00,156 INFO L93 Difference]: Finished difference Result 7788 states and 11545 transitions. [2018-11-07 13:04:00,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 13:04:00,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 208 [2018-11-07 13:04:00,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:04:00,179 INFO L225 Difference]: With dead ends: 7788 [2018-11-07 13:04:00,179 INFO L226 Difference]: Without dead ends: 4002 [2018-11-07 13:04:00,192 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 210 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-07 13:04:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2018-11-07 13:04:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 4000. [2018-11-07 13:04:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4000 states. [2018-11-07 13:04:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 5855 transitions. [2018-11-07 13:04:00,298 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 5855 transitions. Word has length 208 [2018-11-07 13:04:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:04:00,298 INFO L480 AbstractCegarLoop]: Abstraction has 4000 states and 5855 transitions. [2018-11-07 13:04:00,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 13:04:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 5855 transitions. [2018-11-07 13:04:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 13:04:00,308 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:04:00,309 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 13:04:00,309 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:04:00,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:04:00,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1528109442, now seen corresponding path program 1 times [2018-11-07 13:04:00,310 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:04:00,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:04:00,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:04:00,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:04:00,313 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:04:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:04:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:04:00,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:04:00,592 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 13:04:00,592 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 13:04:00,593 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 13:04:00,602 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 13:04:00,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 13:05:29,446 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 13:05:29,447 INFO L272 AbstractInterpreter]: Visited 183 different actions 358 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 13:05:29,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:05:29,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 13:05:29,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:05:29,460 INFO L194 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 [2018-11-07 13:05:29,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:05:29,475 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 13:05:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:05:29,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 13:05:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:05:30,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 13:05:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:05:31,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 13:05:31,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2018-11-07 13:05:31,070 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 13:05:31,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 13:05:31,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 13:05:31,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 13:05:31,072 INFO L87 Difference]: Start difference. First operand 4000 states and 5855 transitions. Second operand 12 states. [2018-11-07 13:05:32,868 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 13:05:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:05:43,098 INFO L93 Difference]: Finished difference Result 24689 states and 40439 transitions. [2018-11-07 13:05:43,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-11-07 13:05:43,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 217 [2018-11-07 13:05:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:05:43,239 INFO L225 Difference]: With dead ends: 24689 [2018-11-07 13:05:43,239 INFO L226 Difference]: Without dead ends: 20903 [2018-11-07 13:05:43,308 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1336, Invalid=7220, Unknown=0, NotChecked=0, Total=8556 [2018-11-07 13:05:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2018-11-07 13:05:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 20604. [2018-11-07 13:05:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20604 states. [2018-11-07 13:05:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20604 states to 20604 states and 28801 transitions. [2018-11-07 13:05:44,134 INFO L78 Accepts]: Start accepts. Automaton has 20604 states and 28801 transitions. Word has length 217 [2018-11-07 13:05:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:05:44,134 INFO L480 AbstractCegarLoop]: Abstraction has 20604 states and 28801 transitions. [2018-11-07 13:05:44,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 13:05:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 20604 states and 28801 transitions. [2018-11-07 13:05:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-11-07 13:05:44,163 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:05:44,164 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 13:05:44,164 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:05:44,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:05:44,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1080458592, now seen corresponding path program 1 times [2018-11-07 13:05:44,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:05:44,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:05:44,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:05:44,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:05:44,166 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:05:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:05:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 107 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 13:05:44,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:05:44,771 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 13:05:44,771 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 282 with the following transitions: [2018-11-07 13:05:44,772 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [338], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 13:05:44,792 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 13:05:44,793 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown