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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 07:10:34,992 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 07:10:34,994 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 07:10:35,006 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 07:10:35,006 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 07:10:35,007 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 07:10:35,009 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 07:10:35,011 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 07:10:35,013 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 07:10:35,014 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 07:10:35,015 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 07:10:35,015 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 07:10:35,016 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 07:10:35,017 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 07:10:35,018 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 07:10:35,019 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 07:10:35,020 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 07:10:35,022 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 07:10:35,024 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 07:10:35,025 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 07:10:35,026 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 07:10:35,028 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 07:10:35,030 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 07:10:35,031 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 07:10:35,031 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 07:10:35,035 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 07:10:35,036 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 07:10:35,037 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 07:10:35,040 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 07:10:35,043 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 07:10:35,043 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 07:10:35,044 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 07:10:35,045 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 07:10:35,045 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 07:10:35,046 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 07:10:35,048 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 07:10:35,048 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 07:10:35,070 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 07:10:35,070 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 07:10:35,071 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 07:10:35,071 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 07:10:35,072 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 07:10:35,072 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 07:10:35,072 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 07:10:35,072 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 07:10:35,072 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 07:10:35,073 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 07:10:35,073 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 07:10:35,073 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 07:10:35,073 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 07:10:35,073 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 07:10:35,074 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 07:10:35,074 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 07:10:35,074 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 07:10:35,075 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 07:10:35,075 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 07:10:35,075 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 07:10:35,075 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 07:10:35,075 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 07:10:35,076 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 07:10:35,076 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 07:10:35,076 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 07:10:35,076 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 07:10:35,077 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:10:35,077 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 07:10:35,077 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 07:10:35,077 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 07:10:35,077 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 07:10:35,078 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 07:10:35,078 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 07:10:35,078 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 07:10:35,078 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 07:10:35,078 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 07:10:35,122 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 07:10:35,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 07:10:35,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 07:10:35,143 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 07:10:35,144 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 07:10:35,144 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-11-07 07:10:35,212 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6063245/10c6daff74d54879bb665fd3bbbc6ab2/FLAG0d7bd5417 [2018-11-07 07:10:35,841 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 07:10:35,842 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-11-07 07:10:35,863 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6063245/10c6daff74d54879bb665fd3bbbc6ab2/FLAG0d7bd5417 [2018-11-07 07:10:35,881 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6063245/10c6daff74d54879bb665fd3bbbc6ab2 [2018-11-07 07:10:35,894 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 07:10:35,895 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 07:10:35,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 07:10:35,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 07:10:35,900 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 07:10:35,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:10:35" (1/1) ... [2018-11-07 07:10:35,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c639f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:35, skipping insertion in model container [2018-11-07 07:10:35,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:10:35" (1/1) ... [2018-11-07 07:10:35,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 07:10:36,019 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 07:10:36,815 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:10:36,822 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 07:10:37,093 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:10:37,141 INFO L193 MainTranslator]: Completed translation [2018-11-07 07:10:37,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37 WrapperNode [2018-11-07 07:10:37,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 07:10:37,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 07:10:37,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 07:10:37,145 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 07:10:37,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 07:10:37,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 07:10:37,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 07:10:37,356 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 07:10:37,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (1/1) ... [2018-11-07 07:10:37,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 07:10:37,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 07:10:37,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 07:10:37,501 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 07:10:37,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (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 07:10:37,564 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 07:10:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 07:10:37,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 07:10:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 07:10:37,565 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 07:10:37,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 07:10:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 07:10:37,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 07:10:37,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 07:10:42,873 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 07:10:42,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:10:42 BoogieIcfgContainer [2018-11-07 07:10:42,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 07:10:42,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 07:10:42,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 07:10:42,879 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 07:10:42,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:10:35" (1/3) ... [2018-11-07 07:10:42,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305953c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:10:42, skipping insertion in model container [2018-11-07 07:10:42,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:37" (2/3) ... [2018-11-07 07:10:42,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305953c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:10:42, skipping insertion in model container [2018-11-07 07:10:42,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:10:42" (3/3) ... [2018-11-07 07:10:42,886 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label01_true-unreach-call.c [2018-11-07 07:10:42,897 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 07:10:42,911 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 07:10:42,929 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 07:10:42,975 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 07:10:42,975 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 07:10:42,976 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 07:10:42,976 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 07:10:42,976 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 07:10:42,976 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 07:10:42,976 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 07:10:42,976 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 07:10:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 07:10:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-11-07 07:10:43,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:10:43,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:10:43,031 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:10:43,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1178454204, now seen corresponding path program 1 times [2018-11-07 07:10:43,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:10:43,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:43,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:10:43,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:43,100 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:10:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:10:44,076 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:10:44,306 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 07:10:44,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:10:44,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:10:44,309 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:10:44,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:10:44,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:10:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:10:44,329 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 07:10:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:10:46,682 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-11-07 07:10:46,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:10:46,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2018-11-07 07:10:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:10:46,708 INFO L225 Difference]: With dead ends: 844 [2018-11-07 07:10:46,709 INFO L226 Difference]: Without dead ends: 530 [2018-11-07 07:10:46,716 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:10:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-11-07 07:10:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-11-07 07:10:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-11-07 07:10:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-11-07 07:10:46,843 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 193 [2018-11-07 07:10:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:10:46,845 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-11-07 07:10:46,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:10:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-11-07 07:10:46,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-07 07:10:46,865 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:10:46,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:10:46,866 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:10:46,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:46,870 INFO L82 PathProgramCache]: Analyzing trace with hash 851918400, now seen corresponding path program 1 times [2018-11-07 07:10:46,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:10:46,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:46,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:10:46,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:46,872 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:10:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:10:47,364 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 07:10:47,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:10:47,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:10:47,365 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:10:47,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:10:47,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:10:47,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:10:47,368 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-11-07 07:10:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:10:49,481 INFO L93 Difference]: Finished difference Result 1477 states and 2511 transitions. [2018-11-07 07:10:49,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:10:49,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2018-11-07 07:10:49,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:10:49,489 INFO L225 Difference]: With dead ends: 1477 [2018-11-07 07:10:49,489 INFO L226 Difference]: Without dead ends: 958 [2018-11-07 07:10:49,493 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 [2018-11-07 07:10:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-11-07 07:10:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2018-11-07 07:10:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-11-07 07:10:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1546 transitions. [2018-11-07 07:10:49,536 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1546 transitions. Word has length 206 [2018-11-07 07:10:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:10:49,536 INFO L480 AbstractCegarLoop]: Abstraction has 943 states and 1546 transitions. [2018-11-07 07:10:49,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:10:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1546 transitions. [2018-11-07 07:10:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-11-07 07:10:49,542 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:10:49,542 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 07:10:49,543 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:10:49,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:49,543 INFO L82 PathProgramCache]: Analyzing trace with hash 584750157, now seen corresponding path program 1 times [2018-11-07 07:10:49,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:10:49,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:49,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:10:49,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:49,545 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:10:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:10:49,816 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 07:10:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:10:50,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:10:50,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 07:10:50,019 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:10:50,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 07:10:50,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 07:10:50,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 07:10:50,021 INFO L87 Difference]: Start difference. First operand 943 states and 1546 transitions. Second operand 6 states. [2018-11-07 07:10:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:10:56,211 INFO L93 Difference]: Finished difference Result 2885 states and 4975 transitions. [2018-11-07 07:10:56,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 07:10:56,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2018-11-07 07:10:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:10:56,239 INFO L225 Difference]: With dead ends: 2885 [2018-11-07 07:10:56,240 INFO L226 Difference]: Without dead ends: 1948 [2018-11-07 07:10:56,245 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:10:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2018-11-07 07:10:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1883. [2018-11-07 07:10:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2018-11-07 07:10:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 3103 transitions. [2018-11-07 07:10:56,364 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 3103 transitions. Word has length 211 [2018-11-07 07:10:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:10:56,365 INFO L480 AbstractCegarLoop]: Abstraction has 1883 states and 3103 transitions. [2018-11-07 07:10:56,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 07:10:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 3103 transitions. [2018-11-07 07:10:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-07 07:10:56,374 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:10:56,374 INFO L375 BasicCegarLoop]: trace histogram [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, 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 07:10:56,374 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:10:56,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:56,375 INFO L82 PathProgramCache]: Analyzing trace with hash -223286947, now seen corresponding path program 1 times [2018-11-07 07:10:56,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:10:56,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:56,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:10:56,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:56,377 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:10:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:10:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:10:56,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:10:56,790 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:10:56,791 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2018-11-07 07:10:56,793 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [25], [29], [33], [36], [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], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:10:56,863 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:10:56,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:10:58,165 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:10:58,167 INFO L272 AbstractInterpreter]: Visited 194 different actions 194 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 07:10:58,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:58,211 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:10:59,412 INFO L227 lantSequenceWeakener]: Weakened 209 states. On average, predicates are now at 73.89% of their original sizes. [2018-11-07 07:10:59,413 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:11:00,151 INFO L415 sIntCurrentIteration]: We unified 217 AI predicates to 217 [2018-11-07 07:11:00,151 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:11:00,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:00,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-07 07:11:00,152 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:00,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 07:11:00,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 07:11:00,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:11:00,154 INFO L87 Difference]: Start difference. First operand 1883 states and 3103 transitions. Second operand 16 states. [2018-11-07 07:11:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:27,601 INFO L93 Difference]: Finished difference Result 3970 states and 6516 transitions. [2018-11-07 07:11:27,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 07:11:27,602 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 218 [2018-11-07 07:11:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:27,621 INFO L225 Difference]: With dead ends: 3970 [2018-11-07 07:11:27,621 INFO L226 Difference]: Without dead ends: 2093 [2018-11-07 07:11:27,628 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 218 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-11-07 07:11:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2018-11-07 07:11:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2091. [2018-11-07 07:11:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2018-11-07 07:11:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 3320 transitions. [2018-11-07 07:11:27,693 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 3320 transitions. Word has length 218 [2018-11-07 07:11:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:27,693 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 3320 transitions. [2018-11-07 07:11:27,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 07:11:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 3320 transitions. [2018-11-07 07:11:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-07 07:11:27,702 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:27,703 INFO L375 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] [2018-11-07 07:11:27,703 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:27,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1470271054, now seen corresponding path program 1 times [2018-11-07 07:11:27,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:27,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:27,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:27,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:27,706 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:28,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:28,236 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:28,237 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2018-11-07 07:11:28,237 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [25], [29], [33], [37], [41], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:28,256 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:28,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:29,284 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:11:29,285 INFO L272 AbstractInterpreter]: Visited 197 different actions 387 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 07:11:29,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:29,312 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:11:30,064 INFO L227 lantSequenceWeakener]: Weakened 222 states. On average, predicates are now at 76.61% of their original sizes. [2018-11-07 07:11:30,065 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:11:30,569 INFO L415 sIntCurrentIteration]: We unified 224 AI predicates to 224 [2018-11-07 07:11:30,569 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:11:30,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:30,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 07:11:30,570 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:30,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 07:11:30,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 07:11:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-11-07 07:11:30,572 INFO L87 Difference]: Start difference. First operand 2091 states and 3320 transitions. Second operand 22 states. [2018-11-07 07:12:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:16,185 INFO L93 Difference]: Finished difference Result 5250 states and 8654 transitions. [2018-11-07 07:12:16,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 07:12:16,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 225 [2018-11-07 07:12:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:16,203 INFO L225 Difference]: With dead ends: 5250 [2018-11-07 07:12:16,204 INFO L226 Difference]: Without dead ends: 3373 [2018-11-07 07:12:16,211 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 233 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2018-11-07 07:12:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2018-11-07 07:12:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3365. [2018-11-07 07:12:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3365 states. [2018-11-07 07:12:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 5116 transitions. [2018-11-07 07:12:16,309 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 5116 transitions. Word has length 225 [2018-11-07 07:12:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:16,310 INFO L480 AbstractCegarLoop]: Abstraction has 3365 states and 5116 transitions. [2018-11-07 07:12:16,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 07:12:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 5116 transitions. [2018-11-07 07:12:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-11-07 07:12:16,325 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:16,325 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:12:16,325 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:16,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:16,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1234399812, now seen corresponding path program 1 times [2018-11-07 07:12:16,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:16,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:16,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:16,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:16,327 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 07:12:16,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:16,558 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:16,558 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 229 with the following transitions: [2018-11-07 07:12:16,560 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [24], [25], [28], [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], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:16,568 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:16,568 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:17,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:17,745 INFO L272 AbstractInterpreter]: Visited 199 different actions 591 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:12:17,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:17,761 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:17,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:17,761 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 07:12:18,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:18,043 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:18,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-07 07:12:18,703 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-07 07:12:19,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 07:12:19,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-11-07 07:12:19,792 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:12:19,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 07:12:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 07:12:19,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:12:19,794 INFO L87 Difference]: Start difference. First operand 3365 states and 5116 transitions. Second operand 5 states. [2018-11-07 07:12:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:21,240 INFO L93 Difference]: Finished difference Result 8829 states and 14138 transitions. [2018-11-07 07:12:21,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 07:12:21,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2018-11-07 07:12:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:21,270 INFO L225 Difference]: With dead ends: 8829 [2018-11-07 07:12:21,270 INFO L226 Difference]: Without dead ends: 6099 [2018-11-07 07:12:21,281 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 446 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:12:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2018-11-07 07:12:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 6096. [2018-11-07 07:12:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6096 states. [2018-11-07 07:12:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 9655 transitions. [2018-11-07 07:12:21,442 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 9655 transitions. Word has length 228 [2018-11-07 07:12:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:21,443 INFO L480 AbstractCegarLoop]: Abstraction has 6096 states and 9655 transitions. [2018-11-07 07:12:21,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 07:12:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 9655 transitions. [2018-11-07 07:12:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-11-07 07:12:21,465 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:21,465 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 07:12:21,465 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:21,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1815954702, now seen corresponding path program 1 times [2018-11-07 07:12:21,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:21,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:21,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:21,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:21,468 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:21,779 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:12:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:22,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:22,216 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:22,216 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 228 with the following transitions: [2018-11-07 07:12:22,216 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:22,222 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:22,222 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:23,727 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:23,727 INFO L272 AbstractInterpreter]: Visited 198 different actions 590 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:12:23,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:23,737 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:23,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:23,737 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 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 [2018-11-07 07:12:23,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:23,747 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:23,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:24,061 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:24,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:12:24,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-11-07 07:12:24,235 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:12:24,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:12:24,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:12:24,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-07 07:12:24,236 INFO L87 Difference]: Start difference. First operand 6096 states and 9655 transitions. Second operand 12 states. [2018-11-07 07:12:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:31,891 INFO L93 Difference]: Finished difference Result 30589 states and 55076 transitions. [2018-11-07 07:12:31,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 07:12:31,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 227 [2018-11-07 07:12:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:32,036 INFO L225 Difference]: With dead ends: 30589 [2018-11-07 07:12:32,036 INFO L226 Difference]: Without dead ends: 24288 [2018-11-07 07:12:32,087 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 462 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2018-11-07 07:12:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2018-11-07 07:12:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 24257. [2018-11-07 07:12:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24257 states. [2018-11-07 07:12:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24257 states to 24257 states and 37387 transitions. [2018-11-07 07:12:32,845 INFO L78 Accepts]: Start accepts. Automaton has 24257 states and 37387 transitions. Word has length 227 [2018-11-07 07:12:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:32,845 INFO L480 AbstractCegarLoop]: Abstraction has 24257 states and 37387 transitions. [2018-11-07 07:12:32,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:12:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 24257 states and 37387 transitions. [2018-11-07 07:12:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-11-07 07:12:32,925 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:32,925 INFO L375 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] [2018-11-07 07:12:32,926 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:32,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:32,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1873001038, now seen corresponding path program 1 times [2018-11-07 07:12:32,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:32,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:32,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:32,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:32,928 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:33,408 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 6 [2018-11-07 07:12:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 07:12:34,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:34,106 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:34,106 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 242 with the following transitions: [2018-11-07 07:12:34,107 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [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], [127], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:34,112 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:34,112 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:35,430 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:35,430 INFO L272 AbstractInterpreter]: Visited 198 different actions 591 times. Merged at 7 different actions 21 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:12:35,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:35,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:35,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:35,435 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 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 [2018-11-07 07:12:35,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:35,445 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:35,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:35,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:36,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:12:36,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2018-11-07 07:12:36,716 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:12:36,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:12:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:12:36,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2018-11-07 07:12:36,719 INFO L87 Difference]: Start difference. First operand 24257 states and 37387 transitions. Second operand 12 states. [2018-11-07 07:12:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:45,080 INFO L93 Difference]: Finished difference Result 103974 states and 177531 transitions. [2018-11-07 07:12:45,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-07 07:12:45,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 241 [2018-11-07 07:12:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:45,588 INFO L225 Difference]: With dead ends: 103974 [2018-11-07 07:12:45,588 INFO L226 Difference]: Without dead ends: 79933 [2018-11-07 07:12:45,726 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 473 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2018-11-07 07:12:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79933 states. [2018-11-07 07:12:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79933 to 78092. [2018-11-07 07:12:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78092 states. [2018-11-07 07:12:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78092 states to 78092 states and 119874 transitions. [2018-11-07 07:12:48,492 INFO L78 Accepts]: Start accepts. Automaton has 78092 states and 119874 transitions. Word has length 241 [2018-11-07 07:12:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:48,493 INFO L480 AbstractCegarLoop]: Abstraction has 78092 states and 119874 transitions. [2018-11-07 07:12:48,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:12:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 78092 states and 119874 transitions. [2018-11-07 07:12:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-11-07 07:12:48,669 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:48,669 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:12:48,670 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:48,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash 191668955, now seen corresponding path program 1 times [2018-11-07 07:12:48,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:48,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:48,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:48,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:48,672 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:48,990 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 07:12:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 07:12:49,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:49,467 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:49,467 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 257 with the following transitions: [2018-11-07 07:12:49,467 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:49,471 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:49,472 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:50,020 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:12:50,020 INFO L272 AbstractInterpreter]: Visited 198 different actions 390 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:12:50,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:50,027 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:12:50,692 INFO L227 lantSequenceWeakener]: Weakened 253 states. On average, predicates are now at 73.76% of their original sizes. [2018-11-07 07:12:50,693 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:12:51,504 INFO L415 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2018-11-07 07:12:51,504 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:12:51,505 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:12:51,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [10] total 30 [2018-11-07 07:12:51,505 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:12:51,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 07:12:51,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 07:12:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-11-07 07:12:51,507 INFO L87 Difference]: Start difference. First operand 78092 states and 119874 transitions. Second operand 22 states. [2018-11-07 07:13:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:13:28,851 INFO L93 Difference]: Finished difference Result 156184 states and 239787 transitions. [2018-11-07 07:13:28,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 07:13:28,851 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 256 [2018-11-07 07:13:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:13:29,207 INFO L225 Difference]: With dead ends: 156184 [2018-11-07 07:13:29,208 INFO L226 Difference]: Without dead ends: 78308 [2018-11-07 07:13:29,410 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 264 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2018-11-07 07:13:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78308 states. [2018-11-07 07:13:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78308 to 78305. [2018-11-07 07:13:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78305 states. [2018-11-07 07:13:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78305 states to 78305 states and 120094 transitions. [2018-11-07 07:13:31,789 INFO L78 Accepts]: Start accepts. Automaton has 78305 states and 120094 transitions. Word has length 256 [2018-11-07 07:13:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:13:31,789 INFO L480 AbstractCegarLoop]: Abstraction has 78305 states and 120094 transitions. [2018-11-07 07:13:31,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 07:13:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 78305 states and 120094 transitions. [2018-11-07 07:13:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-11-07 07:13:31,880 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:13:31,881 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:31,881 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:13:31,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash -762328005, now seen corresponding path program 1 times [2018-11-07 07:13:31,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:13:31,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:31,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:31,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:31,883 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:13:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:32,461 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 07:13:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 07:13:32,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:32,782 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:13:32,783 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 302 with the following transitions: [2018-11-07 07:13:32,783 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [28], [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], [339], [343], [347], [350], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:13:32,790 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:13:32,790 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:13:33,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:13:33,834 INFO L272 AbstractInterpreter]: Visited 199 different actions 593 times. Merged at 8 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:13:33,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:33,847 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:13:33,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:33,847 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:13:33,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:33,857 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:13:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:34,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:13:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-11-07 07:13:34,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:13:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-11-07 07:13:34,917 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:13:34,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 07:13:34,917 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:13:34,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:13:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:13:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:13:34,919 INFO L87 Difference]: Start difference. First operand 78305 states and 120094 transitions. Second operand 3 states. [2018-11-07 07:13:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:13:38,782 INFO L93 Difference]: Finished difference Result 221861 states and 346195 transitions. [2018-11-07 07:13:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:13:38,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 301 [2018-11-07 07:13:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:13:39,480 INFO L225 Difference]: With dead ends: 221861 [2018-11-07 07:13:39,480 INFO L226 Difference]: Without dead ends: 143985 [2018-11-07 07:13:39,720 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 600 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:13:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143985 states. [2018-11-07 07:13:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143985 to 143892. [2018-11-07 07:13:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143892 states. [2018-11-07 07:13:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143892 states to 143892 states and 211574 transitions. [2018-11-07 07:13:42,730 INFO L78 Accepts]: Start accepts. Automaton has 143892 states and 211574 transitions. Word has length 301 [2018-11-07 07:13:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:13:42,731 INFO L480 AbstractCegarLoop]: Abstraction has 143892 states and 211574 transitions. [2018-11-07 07:13:42,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:13:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 143892 states and 211574 transitions. [2018-11-07 07:13:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-11-07 07:13:46,857 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:13:46,857 INFO L375 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, 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] [2018-11-07 07:13:46,857 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:13:46,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1400355272, now seen corresponding path program 1 times [2018-11-07 07:13:46,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:13:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:46,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:46,859 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:13:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:47,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:47,442 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:13:47,443 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 358 with the following transitions: [2018-11-07 07:13:47,443 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [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], [256], [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], [436], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:13:47,448 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:13:47,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:13:48,019 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:13:48,019 INFO L272 AbstractInterpreter]: Visited 197 different actions 388 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:13:48,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:48,031 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:13:48,793 INFO L227 lantSequenceWeakener]: Weakened 354 states. On average, predicates are now at 73.78% of their original sizes. [2018-11-07 07:13:48,793 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:13:49,057 INFO L415 sIntCurrentIteration]: We unified 356 AI predicates to 356 [2018-11-07 07:13:49,057 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:13:49,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:13:49,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-11-07 07:13:49,057 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:13:49,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 07:13:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 07:13:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-11-07 07:13:49,058 INFO L87 Difference]: Start difference. First operand 143892 states and 211574 transitions. Second operand 17 states. [2018-11-07 07:14:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:14:05,878 INFO L93 Difference]: Finished difference Result 298267 states and 439740 transitions. [2018-11-07 07:14:05,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 07:14:05,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 357 [2018-11-07 07:14:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:14:06,476 INFO L225 Difference]: With dead ends: 298267 [2018-11-07 07:14:06,476 INFO L226 Difference]: Without dead ends: 154804 [2018-11-07 07:14:06,697 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2018-11-07 07:14:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154804 states. [2018-11-07 07:14:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154804 to 154791. [2018-11-07 07:14:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154791 states. [2018-11-07 07:14:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154791 states to 154791 states and 225503 transitions. [2018-11-07 07:14:10,311 INFO L78 Accepts]: Start accepts. Automaton has 154791 states and 225503 transitions. Word has length 357 [2018-11-07 07:14:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:14:10,311 INFO L480 AbstractCegarLoop]: Abstraction has 154791 states and 225503 transitions. [2018-11-07 07:14:10,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 07:14:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 154791 states and 225503 transitions. [2018-11-07 07:14:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-11-07 07:14:10,544 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:14:10,545 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 07:14:10,545 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:14:10,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:14:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1448449981, now seen corresponding path program 1 times [2018-11-07 07:14:10,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:14:10,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:10,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:10,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:10,547 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:14:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 202 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:14:11,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:11,220 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:14:11,220 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 380 with the following transitions: [2018-11-07 07:14:11,220 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [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], [174], [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], [543], [548], [550], [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], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:14:11,225 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:14:11,226 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-11-07 07:14:13,273 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 07:14:13,273 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 07:14:13,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 07:14:13,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:13,274 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 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 [2018-11-07 07:14:13,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:13,286 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:14:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:13,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:14:13,536 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 07:14:13,737 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:14:13,737 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 07:14:13,743 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 07:14:13,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:14:13 BoogieIcfgContainer [2018-11-07 07:14:13,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 07:14:13,744 INFO L168 Benchmark]: Toolchain (without parser) took 217849.74 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 07:14:13,745 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:14:13,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1245.65 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. [2018-11-07 07:14:13,746 INFO L168 Benchmark]: Boogie Procedure Inliner took 212.63 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 709.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -835.0 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:13,747 INFO L168 Benchmark]: Boogie Preprocessor took 145.29 ms. Allocated memory is still 2.2 GB. Free memory is still 2.1 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:14:13,748 INFO L168 Benchmark]: RCFGBuilder took 5372.87 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 251.1 MB). Peak memory consumption was 251.1 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:13,748 INFO L168 Benchmark]: TraceAbstraction took 210868.46 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 3.1 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-07 07:14:13,753 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1245.65 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 212.63 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 709.9 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -835.0 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.29 ms. Allocated memory is still 2.2 GB. Free memory is still 2.1 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5372.87 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 251.1 MB). Peak memory consumption was 251.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210868.46 ms. Allocated memory was 2.2 GB in the beginning and 4.6 GB in the end (delta: 2.4 GB). Free memory was 1.9 GB in the beginning and 3.1 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1593]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1593). Cancelled while BasicCegarLoop was analyzing trace of length 380 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 9 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 210.7s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 162.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2932 SDtfs, 22658 SDslu, 6013 SDs, 0 SdLazy, 21842 SolverSat, 6252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.3s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 3178 GetRequests, 2971 SyntacticMatches, 18 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154791occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.8s AbstIntTime, 9 AbstIntIterations, 4 AbstIntStrong, 0.9990180098218199 AbsIntWeakeningRatio, 0.24524714828897337 AbsIntAvgWeakeningVarsNumRemoved, 57.93441064638783 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 13.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 2079 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 3660 NumberOfCodeBlocks, 3660 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 4638 ConstructedInterpolants, 0 QuantifiedInterpolants, 2655306 SizeOfPredicates, 13 NumberOfNonLiveVariables, 4590 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 1153/1271 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown