java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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_label55_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:23:53,981 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:23:53,983 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:23:54,000 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:23:54,001 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:23:54,002 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:23:54,004 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:23:54,006 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:23:54,009 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:23:54,010 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:23:54,012 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:23:54,012 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:23:54,013 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:23:54,015 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:23:54,023 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:23:54,026 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:23:54,027 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:23:54,028 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:23:54,032 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:23:54,036 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:23:54,037 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:23:54,042 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:23:54,045 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:23:54,046 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:23:54,046 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:23:54,047 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:23:54,048 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:23:54,048 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:23:54,050 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:23:54,052 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:23:54,053 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:23:54,054 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:23:54,054 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:23:54,054 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:23:54,055 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:23:54,057 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:23:54,058 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 06:23:54,081 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:23:54,081 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:23:54,084 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 06:23:54,084 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 06:23:54,085 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 06:23:54,085 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 06:23:54,085 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 06:23:54,085 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 06:23:54,086 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 06:23:54,086 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 06:23:54,086 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 06:23:54,086 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 06:23:54,086 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 06:23:54,086 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 06:23:54,087 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:23:54,088 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:23:54,088 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:23:54,088 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 06:23:54,088 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 06:23:54,088 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 06:23:54,089 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:23:54,089 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 06:23:54,089 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:23:54,089 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:23:54,089 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 06:23:54,091 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 06:23:54,091 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 06:23:54,092 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:23:54,092 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 06:23:54,092 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 06:23:54,092 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 06:23:54,092 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 06:23:54,093 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 06:23:54,093 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 06:23:54,093 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 06:23:54,093 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 06:23:54,147 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:23:54,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:23:54,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:23:54,164 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:23:54,165 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:23:54,165 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-10-27 06:23:54,223 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c29b1440c/8ba20d262f4e4c129fe64cb90507a2c5/FLAG0b9340f99 [2018-10-27 06:23:54,903 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:23:54,904 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-10-27 06:23:54,938 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c29b1440c/8ba20d262f4e4c129fe64cb90507a2c5/FLAG0b9340f99 [2018-10-27 06:23:54,958 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c29b1440c/8ba20d262f4e4c129fe64cb90507a2c5 [2018-10-27 06:23:54,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:23:54,972 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 06:23:54,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:23:54,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:23:54,979 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:23:54,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:23:54" (1/1) ... [2018-10-27 06:23:54,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b8a232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:54, skipping insertion in model container [2018-10-27 06:23:54,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:23:54" (1/1) ... [2018-10-27 06:23:54,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:23:55,104 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:23:55,876 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:23:55,883 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:23:56,142 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:23:56,169 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:23:56,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56 WrapperNode [2018-10-27 06:23:56,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:23:56,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:23:56,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:23:56,171 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:23:56,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:23:56,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:23:56,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:23:56,495 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:23:56,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... [2018-10-27 06:23:56,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:23:56,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:23:56,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:23:56,612 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:23:56,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 06:23:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 06:23:56,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 06:23:56,675 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 06:23:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 06:23:56,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:23:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:23:56,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 06:23:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 06:24:01,453 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:24:01,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:24:01 BoogieIcfgContainer [2018-10-27 06:24:01,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:24:01,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 06:24:01,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 06:24:01,459 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 06:24:01,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:23:54" (1/3) ... [2018-10-27 06:24:01,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b27edb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:24:01, skipping insertion in model container [2018-10-27 06:24:01,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:23:56" (2/3) ... [2018-10-27 06:24:01,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b27edb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:24:01, skipping insertion in model container [2018-10-27 06:24:01,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:24:01" (3/3) ... [2018-10-27 06:24:01,463 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label55_true-unreach-call.c [2018-10-27 06:24:01,474 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 06:24:01,483 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 06:24:01,501 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 06:24:01,553 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 06:24:01,554 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 06:24:01,554 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 06:24:01,554 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:24:01,554 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:24:01,554 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 06:24:01,554 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:24:01,555 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 06:24:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 06:24:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-27 06:24:01,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:01,627 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] [2018-10-27 06:24:01,630 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:01,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1276853404, now seen corresponding path program 1 times [2018-10-27 06:24:01,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:01,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:01,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:01,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:01,690 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:02,537 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:24:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:02,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:02,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:24:02,800 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:02,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:24:02,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:24:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:02,828 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 06:24:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:05,281 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-10-27 06:24:05,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:24:05,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2018-10-27 06:24:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:05,311 INFO L225 Difference]: With dead ends: 844 [2018-10-27 06:24:05,311 INFO L226 Difference]: Without dead ends: 530 [2018-10-27 06:24:05,319 INFO L605 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 [2018-10-27 06:24:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-10-27 06:24:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-10-27 06:24:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-10-27 06:24:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-10-27 06:24:05,423 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 169 [2018-10-27 06:24:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:05,424 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-10-27 06:24:05,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:24:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-10-27 06:24:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-27 06:24:05,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:05,441 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] [2018-10-27 06:24:05,447 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:05,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash 15466080, now seen corresponding path program 1 times [2018-10-27 06:24:05,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:05,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:05,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:05,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:05,453 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:06,013 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:06,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:24:06,013 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:06,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:24:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:24:06,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:06,019 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-10-27 06:24:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:07,874 INFO L93 Difference]: Finished difference Result 1473 states and 2496 transitions. [2018-10-27 06:24:07,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:24:07,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 182 [2018-10-27 06:24:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:07,883 INFO L225 Difference]: With dead ends: 1473 [2018-10-27 06:24:07,884 INFO L226 Difference]: Without dead ends: 954 [2018-10-27 06:24:07,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:24:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-10-27 06:24:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 952. [2018-10-27 06:24:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-10-27 06:24:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1496 transitions. [2018-10-27 06:24:07,934 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1496 transitions. Word has length 182 [2018-10-27 06:24:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:07,935 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1496 transitions. [2018-10-27 06:24:07,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:24:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1496 transitions. [2018-10-27 06:24:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-27 06:24:07,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:07,940 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:24:07,940 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:07,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1708917764, now seen corresponding path program 1 times [2018-10-27 06:24:07,941 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:07,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:07,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:07,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:07,942 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:08,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:08,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:24:08,441 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:08,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 06:24:08,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 06:24:08,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-27 06:24:08,443 INFO L87 Difference]: Start difference. First operand 952 states and 1496 transitions. Second operand 5 states. [2018-10-27 06:24:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:12,918 INFO L93 Difference]: Finished difference Result 4008 states and 6512 transitions. [2018-10-27 06:24:12,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 06:24:12,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2018-10-27 06:24:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:12,959 INFO L225 Difference]: With dead ends: 4008 [2018-10-27 06:24:12,959 INFO L226 Difference]: Without dead ends: 3062 [2018-10-27 06:24:12,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-27 06:24:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2018-10-27 06:24:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3052. [2018-10-27 06:24:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3052 states. [2018-10-27 06:24:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4689 transitions. [2018-10-27 06:24:13,119 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4689 transitions. Word has length 184 [2018-10-27 06:24:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:13,120 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 4689 transitions. [2018-10-27 06:24:13,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 06:24:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4689 transitions. [2018-10-27 06:24:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-27 06:24:13,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:13,136 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 06:24:13,136 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:13,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1523085736, now seen corresponding path program 1 times [2018-10-27 06:24:13,137 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:13,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:13,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:13,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:13,139 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:13,414 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 06:24:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:13,587 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:13,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-27 06:24:13,588 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:13,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 06:24:13,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 06:24:13,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:24:13,590 INFO L87 Difference]: Start difference. First operand 3052 states and 4689 transitions. Second operand 7 states. [2018-10-27 06:24:16,536 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 06:24:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:17,949 INFO L93 Difference]: Finished difference Result 9246 states and 16253 transitions. [2018-10-27 06:24:17,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 06:24:17,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2018-10-27 06:24:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:18,022 INFO L225 Difference]: With dead ends: 9246 [2018-10-27 06:24:18,023 INFO L226 Difference]: Without dead ends: 6200 [2018-10-27 06:24:18,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-27 06:24:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2018-10-27 06:24:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 5920. [2018-10-27 06:24:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5920 states. [2018-10-27 06:24:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 9451 transitions. [2018-10-27 06:24:18,350 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 9451 transitions. Word has length 186 [2018-10-27 06:24:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:18,351 INFO L481 AbstractCegarLoop]: Abstraction has 5920 states and 9451 transitions. [2018-10-27 06:24:18,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 06:24:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 9451 transitions. [2018-10-27 06:24:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-27 06:24:18,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:18,370 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] [2018-10-27 06:24:18,370 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:18,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1271032685, now seen corresponding path program 1 times [2018-10-27 06:24:18,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:18,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:18,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:18,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:18,372 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:18,605 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 06:24:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:19,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:24:19,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 06:24:19,035 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:19,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 06:24:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:24:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:24:19,038 INFO L87 Difference]: Start difference. First operand 5920 states and 9451 transitions. Second operand 6 states. [2018-10-27 06:24:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:25,393 INFO L93 Difference]: Finished difference Result 18028 states and 31530 transitions. [2018-10-27 06:24:25,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 06:24:25,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2018-10-27 06:24:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:25,510 INFO L225 Difference]: With dead ends: 18028 [2018-10-27 06:24:25,510 INFO L226 Difference]: Without dead ends: 12114 [2018-10-27 06:24:25,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:24:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12114 states. [2018-10-27 06:24:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12114 to 11840. [2018-10-27 06:24:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11840 states. [2018-10-27 06:24:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11840 states to 11840 states and 19227 transitions. [2018-10-27 06:24:26,095 INFO L78 Accepts]: Start accepts. Automaton has 11840 states and 19227 transitions. Word has length 187 [2018-10-27 06:24:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:26,095 INFO L481 AbstractCegarLoop]: Abstraction has 11840 states and 19227 transitions. [2018-10-27 06:24:26,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 06:24:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 11840 states and 19227 transitions. [2018-10-27 06:24:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-27 06:24:26,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:26,133 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:24:26,134 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:26,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1769410092, now seen corresponding path program 1 times [2018-10-27 06:24:26,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:26,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:26,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:26,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:26,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:26,524 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-27 06:24:26,746 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 06:24:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:27,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:24:27,103 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:24:27,104 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 200 with the following transitions: [2018-10-27 06:24:27,107 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:24:27,173 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:24:27,174 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:24:28,197 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:24:28,199 INFO L272 AbstractInterpreter]: Visited 170 different actions 170 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 06:24:28,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:28,235 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:24:29,285 INFO L227 lantSequenceWeakener]: Weakened 190 states. On average, predicates are now at 71.62% of their original sizes. [2018-10-27 06:24:29,286 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:24:29,864 INFO L415 sIntCurrentIteration]: We unified 198 AI predicates to 198 [2018-10-27 06:24:29,864 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:24:29,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:24:29,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2018-10-27 06:24:29,866 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:24:29,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 06:24:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 06:24:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-10-27 06:24:29,868 INFO L87 Difference]: Start difference. First operand 11840 states and 19227 transitions. Second operand 13 states. [2018-10-27 06:24:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:45,091 INFO L93 Difference]: Finished difference Result 23884 states and 38808 transitions. [2018-10-27 06:24:45,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:24:45,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 199 [2018-10-27 06:24:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:45,144 INFO L225 Difference]: With dead ends: 23884 [2018-10-27 06:24:45,144 INFO L226 Difference]: Without dead ends: 12050 [2018-10-27 06:24:45,184 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 199 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:24:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12050 states. [2018-10-27 06:24:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12050 to 12048. [2018-10-27 06:24:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12048 states. [2018-10-27 06:24:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 19444 transitions. [2018-10-27 06:24:45,543 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 19444 transitions. Word has length 199 [2018-10-27 06:24:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:24:45,544 INFO L481 AbstractCegarLoop]: Abstraction has 12048 states and 19444 transitions. [2018-10-27 06:24:45,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 06:24:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 19444 transitions. [2018-10-27 06:24:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-27 06:24:45,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:24:45,579 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:24:45,579 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:24:45,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash 515488759, now seen corresponding path program 1 times [2018-10-27 06:24:45,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:24:45,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:45,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:45,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:24:45,581 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:24:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:46,110 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 06:24:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:24:46,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:24:46,305 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:24:46,305 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-10-27 06:24:46,305 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:24:46,318 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:24:46,318 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:24:47,062 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:24:47,062 INFO L272 AbstractInterpreter]: Visited 174 different actions 340 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:24:47,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:24:47,070 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:24:47,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:24:47,070 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 06:24:47,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:24:47,089 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:24:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:24:47,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:24:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:24:47,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:24:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:24:48,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:24:48,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-10-27 06:24:48,662 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:24:48,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 06:24:48,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 06:24:48,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:24:48,664 INFO L87 Difference]: Start difference. First operand 12048 states and 19444 transitions. Second operand 8 states. [2018-10-27 06:24:49,720 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-27 06:24:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:24:59,002 INFO L93 Difference]: Finished difference Result 41321 states and 80839 transitions. [2018-10-27 06:24:59,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-27 06:24:59,007 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 208 [2018-10-27 06:24:59,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:24:59,205 INFO L225 Difference]: With dead ends: 41321 [2018-10-27 06:24:59,205 INFO L226 Difference]: Without dead ends: 29487 [2018-10-27 06:24:59,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 430 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2018-10-27 06:24:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29487 states. [2018-10-27 06:25:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29487 to 28552. [2018-10-27 06:25:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28552 states. [2018-10-27 06:25:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28552 states to 28552 states and 42359 transitions. [2018-10-27 06:25:00,865 INFO L78 Accepts]: Start accepts. Automaton has 28552 states and 42359 transitions. Word has length 208 [2018-10-27 06:25:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:25:00,865 INFO L481 AbstractCegarLoop]: Abstraction has 28552 states and 42359 transitions. [2018-10-27 06:25:00,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 06:25:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 28552 states and 42359 transitions. [2018-10-27 06:25:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-27 06:25:01,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:25:01,233 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 06:25:01,233 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:25:01,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1272963469, now seen corresponding path program 1 times [2018-10-27 06:25:01,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:25:01,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:01,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:25:01,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:01,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:25:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:25:01,519 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:25:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 06:25:01,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:25:01,974 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:25:01,975 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2018-10-27 06:25:01,975 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [65], [68], [73], [75], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:25:01,982 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:25:01,982 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:25:02,827 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:25:02,828 INFO L272 AbstractInterpreter]: Visited 174 different actions 342 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:25:02,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:02,863 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:25:03,584 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 71.95% of their original sizes. [2018-10-27 06:25:03,584 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:25:04,052 INFO L415 sIntCurrentIteration]: We unified 222 AI predicates to 222 [2018-10-27 06:25:04,052 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:25:04,053 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:25:04,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-10-27 06:25:04,053 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:25:04,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 06:25:04,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 06:25:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-10-27 06:25:04,056 INFO L87 Difference]: Start difference. First operand 28552 states and 42359 transitions. Second operand 19 states. [2018-10-27 06:25:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:25:20,046 INFO L93 Difference]: Finished difference Result 54526 states and 81181 transitions. [2018-10-27 06:25:20,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 06:25:20,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 223 [2018-10-27 06:25:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:25:20,139 INFO L225 Difference]: With dead ends: 54526 [2018-10-27 06:25:20,139 INFO L226 Difference]: Without dead ends: 26188 [2018-10-27 06:25:20,191 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 231 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2018-10-27 06:25:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26188 states. [2018-10-27 06:25:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26188 to 26177. [2018-10-27 06:25:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26177 states. [2018-10-27 06:25:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26177 states to 26177 states and 38844 transitions. [2018-10-27 06:25:20,857 INFO L78 Accepts]: Start accepts. Automaton has 26177 states and 38844 transitions. Word has length 223 [2018-10-27 06:25:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:25:20,858 INFO L481 AbstractCegarLoop]: Abstraction has 26177 states and 38844 transitions. [2018-10-27 06:25:20,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-27 06:25:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 26177 states and 38844 transitions. [2018-10-27 06:25:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-27 06:25:20,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:25:20,900 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2018-10-27 06:25:20,901 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:25:20,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1496366192, now seen corresponding path program 1 times [2018-10-27 06:25:20,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:25:20,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:20,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:25:20,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:20,905 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:25:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:25:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 94 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-10-27 06:25:21,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:25:21,405 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:25:21,405 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-10-27 06:25:21,406 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [48], [49], [53], [57], [61], [64], [65], [68], [73], [75], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:25:21,411 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:25:21,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:25:22,486 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:25:22,487 INFO L272 AbstractInterpreter]: Visited 176 different actions 344 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:25:22,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:22,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:25:22,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:25:22,496 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 06:25:22,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:25:22,506 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:25:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:25:22,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:25:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 141 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-27 06:25:22,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:25:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 143 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-27 06:25:23,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:25:23,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 06:25:23,026 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:25:23,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 06:25:23,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:25:23,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:25:23,027 INFO L87 Difference]: Start difference. First operand 26177 states and 38844 transitions. Second operand 9 states. [2018-10-27 06:25:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:25:25,357 INFO L93 Difference]: Finished difference Result 42858 states and 63387 transitions. [2018-10-27 06:25:25,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 06:25:25,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 251 [2018-10-27 06:25:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:25:25,405 INFO L225 Difference]: With dead ends: 42858 [2018-10-27 06:25:25,406 INFO L226 Difference]: Without dead ends: 17106 [2018-10-27 06:25:25,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 501 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-27 06:25:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17106 states. [2018-10-27 06:25:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17106 to 14574. [2018-10-27 06:25:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14574 states. [2018-10-27 06:25:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14574 states to 14574 states and 18426 transitions. [2018-10-27 06:25:25,780 INFO L78 Accepts]: Start accepts. Automaton has 14574 states and 18426 transitions. Word has length 251 [2018-10-27 06:25:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:25:25,781 INFO L481 AbstractCegarLoop]: Abstraction has 14574 states and 18426 transitions. [2018-10-27 06:25:25,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 06:25:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 14574 states and 18426 transitions. [2018-10-27 06:25:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-27 06:25:25,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:25:25,792 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:25:25,792 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:25:25,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1460650671, now seen corresponding path program 1 times [2018-10-27 06:25:25,792 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:25:25,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:25,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:25:25,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:25,794 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:25:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:25:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 101 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 06:25:26,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:25:26,190 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:25:26,190 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 255 with the following transitions: [2018-10-27 06:25:26,191 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [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], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:25:26,195 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:25:26,195 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:25:26,784 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:25:26,784 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:25:26,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:26,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:25:26,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:25:26,820 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 06:25:26,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:25:26,831 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:25:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:25:27,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:25:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 06:25:27,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:25:27,833 WARN L179 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-10-27 06:25:28,032 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-27 06:25:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 06:25:28,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:25:28,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-10-27 06:25:28,258 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:25:28,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:25:28,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:25:28,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-10-27 06:25:28,259 INFO L87 Difference]: Start difference. First operand 14574 states and 18426 transitions. Second operand 12 states. [2018-10-27 06:25:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:25:40,755 INFO L93 Difference]: Finished difference Result 56529 states and 84108 transitions. [2018-10-27 06:25:40,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-27 06:25:40,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 254 [2018-10-27 06:25:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:25:41,009 INFO L225 Difference]: With dead ends: 56529 [2018-10-27 06:25:41,009 INFO L226 Difference]: Without dead ends: 42380 [2018-10-27 06:25:41,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 569 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1361, Invalid=7011, Unknown=0, NotChecked=0, Total=8372 [2018-10-27 06:25:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42380 states. [2018-10-27 06:25:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42380 to 38550. [2018-10-27 06:25:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38550 states. [2018-10-27 06:25:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38550 states to 38550 states and 48641 transitions. [2018-10-27 06:25:42,318 INFO L78 Accepts]: Start accepts. Automaton has 38550 states and 48641 transitions. Word has length 254 [2018-10-27 06:25:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:25:42,319 INFO L481 AbstractCegarLoop]: Abstraction has 38550 states and 48641 transitions. [2018-10-27 06:25:42,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:25:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 38550 states and 48641 transitions. [2018-10-27 06:25:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-27 06:25:42,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:25:42,336 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 06:25:42,336 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:25:42,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash 753374301, now seen corresponding path program 1 times [2018-10-27 06:25:42,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:25:42,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:42,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:25:42,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:25:42,338 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:25:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:25:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:25:43,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:25:43,247 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:25:43,247 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2018-10-27 06:25:43,247 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], [131], [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], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:25:43,253 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:25:43,253 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:25:44,113 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:25:44,113 INFO L272 AbstractInterpreter]: Visited 173 different actions 340 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:25:44,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:25:44,120 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:25:44,823 INFO L227 lantSequenceWeakener]: Weakened 304 states. On average, predicates are now at 72.46% of their original sizes. [2018-10-27 06:25:44,824 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:25:45,138 INFO L415 sIntCurrentIteration]: We unified 306 AI predicates to 306 [2018-10-27 06:25:45,138 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:25:45,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:25:45,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-10-27 06:25:45,139 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:25:45,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 06:25:45,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 06:25:45,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-10-27 06:25:45,140 INFO L87 Difference]: Start difference. First operand 38550 states and 48641 transitions. Second operand 19 states. [2018-10-27 06:26:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:26:05,630 INFO L93 Difference]: Finished difference Result 86290 states and 110680 transitions. [2018-10-27 06:26:05,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 06:26:05,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 307 [2018-10-27 06:26:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:26:05,742 INFO L225 Difference]: With dead ends: 86290 [2018-10-27 06:26:05,743 INFO L226 Difference]: Without dead ends: 48165 [2018-10-27 06:26:05,790 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 314 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2018-10-27 06:26:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48165 states. [2018-10-27 06:26:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48165 to 48124. [2018-10-27 06:26:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48124 states. [2018-10-27 06:26:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48124 states to 48124 states and 59748 transitions. [2018-10-27 06:26:06,759 INFO L78 Accepts]: Start accepts. Automaton has 48124 states and 59748 transitions. Word has length 307 [2018-10-27 06:26:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:26:06,760 INFO L481 AbstractCegarLoop]: Abstraction has 48124 states and 59748 transitions. [2018-10-27 06:26:06,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-27 06:26:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 48124 states and 59748 transitions. [2018-10-27 06:26:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-27 06:26:06,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:26:06,789 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 06:26:06,789 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:26:06,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1369611910, now seen corresponding path program 1 times [2018-10-27 06:26:06,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:26:06,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:06,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:06,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:06,791 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:26:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 147 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:26:07,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:07,945 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:26:07,945 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 320 with the following transitions: [2018-10-27 06:26:07,946 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], [131], [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], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:26:07,952 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:26:07,952 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:26:09,413 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:26:09,413 INFO L272 AbstractInterpreter]: Visited 175 different actions 700 times. Merged at 8 different actions 36 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:26:09,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:09,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:26:09,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:09,423 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 06:26:09,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:09,431 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:26:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:09,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:26:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-10-27 06:26:09,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:26:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 156 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 06:26:10,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:26:10,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 06:26:10,474 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:26:10,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:26:10,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:26:10,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:26:10,475 INFO L87 Difference]: Start difference. First operand 48124 states and 59748 transitions. Second operand 12 states. [2018-10-27 06:26:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:26:21,319 INFO L93 Difference]: Finished difference Result 170543 states and 227747 transitions. [2018-10-27 06:26:21,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-27 06:26:21,319 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 319 [2018-10-27 06:26:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:26:21,810 INFO L225 Difference]: With dead ends: 170543 [2018-10-27 06:26:21,810 INFO L226 Difference]: Without dead ends: 122843 [2018-10-27 06:26:21,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 669 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=497, Invalid=1855, Unknown=0, NotChecked=0, Total=2352 [2018-10-27 06:26:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122843 states. [2018-10-27 06:26:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122843 to 120270. [2018-10-27 06:26:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120270 states. [2018-10-27 06:26:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120270 states to 120270 states and 158159 transitions. [2018-10-27 06:26:25,594 INFO L78 Accepts]: Start accepts. Automaton has 120270 states and 158159 transitions. Word has length 319 [2018-10-27 06:26:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:26:25,594 INFO L481 AbstractCegarLoop]: Abstraction has 120270 states and 158159 transitions. [2018-10-27 06:26:25,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:26:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 120270 states and 158159 transitions. [2018-10-27 06:26:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-10-27 06:26:25,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:26:25,727 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:26:25,727 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:26:25,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash -781090284, now seen corresponding path program 1 times [2018-10-27 06:26:25,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:26:25,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:25,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:25,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:25,728 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:26:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 328 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:26:26,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:26,203 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:26:26,203 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 398 with the following transitions: [2018-10-27 06:26:26,203 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], [111], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [213], [218], [220], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:26:26,208 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:26:26,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:26:27,673 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:26:27,673 INFO L272 AbstractInterpreter]: Visited 180 different actions 710 times. Merged at 9 different actions 33 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 4 different actions. Largest state had 88 variables. [2018-10-27 06:26:27,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:27,681 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:26:27,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:27,681 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 06:26:27,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:27,690 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:26:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:27,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:26:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-10-27 06:26:28,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:26:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-10-27 06:26:28,227 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:26:28,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2018-10-27 06:26:28,228 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:26:28,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:26:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:26:28,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-27 06:26:28,229 INFO L87 Difference]: Start difference. First operand 120270 states and 158159 transitions. Second operand 3 states. [2018-10-27 06:26:31,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:26:31,624 INFO L93 Difference]: Finished difference Result 253084 states and 336472 transitions. [2018-10-27 06:26:31,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:26:31,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 397 [2018-10-27 06:26:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:26:32,180 INFO L225 Difference]: With dead ends: 253084 [2018-10-27 06:26:32,180 INFO L226 Difference]: Without dead ends: 133454 [2018-10-27 06:26:32,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 792 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-27 06:26:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133454 states. [2018-10-27 06:26:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133454 to 128775. [2018-10-27 06:26:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128775 states. [2018-10-27 06:26:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128775 states to 128775 states and 167989 transitions. [2018-10-27 06:26:36,206 INFO L78 Accepts]: Start accepts. Automaton has 128775 states and 167989 transitions. Word has length 397 [2018-10-27 06:26:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:26:36,206 INFO L481 AbstractCegarLoop]: Abstraction has 128775 states and 167989 transitions. [2018-10-27 06:26:36,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:26:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 128775 states and 167989 transitions. [2018-10-27 06:26:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-10-27 06:26:36,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:26:36,330 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:26:36,330 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:26:36,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash 550870557, now seen corresponding path program 1 times [2018-10-27 06:26:36,330 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:26:36,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:36,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:36,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:26:36,331 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:26:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 267 proven. 201 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-27 06:26:37,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:37,358 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:26:37,358 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 438 with the following transitions: [2018-10-27 06:26:37,358 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], [123], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [213], [216], [220], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:26:37,362 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:26:37,362 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:26:38,529 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:26:38,530 INFO L272 AbstractInterpreter]: Visited 180 different actions 713 times. Merged at 9 different actions 33 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 4 different actions. Largest state had 88 variables. [2018-10-27 06:26:38,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:26:38,535 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:26:38,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:26:38,535 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:26:38,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:26:38,545 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:26:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:26:38,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:26:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 338 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-27 06:26:39,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:26:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 273 proven. 101 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-10-27 06:26:39,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:26:39,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2018-10-27 06:26:39,462 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:26:39,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:26:39,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:26:39,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-27 06:26:39,464 INFO L87 Difference]: Start difference. First operand 128775 states and 167989 transitions. Second operand 12 states. [2018-10-27 06:26:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:26:54,233 INFO L93 Difference]: Finished difference Result 564905 states and 755762 transitions. [2018-10-27 06:26:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-27 06:26:54,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 437 [2018-10-27 06:26:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:26:56,214 INFO L225 Difference]: With dead ends: 564905 [2018-10-27 06:26:56,214 INFO L226 Difference]: Without dead ends: 438014 [2018-10-27 06:26:57,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 885 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2018-10-27 06:26:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438014 states. [2018-10-27 06:27:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438014 to 431966. [2018-10-27 06:27:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431966 states. [2018-10-27 06:27:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431966 states to 431966 states and 575353 transitions. [2018-10-27 06:27:16,478 INFO L78 Accepts]: Start accepts. Automaton has 431966 states and 575353 transitions. Word has length 437 [2018-10-27 06:27:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:27:16,479 INFO L481 AbstractCegarLoop]: Abstraction has 431966 states and 575353 transitions. [2018-10-27 06:27:16,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:27:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 431966 states and 575353 transitions. [2018-10-27 06:27:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-10-27 06:27:16,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:27:16,782 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:27:16,782 INFO L424 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:27:16,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:27:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1648236459, now seen corresponding path program 1 times [2018-10-27 06:27:16,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:27:16,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:27:16,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:27:16,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:27:16,783 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:27:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:27:17,420 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 06:27:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 323 proven. 124 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-10-27 06:27:17,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:27:17,694 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:27:17,695 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 457 with the following transitions: [2018-10-27 06:27:17,695 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], [123], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [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], [562], [567], [569], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:27:17,700 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:27:17,700 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:27:18,626 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:27:18,626 INFO L272 AbstractInterpreter]: Visited 179 different actions 531 times. Merged at 8 different actions 20 times. Never widened. Found 6 fixpoints after 5 different actions. Largest state had 88 variables. [2018-10-27 06:27:18,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:27:18,663 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:27:18,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:27:18,663 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:27:18,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:27:18,675 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:27:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:27:19,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:27:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 468 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-10-27 06:27:20,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:27:21,024 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-27 06:27:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 389 proven. 34 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2018-10-27 06:27:21,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:27:21,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 06:27:21,229 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:27:21,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 06:27:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:27:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:27:21,231 INFO L87 Difference]: Start difference. First operand 431966 states and 575353 transitions. Second operand 9 states. Received shutdown request... [2018-10-27 06:27:21,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 06:27:21,787 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 06:27:21,795 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 06:27:21,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 06:27:21 BoogieIcfgContainer [2018-10-27 06:27:21,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 06:27:21,797 INFO L168 Benchmark]: Toolchain (without parser) took 206826.37 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.4 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-27 06:27:21,798 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 06:27:21,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1197.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-27 06:27:21,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 323.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -879.2 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-27 06:27:21,800 INFO L168 Benchmark]: Boogie Preprocessor took 116.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-10-27 06:27:21,800 INFO L168 Benchmark]: RCFGBuilder took 4842.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 264.1 MB). Peak memory consumption was 264.1 MB. Max. memory is 7.1 GB. [2018-10-27 06:27:21,801 INFO L168 Benchmark]: TraceAbstraction took 200340.52 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -572.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-27 06:27:21,806 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1197.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 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 323.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -879.2 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4842.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 264.1 MB). Peak memory consumption was 264.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 200340.52 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -572.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1521]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1521). Cancelled while BasicCegarLoop was constructing difference of abstraction (431966states) and FLOYD_HOARE automaton (currently 11 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (280 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 200.2s OverallTime, 15 OverallIterations, 7 TraceHistogramMax, 131.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3789 SDtfs, 30402 SDslu, 5170 SDs, 0 SdLazy, 37271 SolverSat, 7899 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.8s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 5804 GetRequests, 5447 SyntacticMatches, 29 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4589 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=431966occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.4s AbstIntTime, 10 AbstIntIterations, 3 AbstIntStrong, 0.999017520246884 AbsIntWeakeningRatio, 0.2727272727272727 AbsIntAvgWeakeningVarsNumRemoved, 56.684573002754824 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 32.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 21222 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 6281 NumberOfCodeBlocks, 6281 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 8574 ConstructedInterpolants, 0 QuantifiedInterpolants, 6773649 SizeOfPredicates, 13 NumberOfNonLiveVariables, 10089 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 29 InterpolantComputations, 7 PerfectInterpolantSequences, 5852/6563 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown