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_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:15:12,007 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:15:12,009 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:15:12,022 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:15:12,022 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:15:12,023 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:15:12,025 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:15:12,027 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:15:12,028 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:15:12,029 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:15:12,030 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:15:12,031 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:15:12,032 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:15:12,033 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:15:12,034 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:15:12,035 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:15:12,036 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:15:12,038 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:15:12,040 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:15:12,041 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:15:12,042 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:15:12,044 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:15:12,046 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:15:12,047 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:15:12,047 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:15:12,048 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:15:12,049 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:15:12,050 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:15:12,050 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:15:12,052 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:15:12,052 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:15:12,053 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:15:12,053 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:15:12,053 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:15:12,054 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:15:12,055 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:15:12,055 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 06:15:12,083 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:15:12,083 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:15:12,086 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 06:15:12,086 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 06:15:12,086 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 06:15:12,087 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 06:15:12,087 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 06:15:12,087 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 06:15:12,088 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 06:15:12,088 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 06:15:12,088 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 06:15:12,088 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 06:15:12,088 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 06:15:12,088 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 06:15:12,089 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:15:12,090 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:15:12,090 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:15:12,090 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 06:15:12,090 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 06:15:12,090 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 06:15:12,091 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:15:12,091 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 06:15:12,091 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:15:12,091 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:15:12,091 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 06:15:12,092 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 06:15:12,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 06:15:12,093 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:15:12,093 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 06:15:12,093 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 06:15:12,093 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 06:15:12,093 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 06:15:12,094 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 06:15:12,094 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 06:15:12,094 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 06:15:12,094 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 06:15:12,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:15:12,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:15:12,176 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:15:12,178 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:15:12,178 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:15:12,179 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label05_true-unreach-call.c [2018-10-27 06:15:12,246 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1208ebb5c/edc184aac39a43c2a1d7af25cc52c516/FLAG39dd6f209 [2018-10-27 06:15:12,911 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:15:12,912 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label05_true-unreach-call.c [2018-10-27 06:15:12,928 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1208ebb5c/edc184aac39a43c2a1d7af25cc52c516/FLAG39dd6f209 [2018-10-27 06:15:12,943 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1208ebb5c/edc184aac39a43c2a1d7af25cc52c516 [2018-10-27 06:15:12,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:15:12,956 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 06:15:12,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:15:12,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:15:12,961 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:15:12,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:15:12" (1/1) ... [2018-10-27 06:15:12,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7d78d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:12, skipping insertion in model container [2018-10-27 06:15:12,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:15:12" (1/1) ... [2018-10-27 06:15:12,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:15:13,066 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:15:13,758 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:15:13,764 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:15:14,043 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:15:14,069 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:15:14,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14 WrapperNode [2018-10-27 06:15:14,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:15:14,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:15:14,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:15:14,071 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:15:14,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:15:14,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:15:14,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:15:14,396 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:15:14,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (1/1) ... [2018-10-27 06:15:14,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:15:14,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:15:14,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:15:14,550 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:15:14,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (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 06:15:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 06:15:14,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 06:15:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 06:15:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 06:15:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:15:14,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:15:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 06:15:14,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 06:15:20,388 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:15:20,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:15:20 BoogieIcfgContainer [2018-10-27 06:15:20,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:15:20,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 06:15:20,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 06:15:20,394 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 06:15:20,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:15:12" (1/3) ... [2018-10-27 06:15:20,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308e53f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:15:20, skipping insertion in model container [2018-10-27 06:15:20,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:14" (2/3) ... [2018-10-27 06:15:20,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308e53f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:15:20, skipping insertion in model container [2018-10-27 06:15:20,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:15:20" (3/3) ... [2018-10-27 06:15:20,398 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label05_true-unreach-call.c [2018-10-27 06:15:20,409 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 06:15:20,419 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 06:15:20,438 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 06:15:20,486 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 06:15:20,487 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 06:15:20,487 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 06:15:20,487 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:15:20,487 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:15:20,488 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 06:15:20,488 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:15:20,488 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 06:15:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 06:15:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-27 06:15:20,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:20,560 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] [2018-10-27 06:15:20,565 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:20,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:20,572 INFO L82 PathProgramCache]: Analyzing trace with hash -49135596, now seen corresponding path program 1 times [2018-10-27 06:15:20,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:20,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:20,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:20,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:20,639 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:21,577 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:15:21,799 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 06:15:21,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:15:21,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:15:21,802 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:21,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:15:21,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:15:21,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:15:21,828 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 06:15:24,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:15:24,623 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-10-27 06:15:24,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:15:24,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2018-10-27 06:15:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:15:24,649 INFO L225 Difference]: With dead ends: 838 [2018-10-27 06:15:24,650 INFO L226 Difference]: Without dead ends: 524 [2018-10-27 06:15:24,658 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 06:15:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-10-27 06:15:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-10-27 06:15:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-10-27 06:15:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-10-27 06:15:24,748 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 165 [2018-10-27 06:15:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:15:24,749 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-10-27 06:15:24,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:15:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-10-27 06:15:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-27 06:15:24,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:24,757 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:15:24,757 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:24,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1507813107, now seen corresponding path program 1 times [2018-10-27 06:15:24,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:24,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:24,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:24,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:24,760 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:15:25,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:15:25,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 06:15:25,067 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:25,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 06:15:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:15:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:15:25,073 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-10-27 06:15:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:15:28,619 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-10-27 06:15:28,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 06:15:28,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2018-10-27 06:15:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:15:28,633 INFO L225 Difference]: With dead ends: 1581 [2018-10-27 06:15:28,634 INFO L226 Difference]: Without dead ends: 1065 [2018-10-27 06:15:28,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:15:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-10-27 06:15:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-10-27 06:15:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-10-27 06:15:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-10-27 06:15:28,731 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 175 [2018-10-27 06:15:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:15:28,731 INFO L481 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-10-27 06:15:28,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 06:15:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-10-27 06:15:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-27 06:15:28,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:28,739 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] [2018-10-27 06:15:28,740 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:28,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:28,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2079958768, now seen corresponding path program 1 times [2018-10-27 06:15:28,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:28,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:28,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:28,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:28,742 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:29,009 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 06:15:29,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:15:29,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:15:29,010 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:29,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:15:29,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:15:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:15:29,011 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-10-27 06:15:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:15:31,771 INFO L93 Difference]: Finished difference Result 2887 states and 5063 transitions. [2018-10-27 06:15:31,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:15:31,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2018-10-27 06:15:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:15:31,795 INFO L225 Difference]: With dead ends: 2887 [2018-10-27 06:15:31,796 INFO L226 Difference]: Without dead ends: 1870 [2018-10-27 06:15:31,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:15:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2018-10-27 06:15:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1865. [2018-10-27 06:15:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2018-10-27 06:15:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 3055 transitions. [2018-10-27 06:15:31,884 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 3055 transitions. Word has length 178 [2018-10-27 06:15:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:15:31,885 INFO L481 AbstractCegarLoop]: Abstraction has 1865 states and 3055 transitions. [2018-10-27 06:15:31,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:15:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 3055 transitions. [2018-10-27 06:15:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-27 06:15:31,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:31,893 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:15:31,893 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:31,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash -267064481, now seen corresponding path program 1 times [2018-10-27 06:15:31,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:31,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:31,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:31,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:31,895 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:32,239 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 06:15:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:15:32,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:15:32,349 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:15:32,351 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 199 with the following transitions: [2018-10-27 06:15:32,353 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], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:15:32,426 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:15:32,427 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:15:33,750 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:15:33,752 INFO L272 AbstractInterpreter]: Visited 165 different actions 165 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 06:15:33,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:33,800 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:15:34,835 INFO L227 lantSequenceWeakener]: Weakened 192 states. On average, predicates are now at 71.14% of their original sizes. [2018-10-27 06:15:34,835 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:15:35,305 INFO L415 sIntCurrentIteration]: We unified 197 AI predicates to 197 [2018-10-27 06:15:35,305 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:15:35,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:15:35,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2018-10-27 06:15:35,307 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:35,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 06:15:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 06:15:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-27 06:15:35,308 INFO L87 Difference]: Start difference. First operand 1865 states and 3055 transitions. Second operand 13 states. [2018-10-27 06:16:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:16:00,820 INFO L93 Difference]: Finished difference Result 3934 states and 6464 transitions. [2018-10-27 06:16:00,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:16:00,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 198 [2018-10-27 06:16:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:16:00,832 INFO L225 Difference]: With dead ends: 3934 [2018-10-27 06:16:00,833 INFO L226 Difference]: Without dead ends: 2075 [2018-10-27 06:16:00,838 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 198 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:16:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2018-10-27 06:16:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2073. [2018-10-27 06:16:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2018-10-27 06:16:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3272 transitions. [2018-10-27 06:16:00,894 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3272 transitions. Word has length 198 [2018-10-27 06:16:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:16:00,894 INFO L481 AbstractCegarLoop]: Abstraction has 2073 states and 3272 transitions. [2018-10-27 06:16:00,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 06:16:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3272 transitions. [2018-10-27 06:16:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-27 06:16:00,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:16:00,902 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:00,903 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:16:00,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash 129922850, now seen corresponding path program 1 times [2018-10-27 06:16:00,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:16:00,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:00,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:00,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:00,905 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:16:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:16:01,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:01,505 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:16:01,505 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-10-27 06:16:01,506 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], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:16:01,518 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:16:01,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:16:02,253 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:16:02,253 INFO L272 AbstractInterpreter]: Visited 169 different actions 332 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 06:16:02,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:02,261 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:16:03,009 INFO L227 lantSequenceWeakener]: Weakened 207 states. On average, predicates are now at 71.63% of their original sizes. [2018-10-27 06:16:03,009 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:16:03,349 INFO L415 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2018-10-27 06:16:03,349 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:16:03,349 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:16:03,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 22 [2018-10-27 06:16:03,349 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:16:03,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 06:16:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 06:16:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-10-27 06:16:03,351 INFO L87 Difference]: Start difference. First operand 2073 states and 3272 transitions. Second operand 20 states. [2018-10-27 06:16:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:16:29,682 INFO L93 Difference]: Finished difference Result 4148 states and 6689 transitions. [2018-10-27 06:16:29,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 06:16:29,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 210 [2018-10-27 06:16:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:16:29,694 INFO L225 Difference]: With dead ends: 4148 [2018-10-27 06:16:29,694 INFO L226 Difference]: Without dead ends: 2289 [2018-10-27 06:16:29,700 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 218 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2018-10-27 06:16:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2018-10-27 06:16:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2286. [2018-10-27 06:16:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2286 states. [2018-10-27 06:16:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3501 transitions. [2018-10-27 06:16:29,756 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3501 transitions. Word has length 210 [2018-10-27 06:16:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:16:29,757 INFO L481 AbstractCegarLoop]: Abstraction has 2286 states and 3501 transitions. [2018-10-27 06:16:29,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-27 06:16:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3501 transitions. [2018-10-27 06:16:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-27 06:16:29,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:16:29,765 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:29,765 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:16:29,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash 559717910, now seen corresponding path program 1 times [2018-10-27 06:16:29,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:16:29,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:29,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:29,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:29,767 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:16:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:16:30,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:30,263 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:16:30,263 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2018-10-27 06:16:30,268 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [135], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:16:30,285 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:16:30,286 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:16:31,069 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:16:31,069 INFO L272 AbstractInterpreter]: Visited 169 different actions 337 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 06:16:31,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:31,077 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:16:31,686 INFO L227 lantSequenceWeakener]: Weakened 222 states. On average, predicates are now at 73.73% of their original sizes. [2018-10-27 06:16:31,686 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:16:31,925 INFO L415 sIntCurrentIteration]: We unified 224 AI predicates to 224 [2018-10-27 06:16:31,925 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:16:31,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:16:31,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-10-27 06:16:31,926 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:16:31,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-27 06:16:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-27 06:16:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-27 06:16:31,927 INFO L87 Difference]: Start difference. First operand 2286 states and 3501 transitions. Second operand 16 states. [2018-10-27 06:16:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:16:58,919 INFO L93 Difference]: Finished difference Result 7614 states and 12736 transitions. [2018-10-27 06:16:58,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 06:16:58,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 225 [2018-10-27 06:16:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:16:58,948 INFO L225 Difference]: With dead ends: 7614 [2018-10-27 06:16:58,949 INFO L226 Difference]: Without dead ends: 5755 [2018-10-27 06:16:58,962 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2018-10-27 06:16:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2018-10-27 06:16:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5743. [2018-10-27 06:16:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5743 states. [2018-10-27 06:16:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5743 states to 5743 states and 8712 transitions. [2018-10-27 06:16:59,116 INFO L78 Accepts]: Start accepts. Automaton has 5743 states and 8712 transitions. Word has length 225 [2018-10-27 06:16:59,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:16:59,117 INFO L481 AbstractCegarLoop]: Abstraction has 5743 states and 8712 transitions. [2018-10-27 06:16:59,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-27 06:16:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5743 states and 8712 transitions. [2018-10-27 06:16:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-27 06:16:59,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:16:59,135 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:16:59,136 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:16:59,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:59,136 INFO L82 PathProgramCache]: Analyzing trace with hash 540442877, now seen corresponding path program 1 times [2018-10-27 06:16:59,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:16:59,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:59,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:59,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:59,137 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:16:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:59,397 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:16:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 92 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-27 06:16:59,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:59,635 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:16:59,635 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2018-10-27 06:16:59,636 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [24], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [135], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:16:59,644 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:16:59,644 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:00,518 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:17:00,519 INFO L272 AbstractInterpreter]: Visited 172 different actions 512 times. Merged at 8 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:17:00,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:00,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:17:00,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:00,521 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 06:17:00,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:00,531 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:17:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:00,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:17:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-27 06:17:01,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:17:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-27 06:17:02,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:17:02,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 06:17:02,585 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:17:02,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 06:17:02,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:17:02,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:17:02,587 INFO L87 Difference]: Start difference. First operand 5743 states and 8712 transitions. Second operand 9 states. [2018-10-27 06:17:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:07,892 INFO L93 Difference]: Finished difference Result 19360 states and 33684 transitions. [2018-10-27 06:17:07,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 06:17:07,892 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 238 [2018-10-27 06:17:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:17:07,999 INFO L225 Difference]: With dead ends: 19360 [2018-10-27 06:17:07,999 INFO L226 Difference]: Without dead ends: 14044 [2018-10-27 06:17:08,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 485 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2018-10-27 06:17:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14044 states. [2018-10-27 06:17:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14044 to 13601. [2018-10-27 06:17:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13601 states. [2018-10-27 06:17:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13601 states to 13601 states and 18896 transitions. [2018-10-27 06:17:08,515 INFO L78 Accepts]: Start accepts. Automaton has 13601 states and 18896 transitions. Word has length 238 [2018-10-27 06:17:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:17:08,516 INFO L481 AbstractCegarLoop]: Abstraction has 13601 states and 18896 transitions. [2018-10-27 06:17:08,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 06:17:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 13601 states and 18896 transitions. [2018-10-27 06:17:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-27 06:17:08,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:17:08,555 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 06:17:08,555 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:17:08,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:08,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1876808492, now seen corresponding path program 1 times [2018-10-27 06:17:08,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:17:08,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:08,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:08,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:08,558 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:17:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:08,896 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:17:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 90 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:17:09,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:09,697 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:17:09,697 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2018-10-27 06:17:09,698 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [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], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:17:09,704 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:17:09,704 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:11,107 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:17:11,107 INFO L272 AbstractInterpreter]: Visited 171 different actions 511 times. Merged at 8 different actions 22 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:17:11,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:11,125 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:17:11,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:11,125 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 06:17:11,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:11,133 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:17:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:11,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:17:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 06:17:11,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:17:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 99 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 06:17:11,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:17:11,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 06:17:11,639 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:17:11,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:17:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:17:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:17:11,641 INFO L87 Difference]: Start difference. First operand 13601 states and 18896 transitions. Second operand 12 states. [2018-10-27 06:17:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:17,651 INFO L93 Difference]: Finished difference Result 33727 states and 47686 transitions. [2018-10-27 06:17:17,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-27 06:17:17,652 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 258 [2018-10-27 06:17:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:17:17,730 INFO L225 Difference]: With dead ends: 33727 [2018-10-27 06:17:17,730 INFO L226 Difference]: Without dead ends: 20553 [2018-10-27 06:17:17,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 538 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 06:17:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20553 states. [2018-10-27 06:17:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20553 to 20489. [2018-10-27 06:17:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20489 states. [2018-10-27 06:17:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 27210 transitions. [2018-10-27 06:17:18,642 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 27210 transitions. Word has length 258 [2018-10-27 06:17:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:17:18,642 INFO L481 AbstractCegarLoop]: Abstraction has 20489 states and 27210 transitions. [2018-10-27 06:17:18,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:17:18,643 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 27210 transitions. [2018-10-27 06:17:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-27 06:17:18,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:17:18,682 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, 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] [2018-10-27 06:17:18,682 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:17:18,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:18,683 INFO L82 PathProgramCache]: Analyzing trace with hash 418637904, now seen corresponding path program 1 times [2018-10-27 06:17:18,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:17:18,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:18,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:18,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:18,685 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:17:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:19,342 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 06:17:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:17:19,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:19,589 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:17:19,590 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 273 with the following transitions: [2018-10-27 06:17:19,590 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [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], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:17:19,595 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:17:19,595 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:20,944 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:17:20,944 INFO L272 AbstractInterpreter]: Visited 171 different actions 512 times. Merged at 8 different actions 23 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:17:20,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:20,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:17:20,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:20,973 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 06:17:20,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:20,989 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:17:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:21,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:17:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-10-27 06:17:21,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:17:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-10-27 06:17:21,590 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:17:21,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 06:17:21,591 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:17:21,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:17:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:17:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:17:21,592 INFO L87 Difference]: Start difference. First operand 20489 states and 27210 transitions. Second operand 3 states. [2018-10-27 06:17:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:23,568 INFO L93 Difference]: Finished difference Result 59429 states and 80873 transitions. [2018-10-27 06:17:23,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:17:23,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 272 [2018-10-27 06:17:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:17:23,706 INFO L225 Difference]: With dead ends: 59429 [2018-10-27 06:17:23,706 INFO L226 Difference]: Without dead ends: 39367 [2018-10-27 06:17:23,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 542 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:17:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39367 states. [2018-10-27 06:17:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39367 to 39301. [2018-10-27 06:17:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39301 states. [2018-10-27 06:17:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39301 states to 39301 states and 51321 transitions. [2018-10-27 06:17:24,734 INFO L78 Accepts]: Start accepts. Automaton has 39301 states and 51321 transitions. Word has length 272 [2018-10-27 06:17:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:17:24,735 INFO L481 AbstractCegarLoop]: Abstraction has 39301 states and 51321 transitions. [2018-10-27 06:17:24,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:17:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 39301 states and 51321 transitions. [2018-10-27 06:17:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-27 06:17:24,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:17:24,819 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, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:17:24,819 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:17:24,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:24,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1065731421, now seen corresponding path program 1 times [2018-10-27 06:17:24,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:17:24,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:24,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:24,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:24,821 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:17:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:25,456 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 06:17:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 187 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-10-27 06:17:25,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:25,721 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:17:25,721 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-10-27 06:17:25,722 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], [115], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [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], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:17:25,727 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:17:25,727 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:26,948 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:17:26,948 INFO L272 AbstractInterpreter]: Visited 172 different actions 515 times. Merged at 8 different actions 23 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 88 variables. [2018-10-27 06:17:26,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:26,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:17:26,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:26,957 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 06:17:26,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:26,969 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:17:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:27,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:17:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-27 06:17:27,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:17:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-27 06:17:27,519 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:17:27,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 06:17:27,519 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:17:27,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:17:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:17:27,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:17:27,520 INFO L87 Difference]: Start difference. First operand 39301 states and 51321 transitions. Second operand 3 states. [2018-10-27 06:17:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:29,291 INFO L93 Difference]: Finished difference Result 82850 states and 111796 transitions. [2018-10-27 06:17:29,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:17:29,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 305 [2018-10-27 06:17:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:17:29,461 INFO L225 Difference]: With dead ends: 82850 [2018-10-27 06:17:29,461 INFO L226 Difference]: Without dead ends: 51498 [2018-10-27 06:17:29,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:17:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51498 states. [2018-10-27 06:17:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51498 to 51340. [2018-10-27 06:17:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51340 states. [2018-10-27 06:17:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51340 states to 51340 states and 68459 transitions. [2018-10-27 06:17:30,674 INFO L78 Accepts]: Start accepts. Automaton has 51340 states and 68459 transitions. Word has length 305 [2018-10-27 06:17:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:17:30,675 INFO L481 AbstractCegarLoop]: Abstraction has 51340 states and 68459 transitions. [2018-10-27 06:17:30,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:17:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51340 states and 68459 transitions. [2018-10-27 06:17:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-27 06:17:30,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:17:30,746 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 06:17:30,746 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:17:30,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1197304531, now seen corresponding path program 1 times [2018-10-27 06:17:30,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:17:30,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:30,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:30,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:30,748 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:17:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:31,382 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 06:17:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 176 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 06:17:31,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:31,644 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:17:31,644 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 326 with the following transitions: [2018-10-27 06:17:31,644 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [334], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:17:31,649 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:17:31,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:32,989 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:17:32,989 INFO L272 AbstractInterpreter]: Visited 171 different actions 514 times. Merged at 8 different actions 25 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 06:17:32,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:32,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:17:32,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:32,992 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 06:17:32,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:32,999 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:17:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:33,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:17:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 06:17:33,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:17:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 06:17:33,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:17:33,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 06:17:33,581 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:17:33,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 06:17:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:17:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-27 06:17:33,582 INFO L87 Difference]: Start difference. First operand 51340 states and 68459 transitions. Second operand 9 states. [2018-10-27 06:17:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:43,667 INFO L93 Difference]: Finished difference Result 212005 states and 285980 transitions. [2018-10-27 06:17:43,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-27 06:17:43,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 325 [2018-10-27 06:17:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:17:44,647 INFO L225 Difference]: With dead ends: 212005 [2018-10-27 06:17:44,647 INFO L226 Difference]: Without dead ends: 161092 [2018-10-27 06:17:44,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2018-10-27 06:17:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161092 states. [2018-10-27 06:17:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161092 to 160889. [2018-10-27 06:17:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160889 states. [2018-10-27 06:17:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160889 states to 160889 states and 199656 transitions. [2018-10-27 06:17:48,078 INFO L78 Accepts]: Start accepts. Automaton has 160889 states and 199656 transitions. Word has length 325 [2018-10-27 06:17:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:17:48,079 INFO L481 AbstractCegarLoop]: Abstraction has 160889 states and 199656 transitions. [2018-10-27 06:17:48,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 06:17:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 160889 states and 199656 transitions. [2018-10-27 06:17:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-10-27 06:17:48,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:17:48,299 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:17:48,299 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:17:48,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:48,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1972659166, now seen corresponding path program 1 times [2018-10-27 06:17:48,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:17:48,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:48,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:48,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:48,301 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:17:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 240 proven. 66 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-27 06:17:48,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:48,935 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:17:48,936 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 375 with the following transitions: [2018-10-27 06:17:48,936 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], [123], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [334], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:17:48,948 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:17:48,948 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:51,032 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:17:51,033 INFO L272 AbstractInterpreter]: Visited 172 different actions 696 times. Merged at 9 different actions 44 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:17:51,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:51,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:17:51,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:51,042 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 06:17:51,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:51,050 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:17:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:51,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:17:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 204 proven. 128 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-10-27 06:17:51,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:17:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 328 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-10-27 06:17:51,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:17:51,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-10-27 06:17:51,813 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:17:51,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 06:17:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 06:17:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:17:51,814 INFO L87 Difference]: Start difference. First operand 160889 states and 199656 transitions. Second operand 8 states. [2018-10-27 06:17:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:59,819 INFO L93 Difference]: Finished difference Result 317406 states and 410576 transitions. [2018-10-27 06:17:59,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-27 06:17:59,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 374 [2018-10-27 06:17:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:18:00,377 INFO L225 Difference]: With dead ends: 317406 [2018-10-27 06:18:00,378 INFO L226 Difference]: Without dead ends: 157162 [2018-10-27 06:18:00,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 763 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2018-10-27 06:18:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157162 states. [2018-10-27 06:18:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157162 to 152706. [2018-10-27 06:18:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152706 states. [2018-10-27 06:18:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152706 states to 152706 states and 176165 transitions. [2018-10-27 06:18:05,159 INFO L78 Accepts]: Start accepts. Automaton has 152706 states and 176165 transitions. Word has length 374 [2018-10-27 06:18:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:18:05,160 INFO L481 AbstractCegarLoop]: Abstraction has 152706 states and 176165 transitions. [2018-10-27 06:18:05,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 06:18:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 152706 states and 176165 transitions. [2018-10-27 06:18:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-10-27 06:18:05,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:18:05,430 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:18:05,430 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:18:05,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:05,431 INFO L82 PathProgramCache]: Analyzing trace with hash 129061017, now seen corresponding path program 1 times [2018-10-27 06:18:05,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:18:05,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:05,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:05,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:05,432 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:18:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 285 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:18:06,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:06,192 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:18:06,193 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 437 with the following transitions: [2018-10-27 06:18:06,193 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [543], [548], [550], [551], [555], [559], [562], [565], [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], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:18:06,197 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:18:06,197 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:18:07,402 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:18:07,402 INFO L272 AbstractInterpreter]: Visited 175 different actions 691 times. Merged at 8 different actions 33 times. Widened at 1 different actions 1 times. Found 6 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:18:07,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:07,412 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:18:07,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:07,412 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 06:18:11,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:11,815 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:18:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:12,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:18:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 397 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:18:12,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:18:12,630 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-10-27 06:18:12,701 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-10-27 06:18:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 397 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:18:13,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:18:13,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 06:18:13,572 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:18:13,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:18:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:18:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:18:13,574 INFO L87 Difference]: Start difference. First operand 152706 states and 176165 transitions. Second operand 12 states. [2018-10-27 06:18:20,553 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-27 06:18:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:18:28,783 INFO L93 Difference]: Finished difference Result 309097 states and 370562 transitions. [2018-10-27 06:18:28,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-27 06:18:28,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2018-10-27 06:18:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:18:29,299 INFO L225 Difference]: With dead ends: 309097 [2018-10-27 06:18:29,299 INFO L226 Difference]: Without dead ends: 171912 [2018-10-27 06:18:29,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 933 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1183, Invalid=7007, Unknown=0, NotChecked=0, Total=8190 [2018-10-27 06:18:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171912 states. [2018-10-27 06:18:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171912 to 165000. [2018-10-27 06:18:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165000 states. [2018-10-27 06:18:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165000 states to 165000 states and 189566 transitions. [2018-10-27 06:18:33,453 INFO L78 Accepts]: Start accepts. Automaton has 165000 states and 189566 transitions. Word has length 436 [2018-10-27 06:18:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:18:33,454 INFO L481 AbstractCegarLoop]: Abstraction has 165000 states and 189566 transitions. [2018-10-27 06:18:33,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:18:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 165000 states and 189566 transitions. [2018-10-27 06:18:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2018-10-27 06:18:33,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:18:33,631 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:18:33,631 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:18:33,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:33,631 INFO L82 PathProgramCache]: Analyzing trace with hash 451715129, now seen corresponding path program 1 times [2018-10-27 06:18:33,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:18:33,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:33,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:33,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:33,633 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:18:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:34,453 WARN L179 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 8 [2018-10-27 06:18:35,525 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-10-27 06:18:35,678 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2018-10-27 06:18:35,974 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2018-10-27 06:18:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 288 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:18:38,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:38,114 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:18:38,115 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 454 with the following transitions: [2018-10-27 06:18:38,115 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [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], [562], [565], [569], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [661], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [781], [783], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:18:38,120 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:18:38,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:18:39,669 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:18:39,669 INFO L272 AbstractInterpreter]: Visited 173 different actions 685 times. Merged at 8 different actions 33 times. Widened at 1 different actions 1 times. Found 6 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:18:39,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:39,681 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:18:39,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:39,681 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:18:39,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:39,690 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:18:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:39,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:18:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 419 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:18:40,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:18:41,248 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2018-10-27 06:18:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 419 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:18:41,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:18:41,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 23 [2018-10-27 06:18:41,878 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:18:41,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 06:18:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 06:18:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2018-10-27 06:18:41,880 INFO L87 Difference]: Start difference. First operand 165000 states and 189566 transitions. Second operand 21 states. [2018-10-27 06:18:42,255 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 41 [2018-10-27 06:18:42,497 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 40 [2018-10-27 06:18:43,125 WARN L179 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 86 [2018-10-27 06:18:43,895 WARN L179 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 Received shutdown request... [2018-10-27 06:18:44,462 WARN L187 SmtUtils]: Removed 9 from assertion stack [2018-10-27 06:18:44,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 06:18:44,462 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 06:18:44,467 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 06:18:44,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 06:18:44 BoogieIcfgContainer [2018-10-27 06:18:44,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 06:18:44,469 INFO L168 Benchmark]: Toolchain (without parser) took 211513.73 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -710.1 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-27 06:18:44,470 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 06:18:44,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1113.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:44,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 324.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -854.7 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:44,472 INFO L168 Benchmark]: Boogie Preprocessor took 153.70 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: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:44,473 INFO L168 Benchmark]: RCFGBuilder took 5839.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 255.7 MB). Peak memory consumption was 255.7 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:44,473 INFO L168 Benchmark]: TraceAbstraction took 204077.43 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 1.9 GB in the beginning and 2.1 GB in the end (delta: -210.0 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-27 06:18:44,479 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1113.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 324.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -854.7 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.70 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: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5839.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 255.7 MB). Peak memory consumption was 255.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204077.43 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 1.9 GB in the beginning and 2.1 GB in the end (delta: -210.0 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1509]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1509). Cancelled while BasicCegarLoop was constructing difference of abstraction (165000states) and FLOYD_HOARE automaton (currently 13 states, 21 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 98. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 203.9s OverallTime, 14 OverallIterations, 5 TraceHistogramMax, 142.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3209 SDtfs, 25586 SDslu, 5540 SDs, 0 SdLazy, 36092 SolverSat, 7247 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 75.2s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 6406 GetRequests, 6050 SyntacticMatches, 20 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4727 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165000occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 14.1s AbstIntTime, 11 AbstIntIterations, 3 AbstIntStrong, 0.9990244192164455 AbsIntWeakeningRatio, 0.2841269841269841 AbsIntAvgWeakeningVarsNumRemoved, 56.63968253968254 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 15.5s AutomataMinimizationTime, 13 MinimizatonAttempts, 12368 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 16.1s InterpolantComputationTime, 6473 NumberOfCodeBlocks, 6473 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 9104 ConstructedInterpolants, 0 QuantifiedInterpolants, 18268292 SizeOfPredicates, 31 NumberOfNonLiveVariables, 10891 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 30 InterpolantComputations, 7 PerfectInterpolantSequences, 6083/6795 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown