java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 07:18:16,197 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 07:18:16,199 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 07:18:16,212 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 07:18:16,213 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 07:18:16,214 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 07:18:16,215 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 07:18:16,218 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 07:18:16,219 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 07:18:16,220 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 07:18:16,221 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 07:18:16,222 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 07:18:16,223 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 07:18:16,224 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 07:18:16,225 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 07:18:16,226 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 07:18:16,227 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 07:18:16,229 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 07:18:16,231 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 07:18:16,235 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 07:18:16,236 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 07:18:16,242 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 07:18:16,245 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 07:18:16,245 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 07:18:16,246 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 07:18:16,246 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 07:18:16,247 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 07:18:16,248 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 07:18:16,249 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 07:18:16,250 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 07:18:16,251 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 07:18:16,251 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 07:18:16,255 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 07:18:16,255 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 07:18:16,256 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 07:18:16,257 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 07:18:16,258 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 07:18:16,289 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 07:18:16,289 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 07:18:16,290 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 07:18:16,290 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 07:18:16,290 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 07:18:16,292 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 07:18:16,292 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 07:18:16,292 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 07:18:16,292 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 07:18:16,293 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 07:18:16,293 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 07:18:16,293 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 07:18:16,293 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 07:18:16,293 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 07:18:16,294 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 07:18:16,295 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 07:18:16,295 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 07:18:16,295 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 07:18:16,295 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 07:18:16,295 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 07:18:16,297 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 07:18:16,298 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 07:18:16,298 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 07:18:16,298 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 07:18:16,298 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 07:18:16,299 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 07:18:16,299 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:18:16,299 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 07:18:16,299 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 07:18:16,299 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 07:18:16,300 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 07:18:16,300 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 07:18:16,300 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 07:18:16,300 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 07:18:16,300 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 07:18:16,300 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 07:18:16,375 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 07:18:16,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 07:18:16,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 07:18:16,398 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 07:18:16,399 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 07:18:16,400 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label54_true-unreach-call.c [2018-11-07 07:18:16,468 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd1332bc/58f7b28e1b964f35974ecd879d0e9c03/FLAGabcc1e5a1 [2018-11-07 07:18:17,135 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 07:18:17,136 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label54_true-unreach-call.c [2018-11-07 07:18:17,159 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd1332bc/58f7b28e1b964f35974ecd879d0e9c03/FLAGabcc1e5a1 [2018-11-07 07:18:17,177 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fd1332bc/58f7b28e1b964f35974ecd879d0e9c03 [2018-11-07 07:18:17,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 07:18:17,190 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 07:18:17,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 07:18:17,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 07:18:17,196 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 07:18:17,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:18:17" (1/1) ... [2018-11-07 07:18:17,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41fd93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:17, skipping insertion in model container [2018-11-07 07:18:17,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:18:17" (1/1) ... [2018-11-07 07:18:17,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 07:18:17,329 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 07:18:18,086 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:18:18,092 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 07:18:18,341 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:18:18,366 INFO L193 MainTranslator]: Completed translation [2018-11-07 07:18:18,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18 WrapperNode [2018-11-07 07:18:18,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 07:18:18,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 07:18:18,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 07:18:18,369 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 07:18:18,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 07:18:18,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 07:18:18,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 07:18:18,591 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 07:18:18,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... [2018-11-07 07:18:18,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 07:18:18,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 07:18:18,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 07:18:18,770 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 07:18:18,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:18:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 07:18:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 07:18:18,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 07:18:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 07:18:18,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 07:18:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 07:18:18,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 07:18:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 07:18:18,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 07:18:23,719 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 07:18:23,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:18:23 BoogieIcfgContainer [2018-11-07 07:18:23,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 07:18:23,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 07:18:23,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 07:18:23,727 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 07:18:23,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:18:17" (1/3) ... [2018-11-07 07:18:23,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d91991b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:18:23, skipping insertion in model container [2018-11-07 07:18:23,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:18:18" (2/3) ... [2018-11-07 07:18:23,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d91991b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:18:23, skipping insertion in model container [2018-11-07 07:18:23,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:18:23" (3/3) ... [2018-11-07 07:18:23,735 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label54_true-unreach-call.c [2018-11-07 07:18:23,746 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 07:18:23,759 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 07:18:23,775 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 07:18:23,816 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 07:18:23,817 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 07:18:23,817 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 07:18:23,817 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 07:18:23,817 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 07:18:23,817 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 07:18:23,818 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 07:18:23,818 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 07:18:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 07:18:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-07 07:18:23,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:23,871 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:23,873 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:23,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash -332126540, now seen corresponding path program 1 times [2018-11-07 07:18:23,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:23,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:23,932 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:24,759 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:18:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:24,967 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:18:24,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:18:24,968 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:24,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:18:24,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:18:24,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:18:24,991 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 07:18:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:26,979 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-11-07 07:18:26,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:18:26,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2018-11-07 07:18:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:27,004 INFO L225 Difference]: With dead ends: 848 [2018-11-07 07:18:27,004 INFO L226 Difference]: Without dead ends: 534 [2018-11-07 07:18:27,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:18:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-11-07 07:18:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-11-07 07:18:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-11-07 07:18:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-11-07 07:18:27,105 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 173 [2018-11-07 07:18:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:27,108 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-11-07 07:18:27,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:18:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-11-07 07:18:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-07 07:18:27,126 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:27,126 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:27,127 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:27,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1662155856, now seen corresponding path program 1 times [2018-11-07 07:18:27,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:27,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:27,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:27,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:27,131 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:27,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:18:27,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:18:27,651 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:27,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:18:27,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:18:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:18:27,656 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-11-07 07:18:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:29,627 INFO L93 Difference]: Finished difference Result 1484 states and 2494 transitions. [2018-11-07 07:18:29,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:18:29,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2018-11-07 07:18:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:29,636 INFO L225 Difference]: With dead ends: 1484 [2018-11-07 07:18:29,636 INFO L226 Difference]: Without dead ends: 958 [2018-11-07 07:18:29,641 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:18:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-11-07 07:18:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 952. [2018-11-07 07:18:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-11-07 07:18:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1499 transitions. [2018-11-07 07:18:29,693 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1499 transitions. Word has length 186 [2018-11-07 07:18:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:29,694 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 1499 transitions. [2018-11-07 07:18:29,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:18:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1499 transitions. [2018-11-07 07:18:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-07 07:18:29,701 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:29,701 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:29,701 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:29,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:29,702 INFO L82 PathProgramCache]: Analyzing trace with hash -173836503, now seen corresponding path program 1 times [2018-11-07 07:18:29,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:29,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:29,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:29,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:29,705 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:29,967 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:18:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:30,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:18:30,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:18:30,009 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 198 with the following transitions: [2018-11-07 07:18:30,011 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:18:30,083 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:18:30,084 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:18:31,259 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:18:31,260 INFO L272 AbstractInterpreter]: Visited 174 different actions 174 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 07:18:31,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:31,305 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:18:32,303 INFO L227 lantSequenceWeakener]: Weakened 186 states. On average, predicates are now at 72.14% of their original sizes. [2018-11-07 07:18:32,303 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:18:33,045 INFO L415 sIntCurrentIteration]: We unified 196 AI predicates to 196 [2018-11-07 07:18:33,045 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:18:33,046 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:18:33,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [5] total 18 [2018-11-07 07:18:33,048 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:33,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 07:18:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 07:18:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-07 07:18:33,050 INFO L87 Difference]: Start difference. First operand 952 states and 1499 transitions. Second operand 15 states. [2018-11-07 07:18:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:18:45,394 INFO L93 Difference]: Finished difference Result 2108 states and 3325 transitions. [2018-11-07 07:18:45,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 07:18:45,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2018-11-07 07:18:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:18:45,403 INFO L225 Difference]: With dead ends: 2108 [2018-11-07 07:18:45,403 INFO L226 Difference]: Without dead ends: 1162 [2018-11-07 07:18:45,407 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 197 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:18:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2018-11-07 07:18:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2018-11-07 07:18:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2018-11-07 07:18:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1715 transitions. [2018-11-07 07:18:45,441 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1715 transitions. Word has length 197 [2018-11-07 07:18:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:18:45,441 INFO L480 AbstractCegarLoop]: Abstraction has 1160 states and 1715 transitions. [2018-11-07 07:18:45,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 07:18:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1715 transitions. [2018-11-07 07:18:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-07 07:18:45,447 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:18:45,447 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:18:45,447 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:18:45,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:45,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1967318092, now seen corresponding path program 1 times [2018-11-07 07:18:45,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:18:45,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:45,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:18:45,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:18:45,449 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:18:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:18:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:18:45,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:18:45,766 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:18:45,766 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2018-11-07 07:18:45,767 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [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], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:18:45,776 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:18:45,777 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:18:47,608 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:18:47,608 INFO L272 AbstractInterpreter]: Visited 179 different actions 532 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:18:47,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:18:47,653 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:18:48,218 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 74.84% of their original sizes. [2018-11-07 07:18:48,218 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:18:48,699 INFO L415 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2018-11-07 07:18:48,700 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:18:48,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:18:48,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [5] total 25 [2018-11-07 07:18:48,701 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:18:48,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 07:18:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 07:18:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-11-07 07:18:48,703 INFO L87 Difference]: Start difference. First operand 1160 states and 1715 transitions. Second operand 22 states. [2018-11-07 07:20:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:06,540 INFO L93 Difference]: Finished difference Result 6620 states and 11142 transitions. [2018-11-07 07:20:06,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-07 07:20:06,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 206 [2018-11-07 07:20:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:06,571 INFO L225 Difference]: With dead ends: 6620 [2018-11-07 07:20:06,572 INFO L226 Difference]: Without dead ends: 5674 [2018-11-07 07:20:06,584 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 231 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2018-11-07 07:20:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2018-11-07 07:20:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5647. [2018-11-07 07:20:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5647 states. [2018-11-07 07:20:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 7694 transitions. [2018-11-07 07:20:06,758 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 7694 transitions. Word has length 206 [2018-11-07 07:20:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:06,759 INFO L480 AbstractCegarLoop]: Abstraction has 5647 states and 7694 transitions. [2018-11-07 07:20:06,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 07:20:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 7694 transitions. [2018-11-07 07:20:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-11-07 07:20:06,774 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:06,775 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:20:06,775 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:06,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash 913604782, now seen corresponding path program 1 times [2018-11-07 07:20:06,776 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:06,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:06,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:06,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:06,777 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:07,083 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:20:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 07:20:07,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:07,233 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:07,233 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 214 with the following transitions: [2018-11-07 07:20:07,234 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], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:07,242 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:07,242 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:08,051 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:20:08,051 INFO L272 AbstractInterpreter]: Visited 177 different actions 348 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:20:08,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:08,054 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:20:08,540 INFO L227 lantSequenceWeakener]: Weakened 210 states. On average, predicates are now at 72.42% of their original sizes. [2018-11-07 07:20:08,540 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:20:08,944 INFO L415 sIntCurrentIteration]: We unified 212 AI predicates to 212 [2018-11-07 07:20:08,944 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:20:08,945 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:20:08,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 07:20:08,945 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:20:08,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 07:20:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 07:20:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-11-07 07:20:08,946 INFO L87 Difference]: Start difference. First operand 5647 states and 7694 transitions. Second operand 20 states. [2018-11-07 07:20:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:17,567 INFO L93 Difference]: Finished difference Result 7650 states and 10771 transitions. [2018-11-07 07:20:17,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 07:20:17,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 213 [2018-11-07 07:20:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:17,593 INFO L225 Difference]: With dead ends: 7650 [2018-11-07 07:20:17,594 INFO L226 Difference]: Without dead ends: 5861 [2018-11-07 07:20:17,602 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 221 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2018-11-07 07:20:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2018-11-07 07:20:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 5858. [2018-11-07 07:20:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5858 states. [2018-11-07 07:20:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 7923 transitions. [2018-11-07 07:20:17,743 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 7923 transitions. Word has length 213 [2018-11-07 07:20:17,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:17,744 INFO L480 AbstractCegarLoop]: Abstraction has 5858 states and 7923 transitions. [2018-11-07 07:20:17,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 07:20:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 7923 transitions. [2018-11-07 07:20:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-07 07:20:17,759 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:17,759 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:20:17,760 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:17,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 711691309, now seen corresponding path program 1 times [2018-11-07 07:20:17,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:17,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:17,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:17,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:17,762 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:18,023 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:20:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 63 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:20:18,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:18,344 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:18,344 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-11-07 07:20:18,345 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [16], [17], [21], [24], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:18,352 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:18,352 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:19,226 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:19,227 INFO L272 AbstractInterpreter]: Visited 182 different actions 538 times. Merged at 8 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:20:19,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:19,234 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:19,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:19,234 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:20:19,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:19,243 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:19,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 54 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-07 07:20:19,946 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 48 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-11-07 07:20:20,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:20:20,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 07:20:20,431 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:20:20,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 07:20:20,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 07:20:20,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:20:20,433 INFO L87 Difference]: Start difference. First operand 5858 states and 7923 transitions. Second operand 9 states. [2018-11-07 07:20:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:24,792 INFO L93 Difference]: Finished difference Result 18388 states and 27912 transitions. [2018-11-07 07:20:24,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 07:20:24,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 219 [2018-11-07 07:20:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:24,871 INFO L225 Difference]: With dead ends: 18388 [2018-11-07 07:20:24,871 INFO L226 Difference]: Without dead ends: 12955 [2018-11-07 07:20:24,900 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 447 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2018-11-07 07:20:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12955 states. [2018-11-07 07:20:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12955 to 12667. [2018-11-07 07:20:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12667 states. [2018-11-07 07:20:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12667 states to 12667 states and 17135 transitions. [2018-11-07 07:20:25,326 INFO L78 Accepts]: Start accepts. Automaton has 12667 states and 17135 transitions. Word has length 219 [2018-11-07 07:20:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:25,326 INFO L480 AbstractCegarLoop]: Abstraction has 12667 states and 17135 transitions. [2018-11-07 07:20:25,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 07:20:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12667 states and 17135 transitions. [2018-11-07 07:20:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-11-07 07:20:25,356 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:25,357 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:20:25,357 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:25,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash 67883900, now seen corresponding path program 1 times [2018-11-07 07:20:25,358 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:25,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:25,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:25,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:25,359 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 07:20:26,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:26,233 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:26,233 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 247 with the following transitions: [2018-11-07 07:20:26,233 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:26,245 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:26,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:28,041 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:28,041 INFO L272 AbstractInterpreter]: Visited 179 different actions 534 times. Merged at 7 different actions 21 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:20:28,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:28,074 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:28,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:28,074 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:20:28,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:28,090 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:28,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-07 07:20:28,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-07 07:20:29,108 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:20:29,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 07:20:29,108 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:20:29,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:20:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:20:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:20:29,110 INFO L87 Difference]: Start difference. First operand 12667 states and 17135 transitions. Second operand 3 states. [2018-11-07 07:20:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:33,659 INFO L93 Difference]: Finished difference Result 24913 states and 33875 transitions. [2018-11-07 07:20:33,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:20:33,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2018-11-07 07:20:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:33,703 INFO L225 Difference]: With dead ends: 24913 [2018-11-07 07:20:33,703 INFO L226 Difference]: Without dead ends: 12671 [2018-11-07 07:20:33,747 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 490 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:20:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12671 states. [2018-11-07 07:20:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12671 to 12667. [2018-11-07 07:20:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12667 states. [2018-11-07 07:20:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12667 states to 12667 states and 16345 transitions. [2018-11-07 07:20:33,995 INFO L78 Accepts]: Start accepts. Automaton has 12667 states and 16345 transitions. Word has length 246 [2018-11-07 07:20:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:33,996 INFO L480 AbstractCegarLoop]: Abstraction has 12667 states and 16345 transitions. [2018-11-07 07:20:33,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:20:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 12667 states and 16345 transitions. [2018-11-07 07:20:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-07 07:20:34,026 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:34,027 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, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:20:34,027 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:34,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1385700341, now seen corresponding path program 1 times [2018-11-07 07:20:34,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:34,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:34,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:34,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:34,029 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 84 proven. 59 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-07 07:20:34,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:34,305 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:34,305 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 261 with the following transitions: [2018-11-07 07:20:34,306 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:34,310 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:34,311 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:35,502 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:20:35,502 INFO L272 AbstractInterpreter]: Visited 180 different actions 538 times. Merged at 8 different actions 22 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:20:35,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:35,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:20:35,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:35,508 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:20:35,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:35,517 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:20:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:35,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:20:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 07:20:36,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:20:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 93 proven. 20 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-11-07 07:20:36,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:20:36,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-11-07 07:20:36,590 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:20:36,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:20:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:20:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-07 07:20:36,592 INFO L87 Difference]: Start difference. First operand 12667 states and 16345 transitions. Second operand 12 states. [2018-11-07 07:20:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:20:42,754 INFO L93 Difference]: Finished difference Result 39693 states and 52315 transitions. [2018-11-07 07:20:42,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 07:20:42,755 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 260 [2018-11-07 07:20:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:20:42,866 INFO L225 Difference]: With dead ends: 39693 [2018-11-07 07:20:42,867 INFO L226 Difference]: Without dead ends: 27451 [2018-11-07 07:20:42,924 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 542 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2018-11-07 07:20:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2018-11-07 07:20:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 27435. [2018-11-07 07:20:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27435 states. [2018-11-07 07:20:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27435 states to 27435 states and 34565 transitions. [2018-11-07 07:20:43,523 INFO L78 Accepts]: Start accepts. Automaton has 27435 states and 34565 transitions. Word has length 260 [2018-11-07 07:20:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:20:43,524 INFO L480 AbstractCegarLoop]: Abstraction has 27435 states and 34565 transitions. [2018-11-07 07:20:43,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:20:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 27435 states and 34565 transitions. [2018-11-07 07:20:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-11-07 07:20:43,592 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:20:43,592 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 07:20:43,592 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:20:43,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2128920829, now seen corresponding path program 1 times [2018-11-07 07:20:43,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:20:43,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:43,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:20:43,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:20:43,594 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:20:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:20:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:20:44,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:20:44,190 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:20:44,191 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 316 with the following transitions: [2018-11-07 07:20:44,191 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], [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], [460], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:20:44,197 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:20:44,197 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:20:44,908 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:20:44,908 INFO L272 AbstractInterpreter]: Visited 177 different actions 348 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:20:44,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:20:44,913 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:20:45,740 INFO L227 lantSequenceWeakener]: Weakened 312 states. On average, predicates are now at 72.19% of their original sizes. [2018-11-07 07:20:45,741 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:20:45,993 INFO L415 sIntCurrentIteration]: We unified 314 AI predicates to 314 [2018-11-07 07:20:45,993 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:20:45,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:20:45,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-11-07 07:20:45,994 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:20:45,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 07:20:45,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 07:20:45,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 07:20:45,996 INFO L87 Difference]: Start difference. First operand 27435 states and 34565 transitions. Second operand 18 states. [2018-11-07 07:21:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:21:12,167 INFO L93 Difference]: Finished difference Result 44880 states and 57948 transitions. [2018-11-07 07:21:12,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 07:21:12,167 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 315 [2018-11-07 07:21:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:21:12,265 INFO L225 Difference]: With dead ends: 44880 [2018-11-07 07:21:12,266 INFO L226 Difference]: Without dead ends: 28702 [2018-11-07 07:21:12,308 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 323 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-11-07 07:21:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2018-11-07 07:21:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28689. [2018-11-07 07:21:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28689 states. [2018-11-07 07:21:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28689 states to 28689 states and 35978 transitions. [2018-11-07 07:21:12,841 INFO L78 Accepts]: Start accepts. Automaton has 28689 states and 35978 transitions. Word has length 315 [2018-11-07 07:21:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:21:12,843 INFO L480 AbstractCegarLoop]: Abstraction has 28689 states and 35978 transitions. [2018-11-07 07:21:12,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 07:21:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 28689 states and 35978 transitions. [2018-11-07 07:21:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-11-07 07:21:12,897 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:21:12,897 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:21:12,897 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:21:12,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:12,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2059269957, now seen corresponding path program 1 times [2018-11-07 07:21:12,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:21:12,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:12,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:12,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:12,899 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:21:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 149 proven. 49 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:21:13,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:13,659 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:21:13,660 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 326 with the following transitions: [2018-11-07 07:21:13,660 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [95], [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], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:21:13,665 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:21:13,665 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:21:15,168 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:21:15,168 INFO L272 AbstractInterpreter]: Visited 182 different actions 724 times. Merged at 9 different actions 35 times. Never widened. Found 9 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:21:15,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:15,175 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:21:15,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:15,175 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:21:15,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:15,183 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:21:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:15,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:21:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-07 07:21:16,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:21:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 158 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-07 07:21:16,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:21:16,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-11-07 07:21:16,749 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:21:16,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:21:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:21:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-07 07:21:16,750 INFO L87 Difference]: Start difference. First operand 28689 states and 35978 transitions. Second operand 12 states. [2018-11-07 07:21:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:21:25,886 INFO L93 Difference]: Finished difference Result 88415 states and 124105 transitions. [2018-11-07 07:21:25,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-07 07:21:25,887 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 325 [2018-11-07 07:21:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:21:26,182 INFO L225 Difference]: With dead ends: 88415 [2018-11-07 07:21:26,182 INFO L226 Difference]: Without dead ends: 68436 [2018-11-07 07:21:26,800 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 681 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=497, Invalid=1855, Unknown=0, NotChecked=0, Total=2352 [2018-11-07 07:21:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68436 states. [2018-11-07 07:21:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68436 to 68270. [2018-11-07 07:21:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68270 states. [2018-11-07 07:21:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68270 states to 68270 states and 92573 transitions. [2018-11-07 07:21:28,291 INFO L78 Accepts]: Start accepts. Automaton has 68270 states and 92573 transitions. Word has length 325 [2018-11-07 07:21:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:21:28,291 INFO L480 AbstractCegarLoop]: Abstraction has 68270 states and 92573 transitions. [2018-11-07 07:21:28,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:21:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 68270 states and 92573 transitions. [2018-11-07 07:21:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-07 07:21:28,375 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:21:28,375 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 07:21:28,376 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:21:28,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash 317574997, now seen corresponding path program 1 times [2018-11-07 07:21:28,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:21:28,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:28,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:28,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:28,377 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:21:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 163 proven. 14 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-07 07:21:28,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:28,976 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:21:28,977 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-07 07:21:28,977 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [65], [76], [80], [84], [88], [92], [95], [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], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:21:28,982 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:21:28,982 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:21:30,127 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:21:30,127 INFO L272 AbstractInterpreter]: Visited 182 different actions 721 times. Merged at 9 different actions 33 times. Never widened. Found 9 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:21:30,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:30,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:21:30,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:30,138 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:21:30,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:30,147 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:21:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:30,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:21:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-07 07:21:30,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:21:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-07 07:21:30,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:21:30,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-07 07:21:30,643 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:21:30,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 07:21:30,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 07:21:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:21:30,645 INFO L87 Difference]: Start difference. First operand 68270 states and 92573 transitions. Second operand 8 states. [2018-11-07 07:21:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:21:39,881 INFO L93 Difference]: Finished difference Result 199041 states and 296641 transitions. [2018-11-07 07:21:39,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-07 07:21:39,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 333 [2018-11-07 07:21:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:21:40,975 INFO L225 Difference]: With dead ends: 199041 [2018-11-07 07:21:40,975 INFO L226 Difference]: Without dead ends: 119498 [2018-11-07 07:21:41,327 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2018-11-07 07:21:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119498 states. [2018-11-07 07:21:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119498 to 115478. [2018-11-07 07:21:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115478 states. [2018-11-07 07:21:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115478 states to 115478 states and 149703 transitions. [2018-11-07 07:21:48,044 INFO L78 Accepts]: Start accepts. Automaton has 115478 states and 149703 transitions. Word has length 333 [2018-11-07 07:21:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:21:48,044 INFO L480 AbstractCegarLoop]: Abstraction has 115478 states and 149703 transitions. [2018-11-07 07:21:48,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 07:21:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 115478 states and 149703 transitions. [2018-11-07 07:21:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-11-07 07:21:48,261 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:21:48,261 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 07:21:48,262 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:21:48,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:48,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1596906126, now seen corresponding path program 1 times [2018-11-07 07:21:48,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:21:48,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:48,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:48,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:21:48,264 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:21:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 297 proven. 44 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-07 07:21:49,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:49,032 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:21:49,032 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 429 with the following transitions: [2018-11-07 07:21:49,032 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [79], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [139], [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], [661], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [845], [847], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:21:49,041 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:21:49,041 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:21:50,206 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:21:50,207 INFO L272 AbstractInterpreter]: Visited 181 different actions 727 times. Merged at 10 different actions 38 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 4 different actions. Largest state had 88 variables. [2018-11-07 07:21:50,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:21:50,219 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:21:50,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:21:50,219 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 07:21:50,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:21:50,229 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:21:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:21:50,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-11-07 07:21:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 392 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-11-07 07:21:51,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:21:51,113 WARN L187 SmtUtils]: Removed 1 from assertion stack [2018-11-07 07:21:51,113 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 07:21:51,314 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:21:51,314 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 07:21:51,320 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 07:21:51,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:21:51 BoogieIcfgContainer [2018-11-07 07:21:51,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 07:21:51,321 INFO L168 Benchmark]: Toolchain (without parser) took 214131.61 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 3.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 890.8 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:51,322 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:21:51,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1176.16 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:51,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 221.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 745.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -878.6 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:51,324 INFO L168 Benchmark]: Boogie Preprocessor took 179.37 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:21:51,325 INFO L168 Benchmark]: RCFGBuilder took 4950.30 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 261.3 MB). Peak memory consumption was 261.3 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:51,326 INFO L168 Benchmark]: TraceAbstraction took 207596.62 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 3.8 GB in the end (delta: -1.9 GB). Peak memory consumption was 668.0 MB. Max. memory is 7.1 GB. [2018-11-07 07:21:51,335 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1176.16 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 221.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 745.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -878.6 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 179.37 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4950.30 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 261.3 MB). Peak memory consumption was 261.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207596.62 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 3.8 GB in the end (delta: -1.9 GB). Peak memory consumption was 668.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1533]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1533). Cancelled while BasicCegarLoop was analyzing trace of length 429 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while PartialQuantifierElimination was doing sequential composition of 29 TransFormulas,while SimplifyDDAWithTimeout was simplifying term of DAG size 1. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 207.5s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 165.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3241 SDtfs, 27271 SDslu, 5278 SDs, 0 SdLazy, 29052 SolverSat, 7414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 77.7s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4009 GetRequests, 3720 SyntacticMatches, 14 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115478occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 12.5s AbstIntTime, 10 AbstIntIterations, 4 AbstIntStrong, 0.9990249856397138 AbsIntWeakeningRatio, 0.2750809061488673 AbsIntAvgWeakeningVarsNumRemoved, 56.982740021574976 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 10.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 4547 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 4056 NumberOfCodeBlocks, 4056 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5418 ConstructedInterpolants, 0 QuantifiedInterpolants, 2632020 SizeOfPredicates, 5 NumberOfNonLiveVariables, 6870 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 2568/2788 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown