java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label49_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:06:50,317 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:06:50,319 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:06:50,331 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:06:50,331 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:06:50,333 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:06:50,334 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:06:50,336 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:06:50,337 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:06:50,338 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:06:50,340 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:06:50,340 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:06:50,341 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:06:50,344 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:06:50,345 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:06:50,346 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:06:50,348 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:06:50,358 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:06:50,360 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:06:50,364 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:06:50,368 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:06:50,370 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:06:50,374 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:06:50,374 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:06:50,375 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:06:50,378 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:06:50,379 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:06:50,379 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:06:50,383 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:06:50,384 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:06:50,384 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:06:50,387 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 08:06:50,389 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:06:50,421 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:06:50,421 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:06:50,422 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:06:50,422 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:06:50,425 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:06:50,425 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:06:50,425 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:06:50,426 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:06:50,426 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:06:50,426 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:06:50,426 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:06:50,426 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:06:50,427 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:06:50,427 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:06:50,428 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:06:50,429 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:06:50,429 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:06:50,429 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:06:50,429 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:06:50,429 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:06:50,430 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:06:50,430 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:06:50,430 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:06:50,430 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:06:50,430 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:06:50,432 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:06:50,432 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:06:50,433 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:06:50,433 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:06:50,433 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:06:50,433 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:06:50,433 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:06:50,434 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:06:50,434 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:06:50,434 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:06:50,434 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:06:50,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:06:50,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:06:50,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:06:50,523 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:06:50,524 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:06:50,525 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label49_true-unreach-call_false-termination.c [2018-10-27 08:06:50,598 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cc796e1c6/df7b7a11cf7542ddbf7ee6994c57bf4f/FLAG346443c08 [2018-10-27 08:06:51,180 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:06:51,181 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label49_true-unreach-call_false-termination.c [2018-10-27 08:06:51,201 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cc796e1c6/df7b7a11cf7542ddbf7ee6994c57bf4f/FLAG346443c08 [2018-10-27 08:06:51,222 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cc796e1c6/df7b7a11cf7542ddbf7ee6994c57bf4f [2018-10-27 08:06:51,235 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:06:51,236 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:06:51,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:06:51,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:06:51,246 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:06:51,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:06:51" (1/1) ... [2018-10-27 08:06:51,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a13cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:51, skipping insertion in model container [2018-10-27 08:06:51,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:06:51" (1/1) ... [2018-10-27 08:06:51,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:06:51,345 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:06:51,866 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:06:51,871 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:06:52,032 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:06:52,053 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:06:52,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52 WrapperNode [2018-10-27 08:06:52,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:06:52,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:06:52,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:06:52,055 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:06:52,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:06:52,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:06:52,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:06:52,299 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:06:52,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... [2018-10-27 08:06:52,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:06:52,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:06:52,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:06:52,414 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:06:52,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:06:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:06:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:06:52,485 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:06:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:06:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:06:52,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:06:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:06:52,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:06:55,967 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:06:55,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:06:55 BoogieIcfgContainer [2018-10-27 08:06:55,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:06:55,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:06:55,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:06:55,973 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:06:55,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:06:51" (1/3) ... [2018-10-27 08:06:55,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5178cad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:06:55, skipping insertion in model container [2018-10-27 08:06:55,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:06:52" (2/3) ... [2018-10-27 08:06:55,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5178cad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:06:55, skipping insertion in model container [2018-10-27 08:06:55,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:06:55" (3/3) ... [2018-10-27 08:06:55,977 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label49_true-unreach-call_false-termination.c [2018-10-27 08:06:55,987 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:06:55,996 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:06:56,014 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:06:56,052 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:06:56,052 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:06:56,052 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:06:56,053 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:06:56,053 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:06:56,053 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:06:56,053 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:06:56,053 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:06:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 08:06:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-27 08:06:56,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:06:56,089 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] [2018-10-27 08:06:56,091 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:06:56,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:06:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -825405036, now seen corresponding path program 1 times [2018-10-27 08:06:56,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:06:56,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:06:56,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:06:56,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:06:56,160 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:06:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:06:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:06:56,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:06:56,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:06:56,684 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:06:56,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:06:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:06:56,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:06:56,712 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-10-27 08:06:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:06:59,806 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-10-27 08:06:59,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:06:59,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2018-10-27 08:06:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:06:59,833 INFO L225 Difference]: With dead ends: 894 [2018-10-27 08:06:59,833 INFO L226 Difference]: Without dead ends: 633 [2018-10-27 08:06:59,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:06:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-10-27 08:06:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-10-27 08:06:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-10-27 08:06:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 962 transitions. [2018-10-27 08:06:59,947 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 962 transitions. Word has length 66 [2018-10-27 08:06:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:06:59,948 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 962 transitions. [2018-10-27 08:06:59,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:06:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 962 transitions. [2018-10-27 08:06:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-27 08:06:59,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:06:59,964 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:06:59,964 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:06:59,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:06:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash 965459243, now seen corresponding path program 1 times [2018-10-27 08:06:59,965 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:06:59,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:06:59,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:06:59,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:06:59,969 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:07:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:07:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:07:00,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:07:00,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:07:00,351 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:07:00,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:07:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:07:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:07:00,354 INFO L87 Difference]: Start difference. First operand 633 states and 962 transitions. Second operand 4 states. [2018-10-27 08:07:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:07:03,467 INFO L93 Difference]: Finished difference Result 2358 states and 3743 transitions. [2018-10-27 08:07:03,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:07:03,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2018-10-27 08:07:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:07:03,482 INFO L225 Difference]: With dead ends: 2358 [2018-10-27 08:07:03,482 INFO L226 Difference]: Without dead ends: 1731 [2018-10-27 08:07:03,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:07:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-10-27 08:07:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-10-27 08:07:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-10-27 08:07:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2521 transitions. [2018-10-27 08:07:03,564 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2521 transitions. Word has length 179 [2018-10-27 08:07:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:07:03,565 INFO L481 AbstractCegarLoop]: Abstraction has 1731 states and 2521 transitions. [2018-10-27 08:07:03,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:07:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2521 transitions. [2018-10-27 08:07:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-27 08:07:03,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:07:03,577 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-10-27 08:07:03,578 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:07:03,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:07:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 747473196, now seen corresponding path program 1 times [2018-10-27 08:07:03,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:07:03,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:07:03,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:07:03,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:07:03,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:07:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:07:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 200 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:07:04,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:07:04,183 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:07:04,184 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-10-27 08:07:04,186 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:07:04,257 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:07:04,258 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:07:04,705 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:07:04,706 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 08:07:04,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:07:04,716 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:07:05,219 INFO L227 lantSequenceWeakener]: Weakened 253 states. On average, predicates are now at 78.17% of their original sizes. [2018-10-27 08:07:05,219 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:07:05,334 INFO L415 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2018-10-27 08:07:05,334 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:07:05,335 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:07:05,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-27 08:07:05,336 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:07:05,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:07:05,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:07:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:07:05,337 INFO L87 Difference]: Start difference. First operand 1731 states and 2521 transitions. Second operand 6 states. [2018-10-27 08:07:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:07:32,478 INFO L93 Difference]: Finished difference Result 3641 states and 5276 transitions. [2018-10-27 08:07:32,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:07:32,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 262 [2018-10-27 08:07:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:07:32,490 INFO L225 Difference]: With dead ends: 3641 [2018-10-27 08:07:32,490 INFO L226 Difference]: Without dead ends: 1916 [2018-10-27 08:07:32,495 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 262 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:07:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-10-27 08:07:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2018-10-27 08:07:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-10-27 08:07:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2711 transitions. [2018-10-27 08:07:32,552 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2711 transitions. Word has length 262 [2018-10-27 08:07:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:07:32,553 INFO L481 AbstractCegarLoop]: Abstraction has 1914 states and 2711 transitions. [2018-10-27 08:07:32,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:07:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2711 transitions. [2018-10-27 08:07:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-27 08:07:32,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:07:32,563 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:07:32,563 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:07:32,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:07:32,564 INFO L82 PathProgramCache]: Analyzing trace with hash -178374725, now seen corresponding path program 1 times [2018-10-27 08:07:32,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:07:32,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:07:32,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:07:32,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:07:32,566 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:07:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:07:33,046 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 08:07:33,237 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 08:07:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 264 proven. 161 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 08:07:34,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:07:34,091 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:07:34,092 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-10-27 08:07:34,092 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:07:34,098 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:07:34,099 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:07:34,242 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:07:34,242 INFO L272 AbstractInterpreter]: Visited 121 different actions 235 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:07:34,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:07:34,279 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:07:34,644 INFO L227 lantSequenceWeakener]: Weakened 344 states. On average, predicates are now at 78.01% of their original sizes. [2018-10-27 08:07:34,644 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:07:34,810 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-10-27 08:07:34,811 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:07:34,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:07:34,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-10-27 08:07:34,811 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:07:34,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:07:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:07:34,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:07:34,813 INFO L87 Difference]: Start difference. First operand 1914 states and 2711 transitions. Second operand 10 states. [2018-10-27 08:08:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:08:50,942 INFO L93 Difference]: Finished difference Result 4387 states and 6180 transitions. [2018-10-27 08:08:50,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 08:08:50,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 347 [2018-10-27 08:08:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:08:50,958 INFO L225 Difference]: With dead ends: 4387 [2018-10-27 08:08:50,958 INFO L226 Difference]: Without dead ends: 2662 [2018-10-27 08:08:50,964 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 355 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-10-27 08:08:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2018-10-27 08:08:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2659. [2018-10-27 08:08:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2659 states. [2018-10-27 08:08:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3544 transitions. [2018-10-27 08:08:51,031 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3544 transitions. Word has length 347 [2018-10-27 08:08:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:08:51,032 INFO L481 AbstractCegarLoop]: Abstraction has 2659 states and 3544 transitions. [2018-10-27 08:08:51,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 08:08:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3544 transitions. [2018-10-27 08:08:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-10-27 08:08:51,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:08:51,044 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:08:51,044 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:08:51,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:08:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1292754080, now seen corresponding path program 1 times [2018-10-27 08:08:51,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:08:51,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:08:51,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:08:51,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:08:51,046 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:08:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:08:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 352 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-10-27 08:08:51,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:08:51,868 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:08:51,868 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 399 with the following transitions: [2018-10-27 08:08:51,869 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:08:51,880 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:08:51,881 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:08:52,229 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:08:52,229 INFO L272 AbstractInterpreter]: Visited 143 different actions 280 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:08:52,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:08:52,259 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:08:52,656 INFO L227 lantSequenceWeakener]: Weakened 395 states. On average, predicates are now at 77.91% of their original sizes. [2018-10-27 08:08:52,658 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:08:52,813 INFO L415 sIntCurrentIteration]: We unified 397 AI predicates to 397 [2018-10-27 08:08:52,814 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:08:52,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:08:52,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-10-27 08:08:52,814 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:08:52,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:08:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:08:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:08:52,816 INFO L87 Difference]: Start difference. First operand 2659 states and 3544 transitions. Second operand 10 states. [2018-10-27 08:09:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:09:13,835 INFO L93 Difference]: Finished difference Result 5317 states and 7130 transitions. [2018-10-27 08:09:13,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 08:09:13,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 398 [2018-10-27 08:09:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:09:13,854 INFO L225 Difference]: With dead ends: 5317 [2018-10-27 08:09:13,854 INFO L226 Difference]: Without dead ends: 2847 [2018-10-27 08:09:13,862 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 405 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-10-27 08:09:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2018-10-27 08:09:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2844. [2018-10-27 08:09:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2018-10-27 08:09:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 3743 transitions. [2018-10-27 08:09:13,929 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 3743 transitions. Word has length 398 [2018-10-27 08:09:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:09:13,929 INFO L481 AbstractCegarLoop]: Abstraction has 2844 states and 3743 transitions. [2018-10-27 08:09:13,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 08:09:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 3743 transitions. [2018-10-27 08:09:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-27 08:09:13,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:09:13,941 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:09:13,942 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:09:13,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:09:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash -734433773, now seen corresponding path program 1 times [2018-10-27 08:09:13,942 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:09:13,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:09:13,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:09:13,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:09:13,944 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:09:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:09:14,270 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-27 08:09:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 315 proven. 124 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 08:09:14,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:09:14,456 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:09:14,457 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 400 with the following transitions: [2018-10-27 08:09:14,457 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:09:14,460 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:09:14,461 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:09:19,112 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:09:19,112 INFO L272 AbstractInterpreter]: Visited 121 different actions 362 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 08:09:19,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:09:19,116 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:09:19,927 INFO L227 lantSequenceWeakener]: Weakened 396 states. On average, predicates are now at 80.63% of their original sizes. [2018-10-27 08:09:19,927 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:09:20,038 INFO L415 sIntCurrentIteration]: We unified 398 AI predicates to 398 [2018-10-27 08:09:20,039 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:09:20,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:09:20,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-10-27 08:09:20,039 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:09:20,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:09:20,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:09:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:09:20,041 INFO L87 Difference]: Start difference. First operand 2844 states and 3743 transitions. Second operand 9 states. [2018-10-27 08:09:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:09:47,645 INFO L93 Difference]: Finished difference Result 5999 states and 8260 transitions. [2018-10-27 08:09:47,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 08:09:47,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 399 [2018-10-27 08:09:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:09:47,661 INFO L225 Difference]: With dead ends: 5999 [2018-10-27 08:09:47,661 INFO L226 Difference]: Without dead ends: 3529 [2018-10-27 08:09:47,671 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 405 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-27 08:09:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2018-10-27 08:09:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 3499. [2018-10-27 08:09:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3499 states. [2018-10-27 08:09:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 4548 transitions. [2018-10-27 08:09:47,751 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 4548 transitions. Word has length 399 [2018-10-27 08:09:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:09:47,752 INFO L481 AbstractCegarLoop]: Abstraction has 3499 states and 4548 transitions. [2018-10-27 08:09:47,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:09:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 4548 transitions. [2018-10-27 08:09:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2018-10-27 08:09:47,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:09:47,764 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:09:47,764 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:09:47,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:09:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1099351772, now seen corresponding path program 1 times [2018-10-27 08:09:47,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:09:47,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:09:47,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:09:47,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:09:47,766 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:09:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:09:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 546 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-27 08:09:48,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:09:48,466 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:09:48,466 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 485 with the following transitions: [2018-10-27 08:09:48,467 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:09:48,470 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:09:48,470 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:09:57,119 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:09:57,119 INFO L272 AbstractInterpreter]: Visited 123 different actions 492 times. Merged at 9 different actions 36 times. Never widened. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-27 08:09:57,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:09:57,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:09:57,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:09:57,129 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:09:57,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:09:57,139 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:09:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:09:57,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:09:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 546 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-27 08:09:57,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:09:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 546 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-27 08:09:58,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:09:58,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 08:09:58,151 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:09:58,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:09:58,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:09:58,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:09:58,153 INFO L87 Difference]: Start difference. First operand 3499 states and 4548 transitions. Second operand 9 states. [2018-10-27 08:10:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:10:09,024 INFO L93 Difference]: Finished difference Result 10956 states and 16295 transitions. [2018-10-27 08:10:09,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-27 08:10:09,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 484 [2018-10-27 08:10:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:10:09,069 INFO L225 Difference]: With dead ends: 10956 [2018-10-27 08:10:09,070 INFO L226 Difference]: Without dead ends: 7462 [2018-10-27 08:10:09,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 993 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=1555, Unknown=0, NotChecked=0, Total=1980 [2018-10-27 08:10:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2018-10-27 08:10:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 7421. [2018-10-27 08:10:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7421 states. [2018-10-27 08:10:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 10201 transitions. [2018-10-27 08:10:09,360 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 10201 transitions. Word has length 484 [2018-10-27 08:10:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:10:09,361 INFO L481 AbstractCegarLoop]: Abstraction has 7421 states and 10201 transitions. [2018-10-27 08:10:09,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:10:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 10201 transitions. [2018-10-27 08:10:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2018-10-27 08:10:09,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:10:09,405 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:10:09,405 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:10:09,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:09,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1691327639, now seen corresponding path program 1 times [2018-10-27 08:10:09,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:10:09,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:09,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:09,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:09,407 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:10:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 681 proven. 2 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-10-27 08:10:10,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:10:10,229 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:10:10,229 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 558 with the following transitions: [2018-10-27 08:10:10,230 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:10:10,240 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:10:10,240 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:10:16,538 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:10:16,539 INFO L272 AbstractInterpreter]: Visited 124 different actions 492 times. Merged at 9 different actions 32 times. Never widened. Found 8 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 08:10:16,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:16,552 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:10:16,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:10:16,552 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:10:16,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:16,563 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:10:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:16,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:10:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 681 proven. 2 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-10-27 08:10:16,989 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:10:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 681 proven. 2 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-10-27 08:10:17,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:10:17,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:10:17,406 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:10:17,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:10:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:10:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:10:17,408 INFO L87 Difference]: Start difference. First operand 7421 states and 10201 transitions. Second operand 9 states. [2018-10-27 08:10:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:10:20,993 INFO L93 Difference]: Finished difference Result 15464 states and 22474 transitions. [2018-10-27 08:10:20,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 08:10:20,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 557 [2018-10-27 08:10:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:10:21,041 INFO L225 Difference]: With dead ends: 15464 [2018-10-27 08:10:21,041 INFO L226 Difference]: Without dead ends: 7084 [2018-10-27 08:10:21,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1135 GetRequests, 1117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2018-10-27 08:10:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7084 states. [2018-10-27 08:10:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7084 to 6945. [2018-10-27 08:10:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6945 states. [2018-10-27 08:10:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6945 states to 6945 states and 9068 transitions. [2018-10-27 08:10:21,317 INFO L78 Accepts]: Start accepts. Automaton has 6945 states and 9068 transitions. Word has length 557 [2018-10-27 08:10:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:10:21,318 INFO L481 AbstractCegarLoop]: Abstraction has 6945 states and 9068 transitions. [2018-10-27 08:10:21,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:10:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6945 states and 9068 transitions. [2018-10-27 08:10:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2018-10-27 08:10:21,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:10:21,346 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:10:21,346 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:10:21,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:21,347 INFO L82 PathProgramCache]: Analyzing trace with hash -803429837, now seen corresponding path program 1 times [2018-10-27 08:10:21,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:10:21,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:21,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:21,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:21,348 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:10:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:22,740 WARN L179 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 08:10:23,236 WARN L179 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-27 08:10:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 615 proven. 411 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-10-27 08:10:24,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:10:24,130 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:10:24,130 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 562 with the following transitions: [2018-10-27 08:10:24,130 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:10:24,132 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:10:24,133 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:10:34,024 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:10:34,025 INFO L272 AbstractInterpreter]: Visited 125 different actions 496 times. Merged at 9 different actions 32 times. Never widened. Found 8 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 08:10:34,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:34,033 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:10:34,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:10:34,034 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:10:34,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:34,045 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:10:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:34,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:10:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-27 08:10:34,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:10:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-27 08:10:34,633 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:10:34,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [14] total 16 [2018-10-27 08:10:34,634 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:10:34,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:10:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:10:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-10-27 08:10:34,635 INFO L87 Difference]: Start difference. First operand 6945 states and 9068 transitions. Second operand 3 states. [2018-10-27 08:10:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:10:35,969 INFO L93 Difference]: Finished difference Result 18067 states and 25460 transitions. [2018-10-27 08:10:35,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:10:35,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 561 [2018-10-27 08:10:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:10:36,034 INFO L225 Difference]: With dead ends: 18067 [2018-10-27 08:10:36,034 INFO L226 Difference]: Without dead ends: 11311 [2018-10-27 08:10:36,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1123 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-10-27 08:10:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11311 states. [2018-10-27 08:10:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 10945. [2018-10-27 08:10:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10945 states. [2018-10-27 08:10:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 14297 transitions. [2018-10-27 08:10:36,381 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 14297 transitions. Word has length 561 [2018-10-27 08:10:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:10:36,382 INFO L481 AbstractCegarLoop]: Abstraction has 10945 states and 14297 transitions. [2018-10-27 08:10:36,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:10:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 14297 transitions. [2018-10-27 08:10:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2018-10-27 08:10:36,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:10:36,421 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:10:36,422 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:10:36,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1535827519, now seen corresponding path program 1 times [2018-10-27 08:10:36,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:10:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:36,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:36,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:10:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 600 proven. 429 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-10-27 08:10:37,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:10:37,535 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:10:37,535 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 570 with the following transitions: [2018-10-27 08:10:37,536 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 08:10:37,538 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:10:37,538 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:10:42,787 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:10:42,787 INFO L272 AbstractInterpreter]: Visited 124 different actions 492 times. Merged at 9 different actions 32 times. Never widened. Found 8 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 08:10:42,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:42,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:10:42,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:10:42,793 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:10:42,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:42,802 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:10:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:42,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:10:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 693 proven. 2 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2018-10-27 08:10:43,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:10:44,127 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-27 08:10:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 693 proven. 2 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2018-10-27 08:10:44,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:10:44,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-10-27 08:10:44,591 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:10:44,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 08:10:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 08:10:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-10-27 08:10:44,593 INFO L87 Difference]: Start difference. First operand 10945 states and 14297 transitions. Second operand 17 states. Received shutdown request... [2018-10-27 08:10:48,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 08:10:48,081 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 08:10:48,087 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 08:10:48,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:10:48 BoogieIcfgContainer [2018-10-27 08:10:48,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 08:10:48,088 INFO L168 Benchmark]: Toolchain (without parser) took 236853.34 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 959.2 MB. Max. memory is 7.1 GB. [2018-10-27 08:10:48,090 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 08:10:48,090 INFO L168 Benchmark]: CACSL2BoogieTranslator took 816.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-10-27 08:10:48,091 INFO L168 Benchmark]: Boogie Procedure Inliner took 243.74 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 715.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.0 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-27 08:10:48,092 INFO L168 Benchmark]: Boogie Preprocessor took 114.56 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:10:48,092 INFO L168 Benchmark]: RCFGBuilder took 3554.68 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 122.7 MB). Peak memory consumption was 122.7 MB. Max. memory is 7.1 GB. [2018-10-27 08:10:48,093 INFO L168 Benchmark]: TraceAbstraction took 232118.65 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 865.1 MB. Max. memory is 7.1 GB. [2018-10-27 08:10:48,099 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 816.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 243.74 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 715.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.0 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.56 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3554.68 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 122.7 MB). Peak memory consumption was 122.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232118.65 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 865.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 181]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 181). Cancelled while BasicCegarLoop was constructing difference of abstraction (10945states) and FLOYD_HOARE automaton (currently 16 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (1340 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 232.0s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 177.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1863 SDtfs, 8480 SDslu, 2709 SDs, 0 SdLazy, 19639 SolverSat, 3070 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 144.0s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 5918 GetRequests, 5755 SyntacticMatches, 4 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10945occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 35.9s AbstIntTime, 8 AbstIntIterations, 4 AbstIntStrong, 0.9974083598790224 AbsIntWeakeningRatio, 0.08701854493580599 AbsIntAvgWeakeningVarsNumRemoved, 16.22753209700428 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 584 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 5993 NumberOfCodeBlocks, 5993 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 8146 ConstructedInterpolants, 0 QuantifiedInterpolants, 12772871 SizeOfPredicates, 2 NumberOfNonLiveVariables, 3319 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 13683/14828 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown