java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 00:17:46,370 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 00:17:46,377 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 00:17:46,400 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 00:17:46,400 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 00:17:46,402 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 00:17:46,404 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 00:17:46,406 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 00:17:46,409 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 00:17:46,410 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 00:17:46,412 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 00:17:46,413 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 00:17:46,414 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 00:17:46,415 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 00:17:46,424 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 00:17:46,425 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 00:17:46,428 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 00:17:46,430 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 00:17:46,437 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 00:17:46,439 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 00:17:46,440 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 00:17:46,445 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 00:17:46,448 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 00:17:46,469 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 [2018-10-25 00:17:46,489 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 00:17:46,489 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 00:17:46,490 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 00:17:46,491 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 00:17:46,491 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 00:17:46,491 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 00:17:46,491 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 00:17:46,491 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 00:17:46,492 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 00:17:46,492 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 00:17:46,492 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 00:17:46,492 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 00:17:46,492 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 00:17:46,493 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 00:17:46,493 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 00:17:46,494 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 00:17:46,494 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 00:17:46,494 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 00:17:46,494 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 00:17:46,494 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 00:17:46,495 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 00:17:46,495 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 00:17:46,495 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 00:17:46,495 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 00:17:46,496 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 00:17:46,496 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 00:17:46,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 00:17:46,496 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 00:17:46,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 00:17:46,497 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 00:17:46,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 00:17:46,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 00:17:46,497 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 00:17:46,498 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 00:17:46,498 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 00:17:46,498 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 00:17:46,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 00:17:46,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 00:17:46,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 00:17:46,572 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 00:17:46,572 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 00:17:46,573 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c [2018-10-25 00:17:46,644 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ef3f07d35/95250a02d4a24dd1a466e640e2d1022c/FLAGb88cda685 [2018-10-25 00:17:47,315 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 00:17:47,317 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c [2018-10-25 00:17:47,335 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ef3f07d35/95250a02d4a24dd1a466e640e2d1022c/FLAGb88cda685 [2018-10-25 00:17:47,351 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ef3f07d35/95250a02d4a24dd1a466e640e2d1022c [2018-10-25 00:17:47,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 00:17:47,364 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 00:17:47,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 00:17:47,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 00:17:47,370 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 00:17:47,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 12:17:47" (1/1) ... [2018-10-25 00:17:47,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f637f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:47, skipping insertion in model container [2018-10-25 00:17:47,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 12:17:47" (1/1) ... [2018-10-25 00:17:47,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 00:17:47,482 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 00:17:48,263 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 00:17:48,268 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 00:17:48,497 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 00:17:48,522 INFO L193 MainTranslator]: Completed translation [2018-10-25 00:17:48,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48 WrapperNode [2018-10-25 00:17:48,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 00:17:48,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 00:17:48,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 00:17:48,524 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 00:17:48,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 00:17:48,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 00:17:48,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 00:17:48,857 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 00:17:48,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:48,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (1/1) ... [2018-10-25 00:17:49,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 00:17:49,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 00:17:49,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 00:17:49,004 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 00:17:49,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (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 [2018-10-25 00:17:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 00:17:49,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 00:17:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 00:17:49,075 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 00:17:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 00:17:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 00:17:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 00:17:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 00:17:53,764 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 00:17:53,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 12:17:53 BoogieIcfgContainer [2018-10-25 00:17:53,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 00:17:53,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 00:17:53,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 00:17:53,776 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 00:17:53,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 12:17:47" (1/3) ... [2018-10-25 00:17:53,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca3958a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 12:17:53, skipping insertion in model container [2018-10-25 00:17:53,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 12:17:48" (2/3) ... [2018-10-25 00:17:53,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca3958a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 12:17:53, skipping insertion in model container [2018-10-25 00:17:53,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 12:17:53" (3/3) ... [2018-10-25 00:17:53,781 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label49_true-unreach-call.c [2018-10-25 00:17:53,792 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 00:17:53,806 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 00:17:53,827 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 00:17:53,879 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 00:17:53,880 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 00:17:53,880 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 00:17:53,880 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 00:17:53,880 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 00:17:53,881 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 00:17:53,881 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 00:17:53,881 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 00:17:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-25 00:17:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-25 00:17:53,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:17:53,955 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:17:53,958 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:17:53,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:17:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1345868708, now seen corresponding path program 1 times [2018-10-25 00:17:53,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:17:54,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:17:54,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:17:54,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:17:54,020 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:17:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:17:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:17:55,034 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 00:17:55,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 00:17:55,034 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:17:55,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 00:17:55,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 00:17:55,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 00:17:55,066 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-25 00:17:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:17:57,215 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-10-25 00:17:57,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 00:17:57,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2018-10-25 00:17:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:17:57,241 INFO L225 Difference]: With dead ends: 844 [2018-10-25 00:17:57,242 INFO L226 Difference]: Without dead ends: 530 [2018-10-25 00:17:57,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 00:17:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-10-25 00:17:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-10-25 00:17:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-10-25 00:17:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-10-25 00:17:57,364 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 175 [2018-10-25 00:17:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:17:57,365 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-10-25 00:17:57,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 00:17:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-10-25 00:17:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-25 00:17:57,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:17:57,373 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:17:57,373 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:17:57,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:17:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash 396212824, now seen corresponding path program 1 times [2018-10-25 00:17:57,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:17:57,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:17:57,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:17:57,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:17:57,376 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:17:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:17:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:17:58,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:17:58,272 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:17:58,274 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 189 with the following transitions: [2018-10-25 00:17:58,276 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [861], [863], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:17:58,337 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:17:58,338 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:17:59,507 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 00:17:59,510 INFO L272 AbstractInterpreter]: Visited 175 different actions 175 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-25 00:17:59,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:17:59,563 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 00:18:00,650 INFO L232 lantSequenceWeakener]: Weakened 182 states. On average, predicates are now at 72.35% of their original sizes. [2018-10-25 00:18:00,651 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 00:18:01,141 INFO L413 sIntCurrentIteration]: We have 187 unified AI predicates [2018-10-25 00:18:01,142 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 00:18:01,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 00:18:01,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2018-10-25 00:18:01,143 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:18:01,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-25 00:18:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-25 00:18:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-10-25 00:18:01,146 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 12 states. [2018-10-25 00:18:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:18:25,603 INFO L93 Difference]: Finished difference Result 1254 states and 2061 transitions. [2018-10-25 00:18:25,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 00:18:25,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 188 [2018-10-25 00:18:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:18:25,611 INFO L225 Difference]: With dead ends: 1254 [2018-10-25 00:18:25,611 INFO L226 Difference]: Without dead ends: 735 [2018-10-25 00:18:25,616 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 188 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-10-25 00:18:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-10-25 00:18:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 733. [2018-10-25 00:18:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2018-10-25 00:18:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1081 transitions. [2018-10-25 00:18:25,648 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1081 transitions. Word has length 188 [2018-10-25 00:18:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:18:25,649 INFO L481 AbstractCegarLoop]: Abstraction has 733 states and 1081 transitions. [2018-10-25 00:18:25,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-25 00:18:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1081 transitions. [2018-10-25 00:18:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-25 00:18:25,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:18:25,653 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:18:25,653 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:18:25,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:18:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash -790774419, now seen corresponding path program 1 times [2018-10-25 00:18:25,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:18:25,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:18:25,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:18:25,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:18:25,656 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:18:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:18:26,066 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 00:18:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:18:26,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:18:26,187 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:18:26,187 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 198 with the following transitions: [2018-10-25 00:18:26,188 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [861], [863], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:18:26,199 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:18:26,199 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:18:28,924 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 00:18:28,924 INFO L272 AbstractInterpreter]: Visited 178 different actions 349 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:18:28,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:18:28,931 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 00:18:32,513 INFO L232 lantSequenceWeakener]: Weakened 2 states. On average, predicates are now at 90.7% of their original sizes. [2018-10-25 00:18:32,514 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 00:18:40,034 INFO L413 sIntCurrentIteration]: We have 196 unified AI predicates [2018-10-25 00:18:40,034 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 00:18:40,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 00:18:40,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2018-10-25 00:18:40,035 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:18:40,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-25 00:18:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-25 00:18:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-10-25 00:18:40,037 INFO L87 Difference]: Start difference. First operand 733 states and 1081 transitions. Second operand 12 states. [2018-10-25 00:20:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:20:11,621 INFO L93 Difference]: Finished difference Result 2198 states and 3474 transitions. [2018-10-25 00:20:11,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-25 00:20:11,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 197 [2018-10-25 00:20:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:20:11,631 INFO L225 Difference]: With dead ends: 2198 [2018-10-25 00:20:11,631 INFO L226 Difference]: Without dead ends: 1679 [2018-10-25 00:20:11,635 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 201 GetRequests, 69 SyntacticMatches, 117 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-25 00:20:11,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2018-10-25 00:20:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1675. [2018-10-25 00:20:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1675 states. [2018-10-25 00:20:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2393 transitions. [2018-10-25 00:20:11,688 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2393 transitions. Word has length 197 [2018-10-25 00:20:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:20:11,688 INFO L481 AbstractCegarLoop]: Abstraction has 1675 states and 2393 transitions. [2018-10-25 00:20:11,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-25 00:20:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2393 transitions. [2018-10-25 00:20:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-25 00:20:11,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:20:11,695 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:20:11,695 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:20:11,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:20:11,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1852838586, now seen corresponding path program 1 times [2018-10-25 00:20:11,696 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:20:11,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:20:11,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:20:11,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:20:11,697 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:20:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:20:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:20:11,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:20:11,904 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:20:11,904 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 202 with the following transitions: [2018-10-25 00:20:11,905 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [32], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [861], [863], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:20:11,913 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:20:11,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:20:12,764 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 00:20:12,764 INFO L272 AbstractInterpreter]: Visited 179 different actions 352 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:20:12,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:20:12,771 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 00:20:14,024 INFO L232 lantSequenceWeakener]: Weakened 198 states. On average, predicates are now at 72.29% of their original sizes. [2018-10-25 00:20:14,025 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 00:20:14,465 INFO L413 sIntCurrentIteration]: We have 200 unified AI predicates [2018-10-25 00:20:14,465 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 00:20:14,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 00:20:14,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-10-25 00:20:14,466 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:20:14,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-25 00:20:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-25 00:20:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-10-25 00:20:14,468 INFO L87 Difference]: Start difference. First operand 1675 states and 2393 transitions. Second operand 20 states. [2018-10-25 00:21:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:21:02,146 INFO L93 Difference]: Finished difference Result 2830 states and 4250 transitions. [2018-10-25 00:21:02,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-25 00:21:02,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2018-10-25 00:21:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:21:02,157 INFO L225 Difference]: With dead ends: 2830 [2018-10-25 00:21:02,157 INFO L226 Difference]: Without dead ends: 1887 [2018-10-25 00:21:02,162 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 209 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2018-10-25 00:21:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2018-10-25 00:21:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1886. [2018-10-25 00:21:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2018-10-25 00:21:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2621 transitions. [2018-10-25 00:21:02,216 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2621 transitions. Word has length 201 [2018-10-25 00:21:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:21:02,216 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 2621 transitions. [2018-10-25 00:21:02,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-25 00:21:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2621 transitions. [2018-10-25 00:21:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-25 00:21:02,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:21:02,223 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:21:02,223 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:21:02,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:21:02,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1452461868, now seen corresponding path program 1 times [2018-10-25 00:21:02,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:21:02,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:21:02,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:21:02,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:21:02,225 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:21:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:21:02,511 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 00:21:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-25 00:21:02,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:21:02,875 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:21:02,875 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-10-25 00:21:02,876 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [24], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [861], [863], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:21:02,883 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:21:02,884 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:21:08,345 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:21:08,346 INFO L272 AbstractInterpreter]: Visited 181 different actions 538 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-25 00:21:08,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:21:08,357 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:21:08,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:21:08,357 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 [2018-10-25 00:21:08,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:21:08,367 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:21:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:21:08,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:21:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-25 00:21:09,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:21:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-25 00:21:10,593 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 00:21:10,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Abandoning pump threads because process wont die! [2018-10-25 00:21:10,594 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:21:10,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 00:21:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 00:21:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-25 00:21:10,599 INFO L87 Difference]: Start difference. First operand 1886 states and 2621 transitions. Second operand 5 states. [2018-10-25 00:21:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:21:11,598 INFO L93 Difference]: Finished difference Result 3780 states and 5683 transitions. [2018-10-25 00:21:11,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-25 00:21:11,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2018-10-25 00:21:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:21:11,634 INFO L225 Difference]: With dead ends: 3780 [2018-10-25 00:21:11,634 INFO L226 Difference]: Without dead ends: 2837 [2018-10-25 00:21:11,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 410 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-25 00:21:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2018-10-25 00:21:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 2834. [2018-10-25 00:21:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2018-10-25 00:21:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 4157 transitions. [2018-10-25 00:21:11,738 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 4157 transitions. Word has length 210 [2018-10-25 00:21:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:21:11,738 INFO L481 AbstractCegarLoop]: Abstraction has 2834 states and 4157 transitions. [2018-10-25 00:21:11,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 00:21:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 4157 transitions. [2018-10-25 00:21:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-25 00:21:11,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:21:11,747 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:21:11,748 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:21:11,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:21:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1393647498, now seen corresponding path program 1 times [2018-10-25 00:21:11,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:21:11,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:21:11,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:21:11,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:21:11,750 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:21:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:21:12,042 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 00:21:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:21:12,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:21:12,847 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:21:12,848 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 210 with the following transitions: [2018-10-25 00:21:12,848 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [861], [863], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:21:12,855 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:21:12,856 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:21:19,500 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 00:21:19,500 INFO L272 AbstractInterpreter]: Visited 180 different actions 541 times. Merged at 7 different actions 25 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-25 00:21:19,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:21:19,510 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 00:21:19,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:21:19,510 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 [2018-10-25 00:21:19,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:21:19,519 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 00:21:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:21:19,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 00:21:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:21:19,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 00:21:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:21:20,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 00:21:20,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-25 00:21:20,054 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 00:21:20,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-25 00:21:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-25 00:21:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-25 00:21:20,056 INFO L87 Difference]: Start difference. First operand 2834 states and 4157 transitions. Second operand 12 states. [2018-10-25 00:21:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 00:21:26,519 INFO L93 Difference]: Finished difference Result 11345 states and 19116 transitions. [2018-10-25 00:21:26,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-25 00:21:26,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 209 [2018-10-25 00:21:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 00:21:26,588 INFO L225 Difference]: With dead ends: 11345 [2018-10-25 00:21:26,588 INFO L226 Difference]: Without dead ends: 9143 [2018-10-25 00:21:26,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 426 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2018-10-25 00:21:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9143 states. [2018-10-25 00:21:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9143 to 9120. [2018-10-25 00:21:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9120 states. [2018-10-25 00:21:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9120 states to 9120 states and 13086 transitions. [2018-10-25 00:21:26,910 INFO L78 Accepts]: Start accepts. Automaton has 9120 states and 13086 transitions. Word has length 209 [2018-10-25 00:21:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 00:21:26,911 INFO L481 AbstractCegarLoop]: Abstraction has 9120 states and 13086 transitions. [2018-10-25 00:21:26,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-25 00:21:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9120 states and 13086 transitions. [2018-10-25 00:21:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-10-25 00:21:26,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 00:21:26,947 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 00:21:26,947 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 00:21:26,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:21:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash -75325013, now seen corresponding path program 1 times [2018-10-25 00:21:26,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 00:21:26,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:21:26,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 00:21:26,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 00:21:26,950 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 00:21:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 00:21:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 00:21:27,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 00:21:27,606 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 00:21:27,607 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 301 with the following transitions: [2018-10-25 00:21:27,607 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [460], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [861], [863], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-25 00:21:27,614 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 00:21:27,614 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 00:21:29,019 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 00:21:29,020 INFO L272 AbstractInterpreter]: Visited 179 different actions 352 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-25 00:21:29,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 00:21:29,035 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 00:21:32,672 INFO L232 lantSequenceWeakener]: Weakened 2 states. On average, predicates are now at 81.4% of their original sizes. [2018-10-25 00:21:32,672 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 00:21:46,493 INFO L413 sIntCurrentIteration]: We have 299 unified AI predicates [2018-10-25 00:21:46,494 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 00:21:46,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 00:21:46,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-10-25 00:21:46,494 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 00:21:46,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-25 00:21:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-25 00:21:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-10-25 00:21:46,495 INFO L87 Difference]: Start difference. First operand 9120 states and 13086 transitions. Second operand 13 states. Received shutdown request... [2018-10-25 00:21:52,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-25 00:21:52,312 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-25 00:21:52,318 WARN L205 ceAbstractionStarter]: Timeout [2018-10-25 00:21:52,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 12:21:52 BoogieIcfgContainer [2018-10-25 00:21:52,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-25 00:21:52,320 INFO L168 Benchmark]: Toolchain (without parser) took 244956.45 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 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-25 00:21:52,321 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 00:21:52,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1157.45 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-25 00:21:52,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 332.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -874.3 MB). Peak memory consumption was 40.2 MB. Max. memory is 7.1 GB. [2018-10-25 00:21:52,324 INFO L168 Benchmark]: Boogie Preprocessor took 147.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-10-25 00:21:52,324 INFO L168 Benchmark]: RCFGBuilder took 4764.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 257.5 MB). Peak memory consumption was 257.5 MB. Max. memory is 7.1 GB. [2018-10-25 00:21:52,325 INFO L168 Benchmark]: TraceAbstraction took 238549.16 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.7 GB in the end (delta: -798.1 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-25 00:21:52,330 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1157.45 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 332.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -874.3 MB). Peak memory consumption was 40.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4764.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 257.5 MB). Peak memory consumption was 257.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238549.16 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.7 GB in the end (delta: -798.1 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1539]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1539). Cancelled while BasicCegarLoop was constructing difference of abstraction (9120states) and FLOYD_HOARE automaton (currently 11 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (140 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 238.4s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 179.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1738 SDtfs, 10833 SDslu, 2309 SDs, 0 SdLazy, 15198 SolverSat, 2557 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 127.3s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 1799 GetRequests, 1297 SyntacticMatches, 385 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 25.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9120occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 18.4s AbstIntTime, 6 AbstIntIterations, 4 AbstIntStrong, 0.9992043498982713 AbsIntWeakeningRatio, 0.26077097505668934 AbsIntAvgWeakeningVarsNumRemoved, 13.36734693877551 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 6 MinimizatonAttempts, 38 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 1899 NumberOfCodeBlocks, 1899 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 2307 ConstructedInterpolants, 0 QuantifiedInterpolants, 958288 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2217 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 438/492 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown