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/Problem17_label48_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 02:02:03,565 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 02:02:03,567 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 02:02:03,579 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 02:02:03,579 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 02:02:03,581 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 02:02:03,582 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 02:02:03,584 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 02:02:03,585 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 02:02:03,586 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 02:02:03,587 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 02:02:03,587 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 02:02:03,588 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 02:02:03,589 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 02:02:03,590 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 02:02:03,591 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 02:02:03,592 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 02:02:03,594 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 02:02:03,595 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 02:02:03,597 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 02:02:03,598 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 02:02:03,599 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 02:02:03,602 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-25 02:02:03,602 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-25 02:02:03,602 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-25 02:02:03,603 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-25 02:02:03,604 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-25 02:02:03,605 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-25 02:02:03,605 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-25 02:02:03,606 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-25 02:02:03,607 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-25 02:02:03,607 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-25 02:02:03,608 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-25 02:02:03,608 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-25 02:02:03,609 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-25 02:02:03,609 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-25 02:02:03,610 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 02:02:03,624 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 02:02:03,624 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 02:02:03,625 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 02:02:03,625 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 02:02:03,626 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 02:02:03,626 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 02:02:03,626 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 02:02:03,626 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 02:02:03,626 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 02:02:03,627 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 02:02:03,627 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 02:02:03,627 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 02:02:03,627 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 02:02:03,627 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 02:02:03,628 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 02:02:03,628 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 02:02:03,628 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 02:02:03,629 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 02:02:03,629 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 02:02:03,629 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 02:02:03,629 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 02:02:03,629 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 02:02:03,630 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 02:02:03,630 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 02:02:03,630 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 02:02:03,630 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 02:02:03,630 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 02:02:03,631 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 02:02:03,631 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 02:02:03,631 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 02:02:03,631 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 02:02:03,631 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 02:02:03,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 02:02:03,632 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 02:02:03,632 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 02:02:03,632 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 02:02:03,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 02:02:03,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 02:02:03,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 02:02:03,711 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 02:02:03,711 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 02:02:03,712 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label48_true-unreach-call.c [2018-10-25 02:02:03,776 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b58b83f05/c332c883627f4ce5b1ba15f3e4a80062/FLAG48ed4d358 [2018-10-25 02:02:04,528 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 02:02:04,529 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label48_true-unreach-call.c [2018-10-25 02:02:04,562 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b58b83f05/c332c883627f4ce5b1ba15f3e4a80062/FLAG48ed4d358 [2018-10-25 02:02:04,583 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b58b83f05/c332c883627f4ce5b1ba15f3e4a80062 [2018-10-25 02:02:04,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 02:02:04,598 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 02:02:04,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 02:02:04,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 02:02:04,608 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 02:02:04,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 02:02:04" (1/1) ... [2018-10-25 02:02:04,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@708368ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:04, skipping insertion in model container [2018-10-25 02:02:04,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 02:02:04" (1/1) ... [2018-10-25 02:02:04,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 02:02:04,744 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 02:02:05,748 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 02:02:05,752 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 02:02:06,185 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 02:02:06,207 INFO L193 MainTranslator]: Completed translation [2018-10-25 02:02:06,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06 WrapperNode [2018-10-25 02:02:06,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 02:02:06,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 02:02:06,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 02:02:06,209 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 02:02:06,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 02:02:06,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 02:02:06,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 02:02:06,663 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 02:02:06,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (1/1) ... [2018-10-25 02:02:06,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 02:02:06,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 02:02:06,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 02:02:06,965 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 02:02:06,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (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 02:02:07,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 02:02:07,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 02:02:07,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-25 02:02:07,038 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-25 02:02:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 02:02:07,038 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 02:02:07,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 02:02:07,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 02:02:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 02:02:07,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 02:02:21,208 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 02:02:21,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 02:02:21 BoogieIcfgContainer [2018-10-25 02:02:21,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 02:02:21,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 02:02:21,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 02:02:21,215 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 02:02:21,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 02:02:04" (1/3) ... [2018-10-25 02:02:21,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a7d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 02:02:21, skipping insertion in model container [2018-10-25 02:02:21,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 02:02:06" (2/3) ... [2018-10-25 02:02:21,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a7d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 02:02:21, skipping insertion in model container [2018-10-25 02:02:21,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 02:02:21" (3/3) ... [2018-10-25 02:02:21,218 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label48_true-unreach-call.c [2018-10-25 02:02:21,228 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 02:02:21,238 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 02:02:21,255 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 02:02:21,306 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 02:02:21,306 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 02:02:21,307 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 02:02:21,307 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 02:02:21,307 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 02:02:21,307 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 02:02:21,307 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 02:02:21,308 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 02:02:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-25 02:02:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-25 02:02:21,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:02:21,382 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] [2018-10-25 02:02:21,384 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:02:21,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:02:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1958130412, now seen corresponding path program 1 times [2018-10-25 02:02:21,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:02:21,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:21,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:02:21,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:21,448 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:02:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:02:21,901 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 02:02:21,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:02:21,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 02:02:21,904 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:02:21,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 02:02:21,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 02:02:21,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:02:21,930 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-25 02:02:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:02:33,420 INFO L93 Difference]: Finished difference Result 2142 states and 3971 transitions. [2018-10-25 02:02:33,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 02:02:33,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2018-10-25 02:02:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:02:33,457 INFO L225 Difference]: With dead ends: 2142 [2018-10-25 02:02:33,457 INFO L226 Difference]: Without dead ends: 1532 [2018-10-25 02:02:33,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:02:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2018-10-25 02:02:33,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1519. [2018-10-25 02:02:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2018-10-25 02:02:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2456 transitions. [2018-10-25 02:02:33,617 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2456 transitions. Word has length 50 [2018-10-25 02:02:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:02:33,619 INFO L481 AbstractCegarLoop]: Abstraction has 1519 states and 2456 transitions. [2018-10-25 02:02:33,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 02:02:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2456 transitions. [2018-10-25 02:02:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-25 02:02:33,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:02:33,632 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:33,633 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:02:33,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:02:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash 401546274, now seen corresponding path program 1 times [2018-10-25 02:02:33,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:02:33,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:33,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:02:33,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:33,636 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:02:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:02:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:02:33,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:02:33,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-25 02:02:33,997 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:02:34,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 02:02:34,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 02:02:34,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-25 02:02:34,000 INFO L87 Difference]: Start difference. First operand 1519 states and 2456 transitions. Second operand 5 states. [2018-10-25 02:02:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:02:43,760 INFO L93 Difference]: Finished difference Result 4424 states and 7338 transitions. [2018-10-25 02:02:43,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 02:02:43,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2018-10-25 02:02:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:02:43,790 INFO L225 Difference]: With dead ends: 4424 [2018-10-25 02:02:43,790 INFO L226 Difference]: Without dead ends: 2911 [2018-10-25 02:02:43,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-25 02:02:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-10-25 02:02:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2875. [2018-10-25 02:02:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2018-10-25 02:02:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 4373 transitions. [2018-10-25 02:02:43,890 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 4373 transitions. Word has length 122 [2018-10-25 02:02:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:02:43,891 INFO L481 AbstractCegarLoop]: Abstraction has 2875 states and 4373 transitions. [2018-10-25 02:02:43,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 02:02:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 4373 transitions. [2018-10-25 02:02:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-25 02:02:43,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:02:43,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:43,896 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:02:43,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:02:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash -335007702, now seen corresponding path program 1 times [2018-10-25 02:02:43,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:02:43,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:43,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:02:43,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:02:43,898 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:02:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:02:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:02:44,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:02:44,252 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:02:44,253 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 126 with the following transitions: [2018-10-25 02:02:44,255 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1010], [1012], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:02:44,300 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:02:44,300 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:02:45,966 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:02:45,968 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 02:02:46,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:02:46,004 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:02:46,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:02:46,004 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 02:02:46,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:02:46,021 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:02:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:02:46,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:03:12,859 WARN L179 SmtUtils]: Spent 24.23 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-25 02:03:33,151 WARN L179 SmtUtils]: Spent 16.10 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-25 02:03:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:03:33,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:03:36,108 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-25 02:03:36,319 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-25 02:03:38,974 WARN L179 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-25 02:03:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:03:39,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 02:03:39,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-25 02:03:39,372 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:03:39,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 02:03:39,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 02:03:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=162, Unknown=3, NotChecked=0, Total=210 [2018-10-25 02:03:39,375 INFO L87 Difference]: Start difference. First operand 2875 states and 4373 transitions. Second operand 6 states. [2018-10-25 02:03:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:03:54,495 INFO L93 Difference]: Finished difference Result 11147 states and 17674 transitions. [2018-10-25 02:03:54,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 02:03:54,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-10-25 02:03:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:03:54,553 INFO L225 Difference]: With dead ends: 11147 [2018-10-25 02:03:54,554 INFO L226 Difference]: Without dead ends: 8278 [2018-10-25 02:03:54,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=45, Invalid=162, Unknown=3, NotChecked=0, Total=210 [2018-10-25 02:03:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2018-10-25 02:03:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8237. [2018-10-25 02:03:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8237 states. [2018-10-25 02:03:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8237 states to 8237 states and 12331 transitions. [2018-10-25 02:03:54,851 INFO L78 Accepts]: Start accepts. Automaton has 8237 states and 12331 transitions. Word has length 125 [2018-10-25 02:03:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:03:54,852 INFO L481 AbstractCegarLoop]: Abstraction has 8237 states and 12331 transitions. [2018-10-25 02:03:54,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 02:03:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8237 states and 12331 transitions. [2018-10-25 02:03:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-25 02:03:54,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:03:54,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:54,860 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:03:54,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:03:54,860 INFO L82 PathProgramCache]: Analyzing trace with hash 904964573, now seen corresponding path program 1 times [2018-10-25 02:03:54,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:03:54,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:03:54,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:03:54,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:03:54,862 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:03:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:03:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:03:55,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:03:55,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-25 02:03:55,208 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:03:55,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 02:03:55,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 02:03:55,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 02:03:55,209 INFO L87 Difference]: Start difference. First operand 8237 states and 12331 transitions. Second operand 6 states. [2018-10-25 02:04:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:04:00,916 INFO L93 Difference]: Finished difference Result 20144 states and 30837 transitions. [2018-10-25 02:04:00,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 02:04:00,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2018-10-25 02:04:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:04:00,982 INFO L225 Difference]: With dead ends: 20144 [2018-10-25 02:04:00,983 INFO L226 Difference]: Without dead ends: 11913 [2018-10-25 02:04:01,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-25 02:04:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11913 states. [2018-10-25 02:04:01,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11913 to 11818. [2018-10-25 02:04:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11818 states. [2018-10-25 02:04:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11818 states to 11818 states and 15502 transitions. [2018-10-25 02:04:01,368 INFO L78 Accepts]: Start accepts. Automaton has 11818 states and 15502 transitions. Word has length 194 [2018-10-25 02:04:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:04:01,368 INFO L481 AbstractCegarLoop]: Abstraction has 11818 states and 15502 transitions. [2018-10-25 02:04:01,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 02:04:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 11818 states and 15502 transitions. [2018-10-25 02:04:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-25 02:04:01,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:04:01,377 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 02:04:01,377 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:04:01,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash 263151092, now seen corresponding path program 1 times [2018-10-25 02:04:01,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:04:01,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:01,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:01,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:01,381 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:04:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:01,760 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 02:04:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 107 proven. 51 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-25 02:04:02,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:02,201 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:04:02,201 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-10-25 02:04:02,202 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1010], [1012], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:04:02,207 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:04:02,207 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:04:02,940 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:04:02,940 INFO L272 AbstractInterpreter]: Visited 97 different actions 293 times. Merged at 7 different actions 25 times. Widened at 1 different actions 1 times. Found 3 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 02:04:02,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:02,968 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:04:02,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:02,968 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 02:04:02,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:02,984 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:04:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:03,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:04:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-25 02:04:03,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:04:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-25 02:04:03,399 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-25 02:04:03,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-25 02:04:03,399 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:04:03,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 02:04:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 02:04:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-25 02:04:03,401 INFO L87 Difference]: Start difference. First operand 11818 states and 15502 transitions. Second operand 3 states. [2018-10-25 02:04:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:04:10,713 INFO L93 Difference]: Finished difference Result 23630 states and 31057 transitions. [2018-10-25 02:04:10,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 02:04:10,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2018-10-25 02:04:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:04:10,759 INFO L225 Difference]: With dead ends: 23630 [2018-10-25 02:04:10,760 INFO L226 Difference]: Without dead ends: 11818 [2018-10-25 02:04:10,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 434 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-25 02:04:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11818 states. [2018-10-25 02:04:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11818 to 11818. [2018-10-25 02:04:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11818 states. [2018-10-25 02:04:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11818 states to 11818 states and 14772 transitions. [2018-10-25 02:04:11,032 INFO L78 Accepts]: Start accepts. Automaton has 11818 states and 14772 transitions. Word has length 217 [2018-10-25 02:04:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:04:11,033 INFO L481 AbstractCegarLoop]: Abstraction has 11818 states and 14772 transitions. [2018-10-25 02:04:11,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 02:04:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 11818 states and 14772 transitions. [2018-10-25 02:04:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-25 02:04:11,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:04:11,042 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 02:04:11,042 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:04:11,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash -738414857, now seen corresponding path program 1 times [2018-10-25 02:04:11,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:04:11,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:11,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:11,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:11,044 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:04:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-25 02:04:11,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:11,545 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:04:11,546 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 277 with the following transitions: [2018-10-25 02:04:11,546 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1010], [1012], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1531], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:04:11,552 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:04:11,552 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:04:12,271 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:04:12,271 INFO L272 AbstractInterpreter]: Visited 147 different actions 293 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-25 02:04:12,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:12,310 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:04:12,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:12,310 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) [2018-10-25 02:04:12,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:12,321 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 02:04:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:12,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:04:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-25 02:04:12,592 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:04:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 91 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:04:13,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:04:13,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-10-25 02:04:13,710 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:04:13,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 02:04:13,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 02:04:13,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-25 02:04:13,712 INFO L87 Difference]: Start difference. First operand 11818 states and 14772 transitions. Second operand 9 states. [2018-10-25 02:04:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:04:32,562 INFO L93 Difference]: Finished difference Result 48620 states and 67104 transitions. [2018-10-25 02:04:32,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-25 02:04:32,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 276 [2018-10-25 02:04:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:04:32,745 INFO L225 Difference]: With dead ends: 48620 [2018-10-25 02:04:32,745 INFO L226 Difference]: Without dead ends: 36808 [2018-10-25 02:04:32,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 546 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2018-10-25 02:04:32,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36808 states. [2018-10-25 02:04:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36808 to 35292. [2018-10-25 02:04:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35292 states. [2018-10-25 02:04:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35292 states to 35292 states and 43479 transitions. [2018-10-25 02:04:33,737 INFO L78 Accepts]: Start accepts. Automaton has 35292 states and 43479 transitions. Word has length 276 [2018-10-25 02:04:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:04:33,738 INFO L481 AbstractCegarLoop]: Abstraction has 35292 states and 43479 transitions. [2018-10-25 02:04:33,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 02:04:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 35292 states and 43479 transitions. [2018-10-25 02:04:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-10-25 02:04:33,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:04:33,760 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:33,760 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:04:33,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1681249414, now seen corresponding path program 1 times [2018-10-25 02:04:33,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:04:33,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:33,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:33,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:33,762 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:04:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-10-25 02:04:34,250 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 02:04:34,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 02:04:34,250 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 02:04:34,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 02:04:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 02:04:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:04:34,252 INFO L87 Difference]: Start difference. First operand 35292 states and 43479 transitions. Second operand 4 states. [2018-10-25 02:04:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:04:42,523 INFO L93 Difference]: Finished difference Result 86350 states and 108195 transitions. [2018-10-25 02:04:42,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 02:04:42,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 373 [2018-10-25 02:04:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:04:42,724 INFO L225 Difference]: With dead ends: 86350 [2018-10-25 02:04:42,725 INFO L226 Difference]: Without dead ends: 51064 [2018-10-25 02:04:42,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 02:04:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51064 states. [2018-10-25 02:04:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51064 to 48419. [2018-10-25 02:04:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48419 states. [2018-10-25 02:04:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48419 states to 48419 states and 59087 transitions. [2018-10-25 02:04:43,797 INFO L78 Accepts]: Start accepts. Automaton has 48419 states and 59087 transitions. Word has length 373 [2018-10-25 02:04:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:04:43,798 INFO L481 AbstractCegarLoop]: Abstraction has 48419 states and 59087 transitions. [2018-10-25 02:04:43,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 02:04:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 48419 states and 59087 transitions. [2018-10-25 02:04:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-10-25 02:04:43,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:04:43,835 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:43,835 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:04:43,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:43,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2108161546, now seen corresponding path program 1 times [2018-10-25 02:04:43,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:04:43,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:43,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:43,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:04:43,837 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:04:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:44,418 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-25 02:04:44,977 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-10-25 02:04:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 168 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-10-25 02:04:45,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:45,988 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:04:45,988 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 415 with the following transitions: [2018-10-25 02:04:45,988 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1010], [1012], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:04:45,996 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:04:45,996 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:04:47,393 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:04:47,394 INFO L272 AbstractInterpreter]: Visited 189 different actions 553 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 02:04:47,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:04:47,432 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:04:47,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:04:47,432 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 [2018-10-25 02:04:47,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:04:47,444 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:04:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:04:47,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:04:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-25 02:04:47,764 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:04:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 207 proven. 109 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-25 02:04:49,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:04:49,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2018-10-25 02:04:49,162 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:04:49,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-25 02:04:49,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-25 02:04:49,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-10-25 02:04:49,164 INFO L87 Difference]: Start difference. First operand 48419 states and 59087 transitions. Second operand 15 states. [2018-10-25 02:05:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:05:04,199 INFO L93 Difference]: Finished difference Result 137195 states and 167564 transitions. [2018-10-25 02:05:04,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-25 02:05:04,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 414 [2018-10-25 02:05:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:05:04,376 INFO L225 Difference]: With dead ends: 137195 [2018-10-25 02:05:04,376 INFO L226 Difference]: Without dead ends: 53386 [2018-10-25 02:05:04,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 836 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2018-10-25 02:05:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53386 states. [2018-10-25 02:05:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53386 to 49809. [2018-10-25 02:05:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49809 states. [2018-10-25 02:05:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49809 states to 49809 states and 59059 transitions. [2018-10-25 02:05:05,416 INFO L78 Accepts]: Start accepts. Automaton has 49809 states and 59059 transitions. Word has length 414 [2018-10-25 02:05:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:05:05,416 INFO L481 AbstractCegarLoop]: Abstraction has 49809 states and 59059 transitions. [2018-10-25 02:05:05,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-25 02:05:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49809 states and 59059 transitions. [2018-10-25 02:05:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-10-25 02:05:05,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:05:05,436 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 02:05:05,436 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:05:05,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:05:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash 652122830, now seen corresponding path program 1 times [2018-10-25 02:05:05,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:05:05,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:05:05,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:05:05,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:05:05,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:05:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:05:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 135 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-25 02:05:05,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:05:05,976 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:05:05,976 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 426 with the following transitions: [2018-10-25 02:05:05,976 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1010], [1012], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:05:05,981 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:05:05,982 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:05:06,437 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:05:06,437 INFO L272 AbstractInterpreter]: Visited 189 different actions 379 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-25 02:05:06,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:05:06,476 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:05:06,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:05:06,477 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 02:05:06,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:05:06,488 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:05:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:05:06,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:05:06,878 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 17 [2018-10-25 02:05:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-25 02:05:07,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:05:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-25 02:05:08,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:05:08,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-10-25 02:05:08,118 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:05:08,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-25 02:05:08,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-25 02:05:08,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-25 02:05:08,120 INFO L87 Difference]: Start difference. First operand 49809 states and 59059 transitions. Second operand 10 states. [2018-10-25 02:05:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 02:05:27,645 INFO L93 Difference]: Finished difference Result 133938 states and 161872 transitions. [2018-10-25 02:05:27,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-25 02:05:27,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 425 [2018-10-25 02:05:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 02:05:27,862 INFO L225 Difference]: With dead ends: 133938 [2018-10-25 02:05:27,863 INFO L226 Difference]: Without dead ends: 84569 [2018-10-25 02:05:27,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 863 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2018-10-25 02:05:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84569 states. [2018-10-25 02:05:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84569 to 76389. [2018-10-25 02:05:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76389 states. [2018-10-25 02:05:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76389 states to 76389 states and 89382 transitions. [2018-10-25 02:05:29,184 INFO L78 Accepts]: Start accepts. Automaton has 76389 states and 89382 transitions. Word has length 425 [2018-10-25 02:05:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 02:05:29,185 INFO L481 AbstractCegarLoop]: Abstraction has 76389 states and 89382 transitions. [2018-10-25 02:05:29,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-25 02:05:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 76389 states and 89382 transitions. [2018-10-25 02:05:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-10-25 02:05:29,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 02:05:29,195 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:29,195 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 02:05:29,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:05:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1084876622, now seen corresponding path program 1 times [2018-10-25 02:05:29,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 02:05:29,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:05:29,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:05:29,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 02:05:29,197 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 02:05:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:05:30,123 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-10-25 02:05:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 133 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 02:05:31,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:05:31,761 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 02:05:31,761 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 428 with the following transitions: [2018-10-25 02:05:31,762 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1010], [1012], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 02:05:31,765 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 02:05:31,765 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 02:05:32,340 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 02:05:32,340 INFO L272 AbstractInterpreter]: Visited 189 different actions 379 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-25 02:05:32,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 02:05:32,380 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 02:05:32,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 02:05:32,380 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 02:05:32,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 02:05:32,395 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 02:05:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 02:05:32,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 02:05:39,080 WARN L179 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-10-25 02:05:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-25 02:05:39,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 02:05:39,524 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-10-25 02:05:39,938 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-25 02:05:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 135 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-25 02:05:40,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 02:05:40,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 28 [2018-10-25 02:05:40,897 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 02:05:40,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-25 02:05:40,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-25 02:05:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2018-10-25 02:05:40,898 INFO L87 Difference]: Start difference. First operand 76389 states and 89382 transitions. Second operand 23 states. [2018-10-25 02:05:45,269 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2018-10-25 02:05:49,246 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2018-10-25 02:05:53,406 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 Received shutdown request... [2018-10-25 02:06:00,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-25 02:06:00,649 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-25 02:06:00,654 WARN L205 ceAbstractionStarter]: Timeout [2018-10-25 02:06:00,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 02:06:00 BoogieIcfgContainer [2018-10-25 02:06:00,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-25 02:06:00,655 INFO L168 Benchmark]: Toolchain (without parser) took 236058.81 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -995.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-25 02:06:00,657 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-10-25 02:06:00,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1608.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-25 02:06:00,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 454.54 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 735.1 MB). Free memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: -887.8 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-25 02:06:00,659 INFO L168 Benchmark]: Boogie Preprocessor took 301.15 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2018-10-25 02:06:00,660 INFO L168 Benchmark]: RCFGBuilder took 14245.70 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 464.7 MB). Peak memory consumption was 464.7 MB. Max. memory is 7.1 GB. [2018-10-25 02:06:00,660 INFO L168 Benchmark]: TraceAbstraction took 219443.02 ms. Allocated memory was 2.2 GB in the beginning and 3.9 GB in the end (delta: 1.7 GB). Free memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: -738.4 MB). Peak memory consumption was 971.3 MB. Max. memory is 7.1 GB. [2018-10-25 02:06:00,665 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1608.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 454.54 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 735.1 MB). Free memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: -887.8 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 301.15 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14245.70 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 464.7 MB). Peak memory consumption was 464.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219443.02 ms. Allocated memory was 2.2 GB in the beginning and 3.9 GB in the end (delta: 1.7 GB). Free memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: -738.4 MB). Peak memory consumption was 971.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 137]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 137). Cancelled while BasicCegarLoop was constructing difference of abstraction (76389states) and FLOYD_HOARE automaton (currently 60 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 83 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 219.3s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 132.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3314 SDtfs, 39034 SDslu, 3670 SDs, 0 SdLazy, 44976 SolverSat, 11274 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 110.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4009 GetRequests, 3777 SyntacticMatches, 23 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2574 ImplicationChecksByTransitivity, 69.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76389occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.8s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16103 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 71.9s InterpolantComputationTime, 4507 NumberOfCodeBlocks, 4507 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6369 ConstructedInterpolants, 322 QuantifiedInterpolants, 14907381 SizeOfPredicates, 13 NumberOfNonLiveVariables, 3129 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 4018/5272 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown