java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:31:38,643 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:31:38,646 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:31:38,667 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:31:38,667 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:31:38,668 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:31:38,670 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:31:38,672 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:31:38,673 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:31:38,674 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:31:38,675 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:31:38,676 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:31:38,677 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:31:38,678 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:31:38,679 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:31:38,680 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:31:38,681 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:31:38,683 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:31:38,685 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:31:38,686 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:31:38,688 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:31:38,691 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:31:38,697 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 05:31:38,697 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 05:31:38,697 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 05:31:38,698 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 05:31:38,699 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 05:31:38,700 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 05:31:38,701 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 05:31:38,702 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 05:31:38,702 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 05:31:38,703 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 05:31:38,705 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 05:31:38,721 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:31:38,721 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:31:38,722 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:31:38,722 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:31:38,722 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:31:38,722 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:31:38,723 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 05:31:38,723 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:31:38,723 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 05:31:38,723 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:31:38,723 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 05:31:38,724 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:31:38,724 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:31:38,724 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:31:38,725 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:31:38,725 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:31:38,725 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:31:38,725 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:31:38,726 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:31:38,726 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:31:38,726 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:31:38,726 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:31:38,727 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:31:38,727 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:31:38,727 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:31:38,727 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:31:38,727 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:31:38,728 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:31:38,728 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:31:38,728 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:31:38,728 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:31:38,728 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:31:38,729 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:31:38,729 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:31:38,729 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 05:31:38,729 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 05:31:38,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:31:38,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:31:38,814 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:31:38,816 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:31:38,817 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:31:38,818 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c [2018-10-27 05:31:38,887 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1dafacddc/b113ed15098148db89dd1639399a1b4f/FLAGc988b136a [2018-10-27 05:31:39,454 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:31:39,455 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c [2018-10-27 05:31:39,483 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1dafacddc/b113ed15098148db89dd1639399a1b4f/FLAGc988b136a [2018-10-27 05:31:39,504 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1dafacddc/b113ed15098148db89dd1639399a1b4f [2018-10-27 05:31:39,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:31:39,521 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 05:31:39,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:31:39,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:31:39,527 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:31:39,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:31:39" (1/1) ... [2018-10-27 05:31:39,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee9ef4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:39, skipping insertion in model container [2018-10-27 05:31:39,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:31:39" (1/1) ... [2018-10-27 05:31:39,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:31:39,629 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:31:40,194 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:31:40,199 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:31:40,340 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:31:40,361 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:31:40,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40 WrapperNode [2018-10-27 05:31:40,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:31:40,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:31:40,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:31:40,364 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:31:40,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:31:40,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:31:40,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:31:40,631 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:31:40,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... [2018-10-27 05:31:40,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:31:40,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:31:40,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:31:40,759 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:31:40,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:31:40,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:31:40,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:31:40,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 05:31:40,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 05:31:40,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:31:40,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:31:40,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:31:40,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:31:44,321 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:31:44,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:31:44 BoogieIcfgContainer [2018-10-27 05:31:44,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:31:44,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:31:44,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:31:44,328 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:31:44,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:31:39" (1/3) ... [2018-10-27 05:31:44,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a95201f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:31:44, skipping insertion in model container [2018-10-27 05:31:44,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:40" (2/3) ... [2018-10-27 05:31:44,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a95201f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:31:44, skipping insertion in model container [2018-10-27 05:31:44,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:31:44" (3/3) ... [2018-10-27 05:31:44,332 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label54_false-unreach-call_false-termination.c [2018-10-27 05:31:44,343 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:31:44,353 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 05:31:44,372 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 05:31:44,412 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:31:44,412 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:31:44,413 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:31:44,413 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:31:44,413 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:31:44,413 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:31:44,414 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:31:44,414 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:31:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 05:31:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-27 05:31:44,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:31:44,454 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:31:44,456 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:31:44,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1737204119, now seen corresponding path program 1 times [2018-10-27 05:31:44,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:31:44,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:44,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:44,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:44,528 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:31:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:31:44,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:31:44,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:31:44,752 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:31:44,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:31:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:31:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:31:44,781 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-27 05:31:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:31:47,429 INFO L93 Difference]: Finished difference Result 707 states and 1242 transitions. [2018-10-27 05:31:47,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:31:47,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-27 05:31:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:31:47,453 INFO L225 Difference]: With dead ends: 707 [2018-10-27 05:31:47,453 INFO L226 Difference]: Without dead ends: 450 [2018-10-27 05:31:47,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:31:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2018-10-27 05:31:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2018-10-27 05:31:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-10-27 05:31:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 678 transitions. [2018-10-27 05:31:47,548 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 678 transitions. Word has length 13 [2018-10-27 05:31:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:31:47,548 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 678 transitions. [2018-10-27 05:31:47,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:31:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 678 transitions. [2018-10-27 05:31:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-27 05:31:47,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:31:47,554 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 05:31:47,554 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:31:47,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1515047808, now seen corresponding path program 1 times [2018-10-27 05:31:47,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:31:47,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:47,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:47,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:47,557 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:31:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:31:47,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:31:47,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:31:47,828 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:31:47,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:31:47,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:31:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:31:47,831 INFO L87 Difference]: Start difference. First operand 450 states and 678 transitions. Second operand 3 states. [2018-10-27 05:31:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:31:49,335 INFO L93 Difference]: Finished difference Result 1260 states and 1959 transitions. [2018-10-27 05:31:49,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:31:49,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2018-10-27 05:31:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:31:49,345 INFO L225 Difference]: With dead ends: 1260 [2018-10-27 05:31:49,345 INFO L226 Difference]: Without dead ends: 816 [2018-10-27 05:31:49,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:31:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2018-10-27 05:31:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2018-10-27 05:31:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2018-10-27 05:31:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1139 transitions. [2018-10-27 05:31:49,399 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1139 transitions. Word has length 97 [2018-10-27 05:31:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:31:49,400 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1139 transitions. [2018-10-27 05:31:49,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:31:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1139 transitions. [2018-10-27 05:31:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-27 05:31:49,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:31:49,405 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 05:31:49,405 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:31:49,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash -966929960, now seen corresponding path program 1 times [2018-10-27 05:31:49,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:31:49,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:49,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:49,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:49,407 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:31:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:31:49,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:49,737 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:31:49,738 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 110 with the following transitions: [2018-10-27 05:31:49,741 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:31:49,790 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:31:49,791 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:31:50,331 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:31:50,340 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 05:31:50,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:50,356 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:31:50,704 INFO L227 lantSequenceWeakener]: Weakened 103 states. On average, predicates are now at 77.03% of their original sizes. [2018-10-27 05:31:50,704 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:31:50,800 INFO L415 sIntCurrentIteration]: We unified 108 AI predicates to 108 [2018-10-27 05:31:50,801 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:31:50,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:31:50,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-27 05:31:50,802 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:31:50,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:31:50,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:31:50,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:31:50,804 INFO L87 Difference]: Start difference. First operand 816 states and 1139 transitions. Second operand 6 states. [2018-10-27 05:32:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:32:07,914 INFO L93 Difference]: Finished difference Result 1811 states and 2515 transitions. [2018-10-27 05:32:07,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:32:07,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-10-27 05:32:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:32:07,920 INFO L225 Difference]: With dead ends: 1811 [2018-10-27 05:32:07,920 INFO L226 Difference]: Without dead ends: 1001 [2018-10-27 05:32:07,923 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 05:32:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2018-10-27 05:32:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 999. [2018-10-27 05:32:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2018-10-27 05:32:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1330 transitions. [2018-10-27 05:32:07,959 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1330 transitions. Word has length 109 [2018-10-27 05:32:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:32:07,959 INFO L481 AbstractCegarLoop]: Abstraction has 999 states and 1330 transitions. [2018-10-27 05:32:07,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:32:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1330 transitions. [2018-10-27 05:32:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-27 05:32:07,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:32:07,967 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 05:32:07,967 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:32:07,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:32:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1447044886, now seen corresponding path program 1 times [2018-10-27 05:32:07,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:32:07,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:32:07,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:32:07,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:32:07,970 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:32:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:32:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:32:08,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:32:08,929 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:32:08,930 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2018-10-27 05:32:08,930 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:32:08,937 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:32:08,938 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:32:09,078 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:32:09,079 INFO L272 AbstractInterpreter]: Visited 104 different actions 201 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 05:32:09,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:32:09,112 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:32:09,355 INFO L227 lantSequenceWeakener]: Weakened 191 states. On average, predicates are now at 77.25% of their original sizes. [2018-10-27 05:32:09,355 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:32:09,708 INFO L415 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2018-10-27 05:32:09,709 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:32:09,709 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:32:09,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-10-27 05:32:09,709 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:32:09,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:32:09,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:32:09,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:32:09,710 INFO L87 Difference]: Start difference. First operand 999 states and 1330 transitions. Second operand 10 states. [2018-10-27 05:32:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:32:45,779 INFO L93 Difference]: Finished difference Result 2367 states and 3171 transitions. [2018-10-27 05:32:45,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 05:32:45,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 194 [2018-10-27 05:32:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:32:45,788 INFO L225 Difference]: With dead ends: 2367 [2018-10-27 05:32:45,788 INFO L226 Difference]: Without dead ends: 1557 [2018-10-27 05:32:45,792 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 202 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:32:45,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2018-10-27 05:32:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1554. [2018-10-27 05:32:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2018-10-27 05:32:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 1927 transitions. [2018-10-27 05:32:45,834 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 1927 transitions. Word has length 194 [2018-10-27 05:32:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:32:45,835 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 1927 transitions. [2018-10-27 05:32:45,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:32:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 1927 transitions. [2018-10-27 05:32:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-27 05:32:45,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:32:45,841 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 05:32:45,841 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:32:45,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:32:45,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2114463494, now seen corresponding path program 1 times [2018-10-27 05:32:45,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:32:45,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:32:45,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:32:45,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:32:45,843 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:32:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:32:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-27 05:32:46,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:32:46,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:32:46,122 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:32:46,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:32:46,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:32:46,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:32:46,123 INFO L87 Difference]: Start difference. First operand 1554 states and 1927 transitions. Second operand 4 states. [2018-10-27 05:32:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:32:48,502 INFO L93 Difference]: Finished difference Result 3096 states and 4300 transitions. [2018-10-27 05:32:48,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:32:48,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2018-10-27 05:32:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:32:48,517 INFO L225 Difference]: With dead ends: 3096 [2018-10-27 05:32:48,518 INFO L226 Difference]: Without dead ends: 2286 [2018-10-27 05:32:48,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:32:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2018-10-27 05:32:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2018-10-27 05:32:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2286 states. [2018-10-27 05:32:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 2983 transitions. [2018-10-27 05:32:48,616 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 2983 transitions. Word has length 234 [2018-10-27 05:32:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:32:48,617 INFO L481 AbstractCegarLoop]: Abstraction has 2286 states and 2983 transitions. [2018-10-27 05:32:48,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:32:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 2983 transitions. [2018-10-27 05:32:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-27 05:32:48,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:32:48,630 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 05:32:48,630 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:32:48,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:32:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1572952161, now seen corresponding path program 1 times [2018-10-27 05:32:48,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:32:48,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:32:48,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:32:48,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:32:48,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:32:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:32:49,312 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-27 05:32:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 191 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:32:50,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:32:50,063 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:32:50,063 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 295 with the following transitions: [2018-10-27 05:32:50,067 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:32:50,071 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:32:50,071 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:32:50,245 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:32:50,245 INFO L272 AbstractInterpreter]: Visited 120 different actions 234 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 05:32:50,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:32:50,252 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:32:50,547 INFO L227 lantSequenceWeakener]: Weakened 291 states. On average, predicates are now at 77.31% of their original sizes. [2018-10-27 05:32:50,548 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:32:50,735 INFO L415 sIntCurrentIteration]: We unified 293 AI predicates to 293 [2018-10-27 05:32:50,735 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:32:50,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:32:50,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2018-10-27 05:32:50,736 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:32:50,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:32:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:32:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:32:50,737 INFO L87 Difference]: Start difference. First operand 2286 states and 2983 transitions. Second operand 10 states. [2018-10-27 05:33:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:33:08,328 INFO L93 Difference]: Finished difference Result 4571 states and 5985 transitions. [2018-10-27 05:33:08,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 05:33:08,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 294 [2018-10-27 05:33:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:33:08,342 INFO L225 Difference]: With dead ends: 4571 [2018-10-27 05:33:08,342 INFO L226 Difference]: Without dead ends: 2474 [2018-10-27 05:33:08,350 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 301 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-10-27 05:33:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2018-10-27 05:33:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2471. [2018-10-27 05:33:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2018-10-27 05:33:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3175 transitions. [2018-10-27 05:33:08,410 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3175 transitions. Word has length 294 [2018-10-27 05:33:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:33:08,410 INFO L481 AbstractCegarLoop]: Abstraction has 2471 states and 3175 transitions. [2018-10-27 05:33:08,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:33:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3175 transitions. [2018-10-27 05:33:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-27 05:33:08,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:33:08,417 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 05:33:08,417 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:33:08,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:33:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash -695505714, now seen corresponding path program 1 times [2018-10-27 05:33:08,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:33:08,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:08,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:33:08,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:08,419 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:33:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:33:08,771 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-27 05:33:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 156 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 05:33:09,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:33:09,214 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:33:09,215 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-10-27 05:33:09,215 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:33:09,223 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:33:09,224 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:33:14,424 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:33:14,425 INFO L272 AbstractInterpreter]: Visited 120 different actions 359 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 05:33:14,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:33:14,466 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:33:15,375 INFO L227 lantSequenceWeakener]: Weakened 302 states. On average, predicates are now at 79.94% of their original sizes. [2018-10-27 05:33:15,376 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:33:15,485 INFO L415 sIntCurrentIteration]: We unified 304 AI predicates to 304 [2018-10-27 05:33:15,486 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:33:15,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:33:15,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-10-27 05:33:15,486 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:33:15,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:33:15,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:33:15,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-27 05:33:15,488 INFO L87 Difference]: Start difference. First operand 2471 states and 3175 transitions. Second operand 9 states. [2018-10-27 05:33:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:33:45,757 INFO L93 Difference]: Finished difference Result 5997 states and 8212 transitions. [2018-10-27 05:33:45,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 05:33:45,758 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 305 [2018-10-27 05:33:45,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:33:45,780 INFO L225 Difference]: With dead ends: 5997 [2018-10-27 05:33:45,780 INFO L226 Difference]: Without dead ends: 3900 [2018-10-27 05:33:45,792 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 311 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:33:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2018-10-27 05:33:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 3872. [2018-10-27 05:33:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3872 states. [2018-10-27 05:33:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 4891 transitions. [2018-10-27 05:33:45,886 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 4891 transitions. Word has length 305 [2018-10-27 05:33:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:33:45,886 INFO L481 AbstractCegarLoop]: Abstraction has 3872 states and 4891 transitions. [2018-10-27 05:33:45,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:33:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 4891 transitions. [2018-10-27 05:33:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-27 05:33:45,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:33:45,893 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-10-27 05:33:45,893 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:33:45,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:33:45,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1390657654, now seen corresponding path program 1 times [2018-10-27 05:33:45,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:33:45,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:45,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:33:45,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:45,895 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:33:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:33:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-27 05:33:46,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:33:46,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:33:46,111 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:33:46,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:33:46,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:33:46,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:33:46,112 INFO L87 Difference]: Start difference. First operand 3872 states and 4891 transitions. Second operand 3 states. [2018-10-27 05:33:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:33:47,212 INFO L93 Difference]: Finished difference Result 7918 states and 10619 transitions. [2018-10-27 05:33:47,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:33:47,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 319 [2018-10-27 05:33:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:33:47,243 INFO L225 Difference]: With dead ends: 7918 [2018-10-27 05:33:47,244 INFO L226 Difference]: Without dead ends: 4974 [2018-10-27 05:33:47,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:33:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4974 states. [2018-10-27 05:33:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4974 to 4974. [2018-10-27 05:33:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4974 states. [2018-10-27 05:33:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4974 states to 4974 states and 6198 transitions. [2018-10-27 05:33:47,405 INFO L78 Accepts]: Start accepts. Automaton has 4974 states and 6198 transitions. Word has length 319 [2018-10-27 05:33:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:33:47,406 INFO L481 AbstractCegarLoop]: Abstraction has 4974 states and 6198 transitions. [2018-10-27 05:33:47,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:33:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4974 states and 6198 transitions. [2018-10-27 05:33:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-10-27 05:33:47,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:33:47,419 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-27 05:33:47,420 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:33:47,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:33:47,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1800670833, now seen corresponding path program 1 times [2018-10-27 05:33:47,424 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:33:47,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:47,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:33:47,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:47,429 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:33:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:33:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 117 proven. 166 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-10-27 05:33:47,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:33:47,958 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:33:47,958 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 380 with the following transitions: [2018-10-27 05:33:47,958 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:33:47,962 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:33:47,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:33:48,407 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:33:48,408 INFO L272 AbstractInterpreter]: Visited 122 different actions 487 times. Merged at 9 different actions 35 times. Never widened. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-27 05:33:48,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:33:48,451 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:33:48,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:33:48,451 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:33:48,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:33:48,466 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:33:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:33:48,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:33:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-10-27 05:33:49,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:33:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 117 proven. 166 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-10-27 05:33:49,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:33:49,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 05:33:49,695 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:33:49,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:33:49,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:33:49,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:33:49,697 INFO L87 Difference]: Start difference. First operand 4974 states and 6198 transitions. Second operand 9 states. [2018-10-27 05:33:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:33:59,067 INFO L93 Difference]: Finished difference Result 10487 states and 13442 transitions. [2018-10-27 05:33:59,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-27 05:33:59,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 379 [2018-10-27 05:33:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:33:59,090 INFO L225 Difference]: With dead ends: 10487 [2018-10-27 05:33:59,090 INFO L226 Difference]: Without dead ends: 5334 [2018-10-27 05:33:59,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 775 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:33:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2018-10-27 05:33:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5316. [2018-10-27 05:33:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5316 states. [2018-10-27 05:33:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 6395 transitions. [2018-10-27 05:33:59,248 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 6395 transitions. Word has length 379 [2018-10-27 05:33:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:33:59,248 INFO L481 AbstractCegarLoop]: Abstraction has 5316 states and 6395 transitions. [2018-10-27 05:33:59,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:33:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 6395 transitions. [2018-10-27 05:33:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-10-27 05:33:59,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:33:59,257 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-27 05:33:59,257 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:33:59,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:33:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1833483425, now seen corresponding path program 1 times [2018-10-27 05:33:59,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:33:59,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:59,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:33:59,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:33:59,259 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:33:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:33:59,785 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-27 05:34:00,567 WARN L179 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 05:34:00,964 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-27 05:34:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 313 proven. 161 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-27 05:34:01,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:01,671 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:34:01,671 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 404 with the following transitions: [2018-10-27 05:34:01,672 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:34:01,676 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:34:01,676 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:34:08,117 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:34:08,118 INFO L272 AbstractInterpreter]: Visited 122 different actions 484 times. Merged at 9 different actions 32 times. Never widened. Found 7 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-27 05:34:08,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:08,125 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:34:08,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:08,125 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:34:08,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:08,133 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:34:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:08,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:34:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-10-27 05:34:08,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:34:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-10-27 05:34:09,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:34:09,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-10-27 05:34:09,274 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:34:09,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 05:34:09,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 05:34:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:34:09,276 INFO L87 Difference]: Start difference. First operand 5316 states and 6395 transitions. Second operand 17 states. [2018-10-27 05:34:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:34:16,784 INFO L93 Difference]: Finished difference Result 12124 states and 15149 transitions. [2018-10-27 05:34:16,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-27 05:34:16,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 403 [2018-10-27 05:34:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:34:16,811 INFO L225 Difference]: With dead ends: 12124 [2018-10-27 05:34:16,811 INFO L226 Difference]: Without dead ends: 5749 [2018-10-27 05:34:16,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 817 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-10-27 05:34:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2018-10-27 05:34:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 5463. [2018-10-27 05:34:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5463 states. [2018-10-27 05:34:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 6128 transitions. [2018-10-27 05:34:16,973 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 6128 transitions. Word has length 403 [2018-10-27 05:34:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:34:16,973 INFO L481 AbstractCegarLoop]: Abstraction has 5463 states and 6128 transitions. [2018-10-27 05:34:16,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 05:34:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 6128 transitions. [2018-10-27 05:34:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-10-27 05:34:16,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:34:16,991 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:34:16,991 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:34:16,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -992715388, now seen corresponding path program 1 times [2018-10-27 05:34:16,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:34:16,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:16,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:16,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:16,993 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:34:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-10-27 05:34:17,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:17,825 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:34:17,826 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 608 with the following transitions: [2018-10-27 05:34:17,826 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:34:17,830 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:34:17,830 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:34:23,421 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:34:23,421 INFO L272 AbstractInterpreter]: Visited 192 different actions 770 times. Merged at 10 different actions 38 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 05:34:23,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:23,441 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:34:23,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:23,441 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:34:23,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:23,452 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:34:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:23,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:34:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 666 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2018-10-27 05:34:23,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:34:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-10-27 05:34:24,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:34:24,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-10-27 05:34:24,432 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:34:24,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 05:34:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 05:34:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-27 05:34:24,433 INFO L87 Difference]: Start difference. First operand 5463 states and 6128 transitions. Second operand 7 states. [2018-10-27 05:34:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:34:29,204 INFO L93 Difference]: Finished difference Result 13581 states and 17118 transitions. [2018-10-27 05:34:29,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 05:34:29,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 607 [2018-10-27 05:34:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:34:29,246 INFO L225 Difference]: With dead ends: 13581 [2018-10-27 05:34:29,247 INFO L226 Difference]: Without dead ends: 8492 [2018-10-27 05:34:29,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1231 GetRequests, 1217 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-10-27 05:34:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8492 states. [2018-10-27 05:34:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8492 to 8256. [2018-10-27 05:34:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8256 states. [2018-10-27 05:34:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 9494 transitions. [2018-10-27 05:34:29,493 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 9494 transitions. Word has length 607 [2018-10-27 05:34:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:34:29,494 INFO L481 AbstractCegarLoop]: Abstraction has 8256 states and 9494 transitions. [2018-10-27 05:34:29,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 05:34:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 9494 transitions. [2018-10-27 05:34:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2018-10-27 05:34:29,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:34:29,523 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:34:29,523 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:34:29,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash 729789365, now seen corresponding path program 1 times [2018-10-27 05:34:29,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:34:29,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:29,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:29,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:29,525 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:34:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 1529 trivial. 0 not checked. [2018-10-27 05:34:30,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:34:30,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:34:30,345 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:34:30,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:34:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:34:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:34:30,347 INFO L87 Difference]: Start difference. First operand 8256 states and 9494 transitions. Second operand 4 states. [2018-10-27 05:34:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:34:32,193 INFO L93 Difference]: Finished difference Result 25831 states and 31492 transitions. [2018-10-27 05:34:32,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:34:32,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 767 [2018-10-27 05:34:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:34:32,241 INFO L225 Difference]: With dead ends: 25831 [2018-10-27 05:34:32,241 INFO L226 Difference]: Without dead ends: 12139 [2018-10-27 05:34:32,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:34:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12139 states. [2018-10-27 05:34:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12139 to 12139. [2018-10-27 05:34:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12139 states. [2018-10-27 05:34:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12139 states to 12139 states and 13893 transitions. [2018-10-27 05:34:32,556 INFO L78 Accepts]: Start accepts. Automaton has 12139 states and 13893 transitions. Word has length 767 [2018-10-27 05:34:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:34:32,558 INFO L481 AbstractCegarLoop]: Abstraction has 12139 states and 13893 transitions. [2018-10-27 05:34:32,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:34:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 12139 states and 13893 transitions. [2018-10-27 05:34:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2018-10-27 05:34:32,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:34:32,576 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:34:32,576 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:34:32,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1700300321, now seen corresponding path program 1 times [2018-10-27 05:34:32,577 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:34:32,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:32,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:32,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:32,578 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:34:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 675 proven. 2 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-10-27 05:34:34,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:34,170 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:34:34,170 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 838 with the following transitions: [2018-10-27 05:34:34,171 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:34:34,175 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:34:34,175 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:34:39,713 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:34:39,714 INFO L272 AbstractInterpreter]: Visited 193 different actions 776 times. Merged at 10 different actions 40 times. Widened at 1 different actions 1 times. Found 11 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 05:34:39,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:39,723 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:34:39,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:39,723 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:34:39,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:39,731 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:34:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:39,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:34:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 1164 proven. 2 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2018-10-27 05:34:40,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:34:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 562 proven. 144 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2018-10-27 05:34:41,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:34:41,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-10-27 05:34:41,192 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:34:41,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:34:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:34:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-10-27 05:34:41,195 INFO L87 Difference]: Start difference. First operand 12139 states and 13893 transitions. Second operand 10 states. [2018-10-27 05:34:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:34:47,145 INFO L93 Difference]: Finished difference Result 28294 states and 33874 transitions. [2018-10-27 05:34:47,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-27 05:34:47,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 837 [2018-10-27 05:34:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:34:47,203 INFO L225 Difference]: With dead ends: 28294 [2018-10-27 05:34:47,203 INFO L226 Difference]: Without dead ends: 16529 [2018-10-27 05:34:47,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1756 GetRequests, 1707 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=450, Invalid=1902, Unknown=0, NotChecked=0, Total=2352 [2018-10-27 05:34:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16529 states. [2018-10-27 05:34:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16529 to 15995. [2018-10-27 05:34:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15995 states. [2018-10-27 05:34:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15995 states to 15995 states and 17751 transitions. [2018-10-27 05:34:47,552 INFO L78 Accepts]: Start accepts. Automaton has 15995 states and 17751 transitions. Word has length 837 [2018-10-27 05:34:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:34:47,553 INFO L481 AbstractCegarLoop]: Abstraction has 15995 states and 17751 transitions. [2018-10-27 05:34:47,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:34:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 15995 states and 17751 transitions. [2018-10-27 05:34:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2018-10-27 05:34:47,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:34:47,583 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 05:34:47,584 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:34:47,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1292338358, now seen corresponding path program 1 times [2018-10-27 05:34:47,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:34:47,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:47,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:47,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:34:47,585 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:34:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:48,486 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 05:34:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 450 proven. 1418 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2018-10-27 05:34:50,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:50,882 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:34:50,883 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1013 with the following transitions: [2018-10-27 05:34:50,883 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:34:50,886 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:34:50,886 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:34:56,372 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:34:56,372 INFO L272 AbstractInterpreter]: Visited 195 different actions 785 times. Merged at 11 different actions 41 times. Widened at 1 different actions 1 times. Found 14 fixpoints after 6 different actions. Largest state had 24 variables. [2018-10-27 05:34:56,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:34:56,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:34:56,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:34:56,373 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:34:56,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:34:56,382 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:34:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:34:56,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:34:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 1992 proven. 2 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2018-10-27 05:34:57,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:34:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 451 proven. 470 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-27 05:34:58,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:34:58,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-10-27 05:34:58,341 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:34:58,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-27 05:34:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-27 05:34:58,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-10-27 05:34:58,343 INFO L87 Difference]: Start difference. First operand 15995 states and 17751 transitions. Second operand 18 states. [2018-10-27 05:35:01,202 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2018-10-27 05:35:06,430 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-10-27 05:35:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:35:08,582 INFO L93 Difference]: Finished difference Result 31580 states and 35128 transitions. [2018-10-27 05:35:08,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-27 05:35:08,583 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1012 [2018-10-27 05:35:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:35:08,622 INFO L225 Difference]: With dead ends: 31580 [2018-10-27 05:35:08,623 INFO L226 Difference]: Without dead ends: 15959 [2018-10-27 05:35:08,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2113 GetRequests, 2050 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2018-10-27 05:35:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15959 states. [2018-10-27 05:35:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15959 to 15421. [2018-10-27 05:35:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15421 states. [2018-10-27 05:35:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15421 states to 15421 states and 16632 transitions. [2018-10-27 05:35:08,893 INFO L78 Accepts]: Start accepts. Automaton has 15421 states and 16632 transitions. Word has length 1012 [2018-10-27 05:35:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:35:08,893 INFO L481 AbstractCegarLoop]: Abstraction has 15421 states and 16632 transitions. [2018-10-27 05:35:08,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-27 05:35:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 15421 states and 16632 transitions. [2018-10-27 05:35:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2018-10-27 05:35:09,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:35:09,061 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 05:35:09,062 INFO L424 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:35:09,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:35:09,063 INFO L82 PathProgramCache]: Analyzing trace with hash 517907325, now seen corresponding path program 1 times [2018-10-27 05:35:09,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:35:09,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:35:09,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:35:09,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:35:09,064 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:35:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:35:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3538 backedges. 1258 proven. 223 refuted. 0 times theorem prover too weak. 2057 trivial. 0 not checked. [2018-10-27 05:35:10,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:35:10,398 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:35:10,398 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1095 with the following transitions: [2018-10-27 05:35:10,399 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [542], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:35:10,402 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:35:10,402 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:35:15,860 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:35:15,860 INFO L272 AbstractInterpreter]: Visited 196 different actions 789 times. Merged at 12 different actions 41 times. Widened at 1 different actions 1 times. Found 16 fixpoints after 7 different actions. Largest state had 24 variables. [2018-10-27 05:35:15,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:35:15,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:35:15,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:35:15,866 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:35:15,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:35:15,875 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:35:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:35:16,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:35:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3538 backedges. 2084 proven. 6 refuted. 0 times theorem prover too weak. 1448 trivial. 0 not checked. [2018-10-27 05:35:16,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:35:17,241 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-27 05:35:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3538 backedges. 1258 proven. 296 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2018-10-27 05:35:18,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:35:18,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-10-27 05:35:18,158 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:35:18,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:35:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:35:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-27 05:35:18,160 INFO L87 Difference]: Start difference. First operand 15421 states and 16632 transitions. Second operand 9 states. [2018-10-27 05:35:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:35:21,968 INFO L93 Difference]: Finished difference Result 34399 states and 37442 transitions. [2018-10-27 05:35:21,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 05:35:21,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1094 [2018-10-27 05:35:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:35:22,009 INFO L225 Difference]: With dead ends: 34399 [2018-10-27 05:35:22,010 INFO L226 Difference]: Without dead ends: 19352 [2018-10-27 05:35:22,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2205 GetRequests, 2186 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-10-27 05:35:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19352 states. [2018-10-27 05:35:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19352 to 18432. [2018-10-27 05:35:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18432 states. [2018-10-27 05:35:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18432 states to 18432 states and 20132 transitions. [2018-10-27 05:35:22,322 INFO L78 Accepts]: Start accepts. Automaton has 18432 states and 20132 transitions. Word has length 1094 [2018-10-27 05:35:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:35:22,323 INFO L481 AbstractCegarLoop]: Abstraction has 18432 states and 20132 transitions. [2018-10-27 05:35:22,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:35:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18432 states and 20132 transitions. [2018-10-27 05:35:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2018-10-27 05:35:22,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:35:22,352 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 05:35:22,353 INFO L424 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:35:22,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:35:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1485864680, now seen corresponding path program 1 times [2018-10-27 05:35:22,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:35:22,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:35:22,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:35:22,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:35:22,355 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:35:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:35:23,611 WARN L179 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 05:35:24,099 WARN L179 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-27 05:35:24,557 WARN L179 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 30 Received shutdown request... [2018-10-27 05:35:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4707 backedges. 942 proven. 944 refuted. 0 times theorem prover too weak. 2821 trivial. 0 not checked. [2018-10-27 05:35:26,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:35:26,405 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:35:26,405 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1247 with the following transitions: [2018-10-27 05:35:26,406 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [542], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [686], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:35:26,408 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:35:26,409 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:35:26,409 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-27 05:35:26,410 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-27 05:35:26,410 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:35:26,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:35:26,410 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:35:26,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:35:26,419 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:35:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:35:26,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:35:26,762 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-27 05:35:26,963 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:35:26,963 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 05:35:26,968 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 05:35:26,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 05:35:26 BoogieIcfgContainer [2018-10-27 05:35:26,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 05:35:26,971 INFO L168 Benchmark]: Toolchain (without parser) took 227451.52 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -285.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-27 05:35:26,972 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 05:35:26,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 840.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2018-10-27 05:35:26,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 266.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 779.6 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -867.3 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-27 05:35:26,975 INFO L168 Benchmark]: Boogie Preprocessor took 127.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2018-10-27 05:35:26,977 INFO L168 Benchmark]: RCFGBuilder took 3563.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 135.7 MB). Peak memory consumption was 135.7 MB. Max. memory is 7.1 GB. [2018-10-27 05:35:26,978 INFO L168 Benchmark]: TraceAbstraction took 222646.17 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 387.3 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-27 05:35:26,987 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 840.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 266.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 779.6 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -867.3 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3563.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 135.7 MB). Peak memory consumption was 135.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222646.17 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 387.3 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 22]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 22). Cancelled while BasicCegarLoop was analyzing trace of length 1247 with TraceHistMax 11,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 222.5s OverallTime, 16 OverallIterations, 11 TraceHistogramMax, 152.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2541 SDtfs, 20789 SDslu, 2972 SDs, 0 SdLazy, 34101 SolverSat, 4773 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 113.6s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 9927 GetRequests, 9641 SyntacticMatches, 10 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18432occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 35.3s AbstIntTime, 11 AbstIntIterations, 4 AbstIntStrong, 0.9964628139668787 AbsIntWeakeningRatio, 0.12249443207126949 AbsIntAvgWeakeningVarsNumRemoved, 15.775055679287306 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 2568 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 17.3s InterpolantComputationTime, 10996 NumberOfCodeBlocks, 10996 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 15301 ConstructedInterpolants, 0 QuantifiedInterpolants, 35822521 SizeOfPredicates, 11 NumberOfNonLiveVariables, 6333 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 30241/33577 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown