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_label29_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:28:05,528 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:28:05,530 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:28:05,546 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:28:05,546 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:28:05,547 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:28:05,549 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:28:05,552 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:28:05,554 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:28:05,555 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:28:05,565 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:28:05,565 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:28:05,566 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:28:05,569 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:28:05,570 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:28:05,571 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:28:05,572 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:28:05,575 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:28:05,580 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:28:05,582 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:28:05,586 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:28:05,587 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:28:05,590 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 05:28:05,590 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 05:28:05,590 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 05:28:05,592 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 05:28:05,594 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 05:28:05,595 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 05:28:05,595 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 05:28:05,596 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 05:28:05,596 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 05:28:05,597 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 05:28:05,601 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 05:28:05,631 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:28:05,632 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:28:05,636 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:28:05,637 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:28:05,637 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:28:05,637 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:28:05,637 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 05:28:05,637 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:28:05,638 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 05:28:05,638 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:28:05,638 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 05:28:05,638 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:28:05,638 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:28:05,639 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:28:05,640 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:28:05,640 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:28:05,640 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:28:05,640 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:28:05,640 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:28:05,641 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:28:05,642 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:28:05,642 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:28:05,642 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:28:05,642 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:28:05,643 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:28:05,643 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:28:05,643 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:28:05,643 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:28:05,643 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:28:05,643 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:28:05,644 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:28:05,644 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:28:05,644 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:28:05,644 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:28:05,644 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 05:28:05,645 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 05:28:05,721 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:28:05,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:28:05,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:28:05,742 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:28:05,742 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:28:05,744 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label29_false-unreach-call_false-termination.c [2018-10-27 05:28:05,803 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/123093f87/c8140396e8994952932876aba417d9bf/FLAGf44a90745 [2018-10-27 05:28:06,404 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:28:06,405 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label29_false-unreach-call_false-termination.c [2018-10-27 05:28:06,427 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/123093f87/c8140396e8994952932876aba417d9bf/FLAGf44a90745 [2018-10-27 05:28:06,455 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/123093f87/c8140396e8994952932876aba417d9bf [2018-10-27 05:28:06,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:28:06,471 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 05:28:06,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:28:06,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:28:06,478 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:28:06,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:28:06" (1/1) ... [2018-10-27 05:28:06,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180ddc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:06, skipping insertion in model container [2018-10-27 05:28:06,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:28:06" (1/1) ... [2018-10-27 05:28:06,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:28:06,578 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:28:07,116 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:28:07,121 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:28:07,291 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:28:07,310 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:28:07,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07 WrapperNode [2018-10-27 05:28:07,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:28:07,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:28:07,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:28:07,312 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:28:07,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:28:07,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:28:07,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:28:07,546 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:28:07,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (1/1) ... [2018-10-27 05:28:07,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:28:07,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:28:07,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:28:07,654 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:28:07,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (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 05:28:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:28:07,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:28:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 05:28:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 05:28:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:28:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:28:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:28:07,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:28:11,826 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:28:11,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:28:11 BoogieIcfgContainer [2018-10-27 05:28:11,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:28:11,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:28:11,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:28:11,838 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:28:11,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:28:06" (1/3) ... [2018-10-27 05:28:11,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f56f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:28:11, skipping insertion in model container [2018-10-27 05:28:11,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:28:07" (2/3) ... [2018-10-27 05:28:11,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f56f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:28:11, skipping insertion in model container [2018-10-27 05:28:11,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:28:11" (3/3) ... [2018-10-27 05:28:11,843 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label29_false-unreach-call_false-termination.c [2018-10-27 05:28:11,854 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:28:11,869 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 05:28:11,889 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 05:28:11,944 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:28:11,944 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:28:11,944 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:28:11,944 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:28:11,945 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:28:11,945 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:28:11,945 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:28:11,946 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:28:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 05:28:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-27 05:28:12,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:12,005 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:28:12,008 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:12,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1296810127, now seen corresponding path program 1 times [2018-10-27 05:28:12,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:12,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:12,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:12,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:12,076 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:12,472 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 05:28:12,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:28:12,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:28:12,479 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:12,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:28:12,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:28:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:28:12,528 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-10-27 05:28:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:28:15,707 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-10-27 05:28:15,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:28:15,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-10-27 05:28:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:28:15,734 INFO L225 Difference]: With dead ends: 894 [2018-10-27 05:28:15,734 INFO L226 Difference]: Without dead ends: 633 [2018-10-27 05:28:15,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:28:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-10-27 05:28:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-10-27 05:28:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-10-27 05:28:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 962 transitions. [2018-10-27 05:28:15,849 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 962 transitions. Word has length 23 [2018-10-27 05:28:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:28:15,850 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 962 transitions. [2018-10-27 05:28:15,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:28:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 962 transitions. [2018-10-27 05:28:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-27 05:28:15,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:15,859 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:28:15,859 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:15,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1722550117, now seen corresponding path program 1 times [2018-10-27 05:28:15,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:15,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:15,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:15,862 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:28:16,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:28:16,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:28:16,216 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:16,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:28:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:28:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:28:16,219 INFO L87 Difference]: Start difference. First operand 633 states and 962 transitions. Second operand 4 states. [2018-10-27 05:28:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:28:19,408 INFO L93 Difference]: Finished difference Result 2170 states and 3490 transitions. [2018-10-27 05:28:19,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:28:19,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2018-10-27 05:28:19,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:28:19,423 INFO L225 Difference]: With dead ends: 2170 [2018-10-27 05:28:19,423 INFO L226 Difference]: Without dead ends: 1543 [2018-10-27 05:28:19,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:28:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2018-10-27 05:28:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2018-10-27 05:28:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2018-10-27 05:28:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2271 transitions. [2018-10-27 05:28:19,529 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2271 transitions. Word has length 136 [2018-10-27 05:28:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:28:19,530 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2271 transitions. [2018-10-27 05:28:19,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:28:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2271 transitions. [2018-10-27 05:28:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-27 05:28:19,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:19,550 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:28:19,550 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:19,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:19,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1034192261, now seen corresponding path program 1 times [2018-10-27 05:28:19,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:19,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:19,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:19,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:19,555 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:20,204 WARN L179 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-27 05:28:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 32 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 05:28:20,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:28:20,536 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:28:20,537 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-10-27 05:28:20,539 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:28:20,598 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:28:20,598 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:28:24,980 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:28:24,982 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 05:28:25,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:25,011 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:28:27,656 INFO L227 lantSequenceWeakener]: Weakened 202 states. On average, predicates are now at 77.43% of their original sizes. [2018-10-27 05:28:27,656 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:28:27,792 INFO L415 sIntCurrentIteration]: We unified 210 AI predicates to 210 [2018-10-27 05:28:27,792 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:28:27,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:28:27,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2018-10-27 05:28:27,794 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:27,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:28:27,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:28:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:28:27,797 INFO L87 Difference]: Start difference. First operand 1543 states and 2271 transitions. Second operand 6 states. [2018-10-27 05:28:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:28:48,754 INFO L93 Difference]: Finished difference Result 3265 states and 4776 transitions. [2018-10-27 05:28:48,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:28:48,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2018-10-27 05:28:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:28:48,765 INFO L225 Difference]: With dead ends: 3265 [2018-10-27 05:28:48,765 INFO L226 Difference]: Without dead ends: 1728 [2018-10-27 05:28:48,771 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 211 GetRequests, 206 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 05:28:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2018-10-27 05:28:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2018-10-27 05:28:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-10-27 05:28:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2461 transitions. [2018-10-27 05:28:48,820 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2461 transitions. Word has length 211 [2018-10-27 05:28:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:28:48,821 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states and 2461 transitions. [2018-10-27 05:28:48,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:28:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2461 transitions. [2018-10-27 05:28:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-10-27 05:28:48,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:48,829 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:28:48,829 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:48,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:48,830 INFO L82 PathProgramCache]: Analyzing trace with hash 931255223, now seen corresponding path program 1 times [2018-10-27 05:28:48,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:48,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:48,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:48,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:48,831 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:49,367 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 05:28:49,559 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 05:28:49,760 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 05:28:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 136 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 05:28:50,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:28:50,290 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:28:50,290 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 297 with the following transitions: [2018-10-27 05:28:50,291 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:28:50,296 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:28:50,296 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:28:54,111 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:28:54,112 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 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 05:28:54,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:54,123 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:28:56,298 INFO L227 lantSequenceWeakener]: Weakened 293 states. On average, predicates are now at 77.47% of their original sizes. [2018-10-27 05:28:56,298 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:28:57,000 INFO L415 sIntCurrentIteration]: We unified 295 AI predicates to 295 [2018-10-27 05:28:57,000 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:28:57,001 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:28:57,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-10-27 05:28:57,001 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:57,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:28:57,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:28:57,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:28:57,003 INFO L87 Difference]: Start difference. First operand 1726 states and 2461 transitions. Second operand 10 states. [2018-10-27 05:29:52,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:29:52,886 INFO L93 Difference]: Finished difference Result 4011 states and 5680 transitions. [2018-10-27 05:29:52,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 05:29:52,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 296 [2018-10-27 05:29:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:29:52,900 INFO L225 Difference]: With dead ends: 4011 [2018-10-27 05:29:52,900 INFO L226 Difference]: Without dead ends: 2474 [2018-10-27 05:29:52,906 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 304 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:29:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2018-10-27 05:29:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2471. [2018-10-27 05:29:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2018-10-27 05:29:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3294 transitions. [2018-10-27 05:29:52,966 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3294 transitions. Word has length 296 [2018-10-27 05:29:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:29:52,967 INFO L481 AbstractCegarLoop]: Abstraction has 2471 states and 3294 transitions. [2018-10-27 05:29:52,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:29:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3294 transitions. [2018-10-27 05:29:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-10-27 05:29:52,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:29:52,977 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:29:52,977 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:29:52,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:29:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1791037874, now seen corresponding path program 1 times [2018-10-27 05:29:52,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:29:52,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:29:52,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:29:52,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:29:52,979 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:29:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:29:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-10-27 05:29:53,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:29:53,302 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:29:53,303 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 344 with the following transitions: [2018-10-27 05:29:53,304 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:29:53,309 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:29:53,309 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:29:53,451 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:29:53,451 INFO L272 AbstractInterpreter]: Visited 143 different actions 280 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 05:29:53,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:29:53,489 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:29:53,788 INFO L227 lantSequenceWeakener]: Weakened 340 states. On average, predicates are now at 77.44% of their original sizes. [2018-10-27 05:29:53,788 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:29:54,001 INFO L415 sIntCurrentIteration]: We unified 342 AI predicates to 342 [2018-10-27 05:29:54,001 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:29:54,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:29:54,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-10-27 05:29:54,002 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:29:54,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:29:54,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:29:54,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:29:54,003 INFO L87 Difference]: Start difference. First operand 2471 states and 3294 transitions. Second operand 10 states. [2018-10-27 05:30:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:30:07,661 INFO L93 Difference]: Finished difference Result 4941 states and 6630 transitions. [2018-10-27 05:30:07,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 05:30:07,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 343 [2018-10-27 05:30:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:30:07,673 INFO L225 Difference]: With dead ends: 4941 [2018-10-27 05:30:07,674 INFO L226 Difference]: Without dead ends: 2659 [2018-10-27 05:30:07,681 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 350 GetRequests, 334 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 05:30:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2018-10-27 05:30:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2656. [2018-10-27 05:30:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2656 states. [2018-10-27 05:30:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3493 transitions. [2018-10-27 05:30:07,753 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3493 transitions. Word has length 343 [2018-10-27 05:30:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:30:07,754 INFO L481 AbstractCegarLoop]: Abstraction has 2656 states and 3493 transitions. [2018-10-27 05:30:07,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:30:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3493 transitions. [2018-10-27 05:30:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-27 05:30:07,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:30:07,771 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:30:07,771 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:30:07,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:07,778 INFO L82 PathProgramCache]: Analyzing trace with hash -296131329, now seen corresponding path program 1 times [2018-10-27 05:30:07,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:30:07,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:07,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:30:07,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:07,779 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:30:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:30:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 212 proven. 257 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-27 05:30:08,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:30:08,244 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:30:08,244 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 424 with the following transitions: [2018-10-27 05:30:08,244 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:30:08,248 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:30:08,248 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:30:13,506 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:30:13,506 INFO L272 AbstractInterpreter]: Visited 121 different actions 362 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 05:30:13,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:13,516 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:30:14,567 INFO L227 lantSequenceWeakener]: Weakened 420 states. On average, predicates are now at 80.1% of their original sizes. [2018-10-27 05:30:14,567 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:30:14,671 INFO L415 sIntCurrentIteration]: We unified 422 AI predicates to 422 [2018-10-27 05:30:14,671 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:30:14,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:30:14,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-10-27 05:30:14,672 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:30:14,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:30:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:30:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-27 05:30:14,673 INFO L87 Difference]: Start difference. First operand 2656 states and 3493 transitions. Second operand 9 states. [2018-10-27 05:30:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:30:31,122 INFO L93 Difference]: Finished difference Result 5623 states and 7744 transitions. [2018-10-27 05:30:31,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 05:30:31,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 423 [2018-10-27 05:30:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:30:31,137 INFO L225 Difference]: With dead ends: 5623 [2018-10-27 05:30:31,138 INFO L226 Difference]: Without dead ends: 3341 [2018-10-27 05:30:31,146 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 429 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:30:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2018-10-27 05:30:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3311. [2018-10-27 05:30:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3311 states. [2018-10-27 05:30:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 4296 transitions. [2018-10-27 05:30:31,222 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 4296 transitions. Word has length 423 [2018-10-27 05:30:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:30:31,223 INFO L481 AbstractCegarLoop]: Abstraction has 3311 states and 4296 transitions. [2018-10-27 05:30:31,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:30:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 4296 transitions. [2018-10-27 05:30:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2018-10-27 05:30:31,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:30:31,239 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:30:31,239 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:30:31,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1728773980, now seen corresponding path program 1 times [2018-10-27 05:30:31,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:30:31,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:31,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:30:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:31,241 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:30:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:30:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 178 proven. 253 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2018-10-27 05:30:31,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:30:31,684 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:30:31,684 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 482 with the following transitions: [2018-10-27 05:30:31,684 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:30:31,687 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:30:31,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:30:38,135 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:30:38,135 INFO L272 AbstractInterpreter]: Visited 125 different actions 505 times. Merged at 10 different actions 41 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-27 05:30:38,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:38,145 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:30:38,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:30:38,145 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 05:30:38,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:30:38,157 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:30:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:30:38,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:30:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 606 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-27 05:30:38,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:30:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 178 proven. 253 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2018-10-27 05:30:39,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:30:39,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 05:30:39,704 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:30:39,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:30:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:30:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:30:39,706 INFO L87 Difference]: Start difference. First operand 3311 states and 4296 transitions. Second operand 9 states. [2018-10-27 05:30:41,041 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 05:30:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:30:49,181 INFO L93 Difference]: Finished difference Result 8977 states and 12987 transitions. [2018-10-27 05:30:49,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-27 05:30:49,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 481 [2018-10-27 05:30:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:30:49,206 INFO L225 Difference]: With dead ends: 8977 [2018-10-27 05:30:49,207 INFO L226 Difference]: Without dead ends: 5671 [2018-10-27 05:30:49,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 979 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:30:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5671 states. [2018-10-27 05:30:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5671 to 5642. [2018-10-27 05:30:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5642 states. [2018-10-27 05:30:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 7258 transitions. [2018-10-27 05:30:49,350 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 7258 transitions. Word has length 481 [2018-10-27 05:30:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:30:49,350 INFO L481 AbstractCegarLoop]: Abstraction has 5642 states and 7258 transitions. [2018-10-27 05:30:49,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:30:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 7258 transitions. [2018-10-27 05:30:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2018-10-27 05:30:49,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:30:49,367 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:30:49,367 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:30:49,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:49,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1495468967, now seen corresponding path program 1 times [2018-10-27 05:30:49,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:30:49,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:49,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:30:49,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:49,369 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:30:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:30:50,763 WARN L179 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 05:30:51,005 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-27 05:30:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 400 proven. 387 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-10-27 05:30:51,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:30:51,763 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:30:51,763 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 507 with the following transitions: [2018-10-27 05:30:51,763 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [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], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:30:51,766 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:30:51,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:31:02,267 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:31:02,268 INFO L272 AbstractInterpreter]: Visited 125 different actions 496 times. Merged at 9 different actions 32 times. Never widened. Found 8 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 05:31:02,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:02,277 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:31:02,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:02,277 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 05:31:02,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:02,348 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:31:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:02,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:31:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 714 proven. 2 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-10-27 05:31:02,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:31:03,211 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-27 05:31:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 249 proven. 144 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-10-27 05:31:03,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:31:03,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-10-27 05:31:03,660 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:31:03,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 05:31:03,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 05:31:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:31:03,662 INFO L87 Difference]: Start difference. First operand 5642 states and 7258 transitions. Second operand 17 states. [2018-10-27 05:31:12,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:31:12,730 INFO L93 Difference]: Finished difference Result 16067 states and 22567 transitions. [2018-10-27 05:31:12,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-27 05:31:12,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 506 [2018-10-27 05:31:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:31:12,784 INFO L225 Difference]: With dead ends: 16067 [2018-10-27 05:31:12,785 INFO L226 Difference]: Without dead ends: 9729 [2018-10-27 05:31:12,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=652, Invalid=2770, Unknown=0, NotChecked=0, Total=3422 [2018-10-27 05:31:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9729 states. [2018-10-27 05:31:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 9507. [2018-10-27 05:31:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9507 states. [2018-10-27 05:31:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9507 states to 9507 states and 11011 transitions. [2018-10-27 05:31:13,087 INFO L78 Accepts]: Start accepts. Automaton has 9507 states and 11011 transitions. Word has length 506 [2018-10-27 05:31:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:31:13,088 INFO L481 AbstractCegarLoop]: Abstraction has 9507 states and 11011 transitions. [2018-10-27 05:31:13,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 05:31:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9507 states and 11011 transitions. [2018-10-27 05:31:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2018-10-27 05:31:13,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:31:13,101 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:31:13,101 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:31:13,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:13,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1644735688, now seen corresponding path program 1 times [2018-10-27 05:31:13,102 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:31:13,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:13,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:13,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:13,104 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:31:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:13,898 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 05:31:14,094 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 05:31:14,322 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 05:31:14,671 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-27 05:31:15,174 WARN L179 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-10-27 05:31:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 468 proven. 767 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-10-27 05:31:16,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:16,684 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:31:16,685 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 745 with the following transitions: [2018-10-27 05:31:16,685 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [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 05:31:16,689 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:31:16,689 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:31:22,133 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:31:22,133 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 05:31:22,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:22,140 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:31:22,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:22,140 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 05:31:22,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:22,150 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:31:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:22,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:31:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 927 proven. 2 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2018-10-27 05:31:23,234 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:31:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 589 proven. 74 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-10-27 05:31:23,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:31:23,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 20 [2018-10-27 05:31:23,928 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:31:23,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-27 05:31:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-27 05:31:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2018-10-27 05:31:23,930 INFO L87 Difference]: Start difference. First operand 9507 states and 11011 transitions. Second operand 18 states. [2018-10-27 05:31:28,157 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2018-10-27 05:31:31,379 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2018-10-27 05:31:33,307 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2018-10-27 05:31:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:31:34,591 INFO L93 Difference]: Finished difference Result 21265 states and 25603 transitions. [2018-10-27 05:31:34,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-27 05:31:34,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 744 [2018-10-27 05:31:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:31:34,641 INFO L225 Difference]: With dead ends: 21265 [2018-10-27 05:31:34,641 INFO L226 Difference]: Without dead ends: 11947 [2018-10-27 05:31:34,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1591 GetRequests, 1510 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=996, Invalid=4116, Unknown=0, NotChecked=0, Total=5112 [2018-10-27 05:31:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11947 states. [2018-10-27 05:31:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11947 to 11649. [2018-10-27 05:31:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11649 states. [2018-10-27 05:31:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11649 states to 11649 states and 13515 transitions. [2018-10-27 05:31:34,913 INFO L78 Accepts]: Start accepts. Automaton has 11649 states and 13515 transitions. Word has length 744 [2018-10-27 05:31:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:31:34,914 INFO L481 AbstractCegarLoop]: Abstraction has 11649 states and 13515 transitions. [2018-10-27 05:31:34,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-27 05:31:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11649 states and 13515 transitions. [2018-10-27 05:31:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2018-10-27 05:31:34,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:31:34,926 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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 05:31:34,927 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:31:34,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:34,927 INFO L82 PathProgramCache]: Analyzing trace with hash -354100163, now seen corresponding path program 1 times [2018-10-27 05:31:34,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:31:34,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:34,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:34,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:34,929 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:31:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 629 proven. 677 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-10-27 05:31:37,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:37,530 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:31:37,530 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 778 with the following transitions: [2018-10-27 05:31:37,530 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [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], [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 05:31:37,533 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:31:37,533 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:31:43,080 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:31:43,081 INFO L272 AbstractInterpreter]: Visited 193 different actions 774 times. Merged at 10 different actions 38 times. Widened at 1 different actions 1 times. Found 11 fixpoints after 5 different actions. Largest state had 24 variables. [2018-10-27 05:31:43,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:43,090 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:31:43,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:43,090 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 05:31:43,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:43,098 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:31:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:43,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:31:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 960 proven. 2 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2018-10-27 05:31:44,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:31:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 622 proven. 74 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2018-10-27 05:31:44,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:31:44,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 22 [2018-10-27 05:31:44,961 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:31:44,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 05:31:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 05:31:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-10-27 05:31:44,963 INFO L87 Difference]: Start difference. First operand 11649 states and 13515 transitions. Second operand 20 states. [2018-10-27 05:31:49,324 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2018-10-27 05:31:55,854 WARN L179 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-10-27 05:31:57,036 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 Received shutdown request... [2018-10-27 05:31:58,195 WARN L187 SmtUtils]: Removed 5 from assertion stack [2018-10-27 05:31:58,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-27 05:31:58,196 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 05:31:58,202 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 05:31:58,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 05:31:58 BoogieIcfgContainer [2018-10-27 05:31:58,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 05:31:58,203 INFO L168 Benchmark]: Toolchain (without parser) took 231733.54 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-27 05:31:58,204 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 05:31:58,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 837.36 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:58,206 INFO L168 Benchmark]: Boogie Procedure Inliner took 233.84 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 719.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -807.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:58,211 INFO L168 Benchmark]: Boogie Preprocessor took 107.73 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:58,212 INFO L168 Benchmark]: RCFGBuilder took 4178.79 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 133.8 MB). Peak memory consumption was 133.8 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:58,214 INFO L168 Benchmark]: TraceAbstraction took 226368.64 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.8 GB in the end (delta: -739.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-27 05:31:58,223 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 837.36 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 233.84 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 719.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -807.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.73 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4178.79 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 133.8 MB). Peak memory consumption was 133.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 226368.64 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.8 GB in the end (delta: -739.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 52). Cancelled while BasicCegarLoop was constructing difference of abstraction (11649states) and FLOYD_HOARE automaton (currently 85 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 226.2s OverallTime, 10 OverallIterations, 7 TraceHistogramMax, 156.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1656 SDtfs, 30933 SDslu, 2705 SDs, 0 SdLazy, 28383 SolverSat, 5289 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 115.3s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 6721 GetRequests, 6389 SyntacticMatches, 19 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6547 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11649occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 41.7s AbstIntTime, 8 AbstIntIterations, 4 AbstIntStrong, 0.9969088550965313 AbsIntWeakeningRatio, 0.1008668242710796 AbsIntAvgWeakeningVarsNumRemoved, 15.95665878644602 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 587 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 14.1s InterpolantComputationTime, 6448 NumberOfCodeBlocks, 6448 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 8938 ConstructedInterpolants, 0 QuantifiedInterpolants, 28260970 SizeOfPredicates, 10 NumberOfNonLiveVariables, 3768 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 13376/16484 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown