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/Problem11_label47_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 01:33:22,689 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 01:33:22,691 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 01:33:22,703 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 01:33:22,703 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 01:33:22,704 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 01:33:22,705 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 01:33:22,707 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 01:33:22,709 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 01:33:22,709 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 01:33:22,710 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 01:33:22,711 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 01:33:22,712 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 01:33:22,713 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 01:33:22,714 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 01:33:22,714 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 01:33:22,715 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 01:33:22,717 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 01:33:22,719 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 01:33:22,721 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 01:33:22,722 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 01:33:22,724 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 01:33:22,726 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 01:33:22,740 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-25 01:33:22,761 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 01:33:22,761 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 01:33:22,762 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 01:33:22,762 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 01:33:22,762 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 01:33:22,763 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 01:33:22,763 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 01:33:22,763 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 01:33:22,763 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 01:33:22,763 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 01:33:22,763 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 01:33:22,764 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 01:33:22,764 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 01:33:22,764 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 01:33:22,765 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 01:33:22,765 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 01:33:22,765 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 01:33:22,765 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 01:33:22,766 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 01:33:22,766 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 01:33:22,766 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 01:33:22,766 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 01:33:22,766 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 01:33:22,767 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 01:33:22,767 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 01:33:22,767 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 01:33:22,767 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 01:33:22,767 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 01:33:22,768 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 01:33:22,768 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 01:33:22,768 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 01:33:22,768 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 01:33:22,768 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 01:33:22,769 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 01:33:22,769 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 01:33:22,769 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 01:33:22,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 01:33:22,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 01:33:22,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 01:33:22,842 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 01:33:22,842 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 01:33:22,843 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label47_true-unreach-call.c [2018-10-25 01:33:22,906 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a43d6df87/a9a328f7e5954479a70997e428870585/FLAG806c46d4b [2018-10-25 01:33:23,556 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 01:33:23,560 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label47_true-unreach-call.c [2018-10-25 01:33:23,586 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a43d6df87/a9a328f7e5954479a70997e428870585/FLAG806c46d4b [2018-10-25 01:33:23,601 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a43d6df87/a9a328f7e5954479a70997e428870585 [2018-10-25 01:33:23,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 01:33:23,614 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 01:33:23,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 01:33:23,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 01:33:23,619 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 01:33:23,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:33:23" (1/1) ... [2018-10-25 01:33:23,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d53142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:23, skipping insertion in model container [2018-10-25 01:33:23,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:33:23" (1/1) ... [2018-10-25 01:33:23,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 01:33:23,708 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 01:33:24,330 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:33:24,337 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 01:33:24,516 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:33:24,537 INFO L193 MainTranslator]: Completed translation [2018-10-25 01:33:24,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24 WrapperNode [2018-10-25 01:33:24,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 01:33:24,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 01:33:24,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 01:33:24,539 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 01:33:24,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 01:33:24,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 01:33:24,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 01:33:24,813 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 01:33:24,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... [2018-10-25 01:33:24,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 01:33:24,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 01:33:24,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 01:33:24,949 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 01:33:24,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 01:33:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 01:33:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 01:33:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 01:33:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 01:33:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 01:33:25,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 01:33:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 01:33:25,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 01:33:29,747 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 01:33:29,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:33:29 BoogieIcfgContainer [2018-10-25 01:33:29,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 01:33:29,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 01:33:29,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 01:33:29,755 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 01:33:29,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 01:33:23" (1/3) ... [2018-10-25 01:33:29,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103be2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:33:29, skipping insertion in model container [2018-10-25 01:33:29,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:33:24" (2/3) ... [2018-10-25 01:33:29,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103be2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:33:29, skipping insertion in model container [2018-10-25 01:33:29,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:33:29" (3/3) ... [2018-10-25 01:33:29,759 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label47_true-unreach-call.c [2018-10-25 01:33:29,770 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 01:33:29,781 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 01:33:29,801 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 01:33:29,836 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 01:33:29,837 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 01:33:29,837 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 01:33:29,837 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 01:33:29,837 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 01:33:29,837 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 01:33:29,838 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 01:33:29,838 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 01:33:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-10-25 01:33:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-25 01:33:29,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:33:29,877 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:33:29,879 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:33:29,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:33:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1591725132, now seen corresponding path program 1 times [2018-10-25 01:33:29,888 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:33:29,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:29,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:33:29,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:29,945 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:33:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:33:30,344 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 01:33:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:33:30,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:33:30,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 01:33:30,462 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:33:30,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:33:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:33:30,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 01:33:30,492 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-10-25 01:33:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:33:32,791 INFO L93 Difference]: Finished difference Result 790 states and 1382 transitions. [2018-10-25 01:33:32,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:33:32,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-10-25 01:33:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:33:32,815 INFO L225 Difference]: With dead ends: 790 [2018-10-25 01:33:32,815 INFO L226 Difference]: Without dead ends: 495 [2018-10-25 01:33:32,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 01:33:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-10-25 01:33:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 488. [2018-10-25 01:33:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-10-25 01:33:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 849 transitions. [2018-10-25 01:33:32,924 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 849 transitions. Word has length 42 [2018-10-25 01:33:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:33:32,925 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 849 transitions. [2018-10-25 01:33:32,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:33:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 849 transitions. [2018-10-25 01:33:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-25 01:33:32,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:33:32,933 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:33:32,933 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:33:32,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:33:32,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1369215340, now seen corresponding path program 1 times [2018-10-25 01:33:32,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:33:32,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:32,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:33:32,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:32,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:33:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:33:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:33:33,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:33:33,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-25 01:33:33,317 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:33:33,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 01:33:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 01:33:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-25 01:33:33,320 INFO L87 Difference]: Start difference. First operand 488 states and 849 transitions. Second operand 5 states. [2018-10-25 01:33:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:33:38,103 INFO L93 Difference]: Finished difference Result 1731 states and 3162 transitions. [2018-10-25 01:33:38,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-25 01:33:38,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2018-10-25 01:33:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:33:38,114 INFO L225 Difference]: With dead ends: 1731 [2018-10-25 01:33:38,115 INFO L226 Difference]: Without dead ends: 1249 [2018-10-25 01:33:38,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-25 01:33:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2018-10-25 01:33:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1032. [2018-10-25 01:33:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-10-25 01:33:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1658 transitions. [2018-10-25 01:33:38,199 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1658 transitions. Word has length 118 [2018-10-25 01:33:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:33:38,200 INFO L481 AbstractCegarLoop]: Abstraction has 1032 states and 1658 transitions. [2018-10-25 01:33:38,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 01:33:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1658 transitions. [2018-10-25 01:33:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-25 01:33:38,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:33:38,204 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:33:38,205 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:33:38,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:33:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1411728153, now seen corresponding path program 1 times [2018-10-25 01:33:38,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:33:38,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:38,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:33:38,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:38,207 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:33:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:33:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:33:38,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:33:38,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-25 01:33:38,402 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:33:38,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 01:33:38,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 01:33:38,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-25 01:33:38,404 INFO L87 Difference]: Start difference. First operand 1032 states and 1658 transitions. Second operand 5 states. [2018-10-25 01:33:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:33:42,540 INFO L93 Difference]: Finished difference Result 3666 states and 6091 transitions. [2018-10-25 01:33:42,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-25 01:33:42,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2018-10-25 01:33:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:33:42,558 INFO L225 Difference]: With dead ends: 3666 [2018-10-25 01:33:42,558 INFO L226 Difference]: Without dead ends: 2640 [2018-10-25 01:33:42,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-25 01:33:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2018-10-25 01:33:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2605. [2018-10-25 01:33:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2605 states. [2018-10-25 01:33:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 3731 transitions. [2018-10-25 01:33:42,642 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 3731 transitions. Word has length 129 [2018-10-25 01:33:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:33:42,643 INFO L481 AbstractCegarLoop]: Abstraction has 2605 states and 3731 transitions. [2018-10-25 01:33:42,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 01:33:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 3731 transitions. [2018-10-25 01:33:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-25 01:33:42,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:33:42,648 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:33:42,648 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:33:42,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:33:42,648 INFO L82 PathProgramCache]: Analyzing trace with hash 713476527, now seen corresponding path program 1 times [2018-10-25 01:33:42,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:33:42,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:42,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:33:42,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:42,650 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:33:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:33:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:33:43,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:33:43,303 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:33:43,304 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 175 with the following transitions: [2018-10-25 01:33:43,306 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [237], [239], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-25 01:33:43,355 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:33:43,356 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:33:44,813 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:33:44,815 INFO L272 AbstractInterpreter]: Visited 140 different actions 406 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-10-25 01:33:44,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:33:44,850 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:33:44,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:33:44,850 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:33:44,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:33:44,976 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:33:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:33:45,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:33:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:33:45,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:33:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:33:45,659 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:33:45,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-10-25 01:33:45,660 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:33:45,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:33:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:33:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-25 01:33:45,662 INFO L87 Difference]: Start difference. First operand 2605 states and 3731 transitions. Second operand 3 states. [2018-10-25 01:33:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:33:48,697 INFO L93 Difference]: Finished difference Result 6000 states and 8839 transitions. [2018-10-25 01:33:48,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:33:48,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2018-10-25 01:33:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:33:48,716 INFO L225 Difference]: With dead ends: 6000 [2018-10-25 01:33:48,716 INFO L226 Difference]: Without dead ends: 3401 [2018-10-25 01:33:48,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-25 01:33:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3401 states. [2018-10-25 01:33:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3401 to 3205. [2018-10-25 01:33:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3205 states. [2018-10-25 01:33:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 4562 transitions. [2018-10-25 01:33:48,808 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 4562 transitions. Word has length 174 [2018-10-25 01:33:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:33:48,809 INFO L481 AbstractCegarLoop]: Abstraction has 3205 states and 4562 transitions. [2018-10-25 01:33:48,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:33:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 4562 transitions. [2018-10-25 01:33:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-25 01:33:48,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:33:48,814 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:33:48,814 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:33:48,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:33:48,815 INFO L82 PathProgramCache]: Analyzing trace with hash -910630669, now seen corresponding path program 1 times [2018-10-25 01:33:48,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:33:48,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:48,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:33:48,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:33:48,816 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:33:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:33:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 70 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-25 01:33:49,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:33:49,061 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:33:49,062 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 200 with the following transitions: [2018-10-25 01:33:49,062 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [237], [239], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-25 01:33:49,066 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:33:49,066 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:33:49,347 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 01:33:49,347 INFO L272 AbstractInterpreter]: Visited 89 different actions 89 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-10-25 01:33:49,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:33:49,385 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 01:33:49,890 INFO L232 lantSequenceWeakener]: Weakened 190 states. On average, predicates are now at 73.45% of their original sizes. [2018-10-25 01:33:49,890 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 01:33:50,138 INFO L413 sIntCurrentIteration]: We have 198 unified AI predicates [2018-10-25 01:33:50,138 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 01:33:50,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:33:50,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-25 01:33:50,139 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:33:50,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 01:33:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 01:33:50,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 01:33:50,141 INFO L87 Difference]: Start difference. First operand 3205 states and 4562 transitions. Second operand 6 states. [2018-10-25 01:35:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:35:40,685 INFO L93 Difference]: Finished difference Result 6596 states and 9338 transitions. [2018-10-25 01:35:40,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 01:35:40,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 199 [2018-10-25 01:35:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:35:40,700 INFO L225 Difference]: With dead ends: 6596 [2018-10-25 01:35:40,701 INFO L226 Difference]: Without dead ends: 3397 [2018-10-25 01:35:40,710 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-25 01:35:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2018-10-25 01:35:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 3395. [2018-10-25 01:35:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3395 states. [2018-10-25 01:35:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 4761 transitions. [2018-10-25 01:35:40,803 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 4761 transitions. Word has length 199 [2018-10-25 01:35:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:35:40,804 INFO L481 AbstractCegarLoop]: Abstraction has 3395 states and 4761 transitions. [2018-10-25 01:35:40,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 01:35:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 4761 transitions. [2018-10-25 01:35:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-25 01:35:40,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:35:40,812 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:35:40,813 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:35:40,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:35:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash -616752310, now seen corresponding path program 1 times [2018-10-25 01:35:40,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:35:40,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:35:40,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:35:40,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:35:40,815 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:35:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:35:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 181 proven. 72 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-25 01:35:41,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:35:41,397 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:35:41,397 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 317 with the following transitions: [2018-10-25 01:35:41,398 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [237], [239], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-25 01:35:41,403 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:35:41,403 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:35:42,070 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 01:35:42,071 INFO L272 AbstractInterpreter]: Visited 126 different actions 246 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-10-25 01:35:42,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:35:42,098 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 01:35:43,362 INFO L232 lantSequenceWeakener]: Weakened 177 states. On average, predicates are now at 73.76% of their original sizes. [2018-10-25 01:35:43,362 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 01:35:43,954 INFO L413 sIntCurrentIteration]: We have 315 unified AI predicates [2018-10-25 01:35:43,954 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 01:35:43,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:35:43,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [6] total 19 [2018-10-25 01:35:43,954 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:35:43,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-25 01:35:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-25 01:35:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-10-25 01:35:43,956 INFO L87 Difference]: Start difference. First operand 3395 states and 4761 transitions. Second operand 15 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown