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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label03_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 21:28:00,684 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 21:28:00,686 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 21:28:00,702 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 21:28:00,703 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 21:28:00,704 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 21:28:00,705 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 21:28:00,707 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 21:28:00,708 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 21:28:00,709 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 21:28:00,710 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 21:28:00,710 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 21:28:00,711 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 21:28:00,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 21:28:00,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 21:28:00,714 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 21:28:00,715 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 21:28:00,717 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 21:28:00,719 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 21:28:00,721 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 21:28:00,722 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 21:28:00,723 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 21:28:00,725 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 21:28:00,732 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 21:28:00,732 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 21:28:00,733 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 21:28:00,733 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 21:28:00,734 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 21:28:00,749 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 21:28:00,750 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 21:28:00,751 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 21:28:00,751 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 21:28:00,751 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 21:28:00,751 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 21:28:00,751 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 21:28:00,752 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 21:28:00,752 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 21:28:00,752 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 21:28:00,752 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 21:28:00,753 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 21:28:00,753 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 21:28:00,753 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 21:28:00,754 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 21:28:00,754 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 21:28:00,754 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 21:28:00,754 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 21:28:00,754 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 21:28:00,755 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 21:28:00,755 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 21:28:00,755 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 21:28:00,755 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 21:28:00,755 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 21:28:00,756 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 21:28:00,756 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 21:28:00,756 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 21:28:00,756 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 21:28:00,756 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 21:28:00,756 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 21:28:00,757 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 21:28:00,757 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 21:28:00,757 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 21:28:00,757 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 21:28:00,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 21:28:00,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 21:28:00,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 21:28:00,831 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 21:28:00,832 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 21:28:00,832 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label03_true-unreach-call.c [2018-10-24 21:28:00,894 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3bff98c4c/ffa570cea24c44358b99c542ba1019b8/FLAG7cb879976 [2018-10-24 21:28:01,724 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 21:28:01,726 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label03_true-unreach-call.c [2018-10-24 21:28:01,768 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3bff98c4c/ffa570cea24c44358b99c542ba1019b8/FLAG7cb879976 [2018-10-24 21:28:01,791 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3bff98c4c/ffa570cea24c44358b99c542ba1019b8 [2018-10-24 21:28:01,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 21:28:01,806 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 21:28:01,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 21:28:01,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 21:28:01,816 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 21:28:01,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:28:01" (1/1) ... [2018-10-24 21:28:01,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d685f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:01, skipping insertion in model container [2018-10-24 21:28:01,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:28:01" (1/1) ... [2018-10-24 21:28:01,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 21:28:02,046 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 21:28:03,508 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 21:28:03,514 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 21:28:04,384 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 21:28:04,421 INFO L193 MainTranslator]: Completed translation [2018-10-24 21:28:04,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04 WrapperNode [2018-10-24 21:28:04,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 21:28:04,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 21:28:04,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 21:28:04,424 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 21:28:04,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:04,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 21:28:05,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 21:28:05,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 21:28:05,010 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 21:28:05,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (1/1) ... [2018-10-24 21:28:05,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 21:28:05,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 21:28:05,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 21:28:05,317 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 21:28:05,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (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 [2018-10-24 21:28:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 21:28:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 21:28:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 21:28:05,381 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 21:28:05,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 21:28:05,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 21:28:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 21:28:05,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 21:28:05,382 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 21:28:05,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 21:28:05,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 21:28:05,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 21:28:05,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 21:28:05,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 21:28:15,574 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 21:28:15,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:28:15 BoogieIcfgContainer [2018-10-24 21:28:15,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 21:28:15,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 21:28:15,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 21:28:15,583 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 21:28:15,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:28:01" (1/3) ... [2018-10-24 21:28:15,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2488006d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:28:15, skipping insertion in model container [2018-10-24 21:28:15,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:28:04" (2/3) ... [2018-10-24 21:28:15,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2488006d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:28:15, skipping insertion in model container [2018-10-24 21:28:15,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:28:15" (3/3) ... [2018-10-24 21:28:15,591 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label03_true-unreach-call.c [2018-10-24 21:28:15,602 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 21:28:15,622 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 21:28:15,642 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 21:28:15,697 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 21:28:15,698 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 21:28:15,698 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 21:28:15,698 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 21:28:15,698 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 21:28:15,698 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 21:28:15,698 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 21:28:15,699 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 21:28:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-24 21:28:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-24 21:28:15,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:28:15,753 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] [2018-10-24 21:28:15,756 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:28:15,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:28:15,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1009220837, now seen corresponding path program 1 times [2018-10-24 21:28:15,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:28:15,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:28:15,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:28:15,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:28:15,825 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:28:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:28:16,255 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 21:28:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:28:16,276 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:28:16,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 21:28:16,276 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:28:16,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 21:28:16,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 21:28:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 21:28:16,327 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-10-24 21:28:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:28:34,301 INFO L93 Difference]: Finished difference Result 4065 states and 7606 transitions. [2018-10-24 21:28:34,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 21:28:34,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-10-24 21:28:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:28:34,363 INFO L225 Difference]: With dead ends: 4065 [2018-10-24 21:28:34,363 INFO L226 Difference]: Without dead ends: 2939 [2018-10-24 21:28:34,383 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 [2018-10-24 21:28:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2018-10-24 21:28:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 1972. [2018-10-24 21:28:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1972 states. [2018-10-24 21:28:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 3594 transitions. [2018-10-24 21:28:34,612 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 3594 transitions. Word has length 41 [2018-10-24 21:28:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:28:34,613 INFO L481 AbstractCegarLoop]: Abstraction has 1972 states and 3594 transitions. [2018-10-24 21:28:34,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 21:28:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 3594 transitions. [2018-10-24 21:28:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-24 21:28:34,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:28:34,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 21:28:34,621 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:28:34,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:28:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1838928187, now seen corresponding path program 1 times [2018-10-24 21:28:34,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:28:34,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:28:34,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:28:34,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:28:34,623 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:28:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:28:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:28:35,013 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:28:35,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 21:28:35,013 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:28:35,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 21:28:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 21:28:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 21:28:35,016 INFO L87 Difference]: Start difference. First operand 1972 states and 3594 transitions. Second operand 6 states. [2018-10-24 21:28:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:28:53,708 INFO L93 Difference]: Finished difference Result 7229 states and 13604 transitions. [2018-10-24 21:28:53,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 21:28:53,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2018-10-24 21:28:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:28:53,759 INFO L225 Difference]: With dead ends: 7229 [2018-10-24 21:28:53,760 INFO L226 Difference]: Without dead ends: 5263 [2018-10-24 21:28:53,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 21:28:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2018-10-24 21:28:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5236. [2018-10-24 21:28:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2018-10-24 21:28:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8452 transitions. [2018-10-24 21:28:54,076 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8452 transitions. Word has length 114 [2018-10-24 21:28:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:28:54,077 INFO L481 AbstractCegarLoop]: Abstraction has 5236 states and 8452 transitions. [2018-10-24 21:28:54,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 21:28:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8452 transitions. [2018-10-24 21:28:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-24 21:28:54,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:28:54,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 21:28:54,085 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:28:54,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:28:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1607294046, now seen corresponding path program 1 times [2018-10-24 21:28:54,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:28:54,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:28:54,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:28:54,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:28:54,087 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:28:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:28:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:28:54,353 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:28:54,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 21:28:54,353 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:28:54,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 21:28:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 21:28:54,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 21:28:54,354 INFO L87 Difference]: Start difference. First operand 5236 states and 8452 transitions. Second operand 5 states. [2018-10-24 21:29:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:29:14,925 INFO L93 Difference]: Finished difference Result 15744 states and 26206 transitions. [2018-10-24 21:29:14,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 21:29:14,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2018-10-24 21:29:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:29:14,987 INFO L225 Difference]: With dead ends: 15744 [2018-10-24 21:29:14,987 INFO L226 Difference]: Without dead ends: 10514 [2018-10-24 21:29:15,013 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 [2018-10-24 21:29:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2018-10-24 21:29:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 10312. [2018-10-24 21:29:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10312 states. [2018-10-24 21:29:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10312 states to 10312 states and 15539 transitions. [2018-10-24 21:29:15,320 INFO L78 Accepts]: Start accepts. Automaton has 10312 states and 15539 transitions. Word has length 143 [2018-10-24 21:29:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:29:15,321 INFO L481 AbstractCegarLoop]: Abstraction has 10312 states and 15539 transitions. [2018-10-24 21:29:15,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 21:29:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10312 states and 15539 transitions. [2018-10-24 21:29:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 21:29:15,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:29:15,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 21:29:15,325 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:29:15,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:29:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash -19334682, now seen corresponding path program 1 times [2018-10-24 21:29:15,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:29:15,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:29:15,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:29:15,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:29:15,328 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:29:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:29:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:29:15,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:29:15,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 21:29:15,745 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:29:15,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 21:29:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 21:29:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 21:29:15,747 INFO L87 Difference]: Start difference. First operand 10312 states and 15539 transitions. Second operand 5 states. [2018-10-24 21:29:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:29:42,609 INFO L93 Difference]: Finished difference Result 32130 states and 50309 transitions. [2018-10-24 21:29:42,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 21:29:42,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2018-10-24 21:29:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:29:42,714 INFO L225 Difference]: With dead ends: 32130 [2018-10-24 21:29:42,714 INFO L226 Difference]: Without dead ends: 21824 [2018-10-24 21:29:42,761 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 [2018-10-24 21:29:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21824 states. [2018-10-24 21:29:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21824 to 21598. [2018-10-24 21:29:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21598 states. [2018-10-24 21:29:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21598 states to 21598 states and 31847 transitions. [2018-10-24 21:29:43,314 INFO L78 Accepts]: Start accepts. Automaton has 21598 states and 31847 transitions. Word has length 147 [2018-10-24 21:29:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:29:43,315 INFO L481 AbstractCegarLoop]: Abstraction has 21598 states and 31847 transitions. [2018-10-24 21:29:43,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 21:29:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 21598 states and 31847 transitions. [2018-10-24 21:29:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-24 21:29:43,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:29:43,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 21:29:43,320 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:29:43,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:29:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash -389216454, now seen corresponding path program 1 times [2018-10-24 21:29:43,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:29:43,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:29:43,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:29:43,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:29:43,325 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:29:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:29:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:29:43,603 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:29:43,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 21:29:43,603 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:29:43,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 21:29:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 21:29:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 21:29:43,607 INFO L87 Difference]: Start difference. First operand 21598 states and 31847 transitions. Second operand 4 states. [2018-10-24 21:29:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:29:56,144 INFO L93 Difference]: Finished difference Result 83831 states and 134122 transitions. [2018-10-24 21:29:56,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 21:29:56,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2018-10-24 21:29:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:29:56,432 INFO L225 Difference]: With dead ends: 83831 [2018-10-24 21:29:56,432 INFO L226 Difference]: Without dead ends: 62239 [2018-10-24 21:29:56,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 21:29:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62239 states. [2018-10-24 21:29:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62239 to 62184. [2018-10-24 21:29:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62184 states. [2018-10-24 21:29:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62184 states to 62184 states and 90498 transitions. [2018-10-24 21:29:58,022 INFO L78 Accepts]: Start accepts. Automaton has 62184 states and 90498 transitions. Word has length 157 [2018-10-24 21:29:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:29:58,022 INFO L481 AbstractCegarLoop]: Abstraction has 62184 states and 90498 transitions. [2018-10-24 21:29:58,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 21:29:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 62184 states and 90498 transitions. [2018-10-24 21:29:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-24 21:29:58,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:29:58,061 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 21:29:58,062 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:29:58,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:29:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash -314239728, now seen corresponding path program 1 times [2018-10-24 21:29:58,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:29:58,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:29:58,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:29:58,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:29:58,064 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:29:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:29:58,367 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 21:29:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 68 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 21:29:58,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 21:29:58,818 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 21:29:58,820 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 311 with the following transitions: [2018-10-24 21:29:58,822 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2855], [2857], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3336], [3341], [3343], [3344], [3355], [3366], [3370], [3374], [3378], [3382], [3386], [3390], [3394], [3398], [3402], [3406], [3410], [3414], [3425], [3429], [3440], [3451], [3455], [3459], [3463], [3467], [3471], [3475], [3479], [3483], [3487], [3498], [3502], [3506], [3517], [3521], [3524], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-24 21:29:58,921 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 21:29:58,922 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 21:30:07,511 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 21:30:07,621 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 21:30:07,623 INFO L272 AbstractInterpreter]: Visited 155 different actions 155 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 21:30:07,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:30:07,666 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 21:30:13,802 INFO L232 lantSequenceWeakener]: Weakened 287 states. On average, predicates are now at 71.34% of their original sizes. [2018-10-24 21:30:13,803 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 21:30:15,629 INFO L413 sIntCurrentIteration]: We have 309 unified AI predicates [2018-10-24 21:30:15,630 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 21:30:15,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 21:30:15,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2018-10-24 21:30:15,631 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:30:15,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 21:30:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 21:30:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-10-24 21:30:15,632 INFO L87 Difference]: Start difference. First operand 62184 states and 90498 transitions. Second operand 12 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown