java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:44:20,732 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:44:20,737 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:44:20,755 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:44:20,755 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:44:20,757 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:44:20,758 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:44:20,761 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:44:20,763 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:44:20,764 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:44:20,772 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:44:20,772 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:44:20,774 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:44:20,776 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:44:20,779 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:44:20,779 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:44:20,780 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:44:20,784 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:44:20,787 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:44:20,789 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:44:20,792 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:44:20,794 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:44:20,797 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 15:44:20,806 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:44:20,806 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:44:20,808 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:44:20,809 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:44:20,810 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:44:20,835 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:44:20,835 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:44:20,838 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:44:20,839 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:44:20,839 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:44:20,839 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:44:20,839 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:44:20,840 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:44:20,840 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:44:20,840 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:44:20,840 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:44:20,840 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:44:20,841 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:44:20,841 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:44:20,841 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:44:20,842 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:44:20,843 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:44:20,843 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:44:20,843 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:44:20,844 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:44:20,844 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:44:20,844 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:44:20,844 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:44:20,844 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:44:20,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:44:20,845 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:44:20,845 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:44:20,845 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:44:20,845 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:44:20,846 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:44:20,846 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:44:20,846 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:44:20,846 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:44:20,846 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:44:20,923 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:44:20,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:44:20,940 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:44:20,941 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:44:20,942 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:44:20,943 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30_true-unreach-call.c [2018-11-07 15:44:21,010 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044f76231/03fe45b9a70b49059081267ca0069792/FLAG10f5d7991 [2018-11-07 15:44:21,670 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:44:21,671 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label30_true-unreach-call.c [2018-11-07 15:44:21,697 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044f76231/03fe45b9a70b49059081267ca0069792/FLAG10f5d7991 [2018-11-07 15:44:21,714 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044f76231/03fe45b9a70b49059081267ca0069792 [2018-11-07 15:44:21,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:44:21,727 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:44:21,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:44:21,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:44:21,733 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:44:21,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:44:21" (1/1) ... [2018-11-07 15:44:21,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d6e334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:21, skipping insertion in model container [2018-11-07 15:44:21,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:44:21" (1/1) ... [2018-11-07 15:44:21,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:44:21,890 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:44:22,993 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:44:23,000 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:44:23,472 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:44:23,502 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:44:23,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23 WrapperNode [2018-11-07 15:44:23,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:44:23,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:44:23,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:44:23,504 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:44:23,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:23,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:23,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:44:23,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:44:23,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:44:23,787 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:44:23,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:23,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:23,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:23,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:23,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:23,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:24,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... [2018-11-07 15:44:24,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:44:24,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:44:24,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:44:24,047 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:44:24,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 15:44:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:44:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:44:24,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:44:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 15:44:24,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 15:44:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:44:24,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:44:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:44:24,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:44:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:44:24,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:44:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:44:24,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:44:32,164 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:44:32,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:44:32 BoogieIcfgContainer [2018-11-07 15:44:32,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:44:32,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:44:32,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:44:32,169 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:44:32,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:44:21" (1/3) ... [2018-11-07 15:44:32,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d031ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:44:32, skipping insertion in model container [2018-11-07 15:44:32,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:44:23" (2/3) ... [2018-11-07 15:44:32,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d031ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:44:32, skipping insertion in model container [2018-11-07 15:44:32,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:44:32" (3/3) ... [2018-11-07 15:44:32,172 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label30_true-unreach-call.c [2018-11-07 15:44:32,183 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:44:32,195 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:44:32,213 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:44:32,275 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:44:32,275 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:44:32,275 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:44:32,276 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:44:32,276 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:44:32,277 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:44:32,277 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:44:32,277 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:44:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-11-07 15:44:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-07 15:44:32,331 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:44:32,332 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:44:32,335 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:44:32,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:44:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2116267860, now seen corresponding path program 1 times [2018-11-07 15:44:32,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:44:32,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:44:32,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:44:32,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:44:32,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:44:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:44:32,810 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 15:44:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:44:32,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:44:32,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:44:32,835 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:44:32,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:44:32,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:44:32,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:44:32,861 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-11-07 15:44:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:44:44,065 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-11-07 15:44:44,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:44:44,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2018-11-07 15:44:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:44:44,107 INFO L225 Difference]: With dead ends: 2974 [2018-11-07 15:44:44,107 INFO L226 Difference]: Without dead ends: 2193 [2018-11-07 15:44:44,119 INFO L604 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 [2018-11-07 15:44:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-11-07 15:44:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2018-11-07 15:44:44,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2193 states. [2018-11-07 15:44:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3506 transitions. [2018-11-07 15:44:44,321 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3506 transitions. Word has length 50 [2018-11-07 15:44:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:44:44,322 INFO L480 AbstractCegarLoop]: Abstraction has 2193 states and 3506 transitions. [2018-11-07 15:44:44,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:44:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3506 transitions. [2018-11-07 15:44:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-11-07 15:44:44,331 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:44:44,331 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:44:44,332 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:44:44,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:44:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash -940653118, now seen corresponding path program 1 times [2018-11-07 15:44:44,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:44:44,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:44:44,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:44:44,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:44:44,335 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:44:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:44:44,661 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:44:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:44:44,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:44:44,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:44:44,940 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:44:44,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:44:44,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:44:44,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:44:44,949 INFO L87 Difference]: Start difference. First operand 2193 states and 3506 transitions. Second operand 5 states. [2018-11-07 15:44:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:44:56,250 INFO L93 Difference]: Finished difference Result 6600 states and 10738 transitions. [2018-11-07 15:44:56,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:44:56,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2018-11-07 15:44:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:44:56,288 INFO L225 Difference]: With dead ends: 6600 [2018-11-07 15:44:56,289 INFO L226 Difference]: Without dead ends: 4413 [2018-11-07 15:44:56,297 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:44:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-11-07 15:44:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 4378. [2018-11-07 15:44:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4378 states. [2018-11-07 15:44:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 6712 transitions. [2018-11-07 15:44:56,430 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 6712 transitions. Word has length 120 [2018-11-07 15:44:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:44:56,431 INFO L480 AbstractCegarLoop]: Abstraction has 4378 states and 6712 transitions. [2018-11-07 15:44:56,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:44:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 6712 transitions. [2018-11-07 15:44:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-07 15:44:56,437 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:44:56,437 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:44:56,437 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:44:56,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:44:56,438 INFO L82 PathProgramCache]: Analyzing trace with hash 599162315, now seen corresponding path program 1 times [2018-11-07 15:44:56,438 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:44:56,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:44:56,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:44:56,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:44:56,439 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:44:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:44:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:44:56,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:44:56,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:44:56,698 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:44:56,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:44:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:44:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:44:56,700 INFO L87 Difference]: Start difference. First operand 4378 states and 6712 transitions. Second operand 6 states. [2018-11-07 15:45:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:45:01,887 INFO L93 Difference]: Finished difference Result 11002 states and 16943 transitions. [2018-11-07 15:45:01,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:45:01,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2018-11-07 15:45:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:45:01,924 INFO L225 Difference]: With dead ends: 11002 [2018-11-07 15:45:01,924 INFO L226 Difference]: Without dead ends: 6630 [2018-11-07 15:45:01,939 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:45:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2018-11-07 15:45:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 6590. [2018-11-07 15:45:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2018-11-07 15:45:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 8773 transitions. [2018-11-07 15:45:02,133 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 8773 transitions. Word has length 147 [2018-11-07 15:45:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:45:02,134 INFO L480 AbstractCegarLoop]: Abstraction has 6590 states and 8773 transitions. [2018-11-07 15:45:02,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:45:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 8773 transitions. [2018-11-07 15:45:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-07 15:45:02,137 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:45:02,138 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:45:02,138 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:45:02,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:45:02,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1887894889, now seen corresponding path program 1 times [2018-11-07 15:45:02,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:45:02,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:45:02,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:45:02,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:45:02,141 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:45:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:45:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:45:02,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:45:02,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:45:02,425 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:45:02,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:45:02,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:45:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:45:02,427 INFO L87 Difference]: Start difference. First operand 6590 states and 8773 transitions. Second operand 4 states. [2018-11-07 15:45:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:45:08,241 INFO L93 Difference]: Finished difference Result 13174 states and 17554 transitions. [2018-11-07 15:45:08,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:45:08,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2018-11-07 15:45:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:45:08,267 INFO L225 Difference]: With dead ends: 13174 [2018-11-07 15:45:08,267 INFO L226 Difference]: Without dead ends: 6590 [2018-11-07 15:45:08,287 INFO L604 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 [2018-11-07 15:45:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6590 states. [2018-11-07 15:45:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 6590. [2018-11-07 15:45:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2018-11-07 15:45:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 8069 transitions. [2018-11-07 15:45:08,410 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 8069 transitions. Word has length 157 [2018-11-07 15:45:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:45:08,414 INFO L480 AbstractCegarLoop]: Abstraction has 6590 states and 8069 transitions. [2018-11-07 15:45:08,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:45:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 8069 transitions. [2018-11-07 15:45:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-11-07 15:45:08,419 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:45:08,419 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:45:08,419 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:45:08,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:45:08,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1024574149, now seen corresponding path program 1 times [2018-11-07 15:45:08,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:45:08,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:45:08,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:45:08,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:45:08,421 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:45:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:45:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 15:45:08,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:45:08,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:45:08,656 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:45:08,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:45:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:45:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:45:08,659 INFO L87 Difference]: Start difference. First operand 6590 states and 8069 transitions. Second operand 4 states. [2018-11-07 15:45:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:45:15,363 INFO L93 Difference]: Finished difference Result 26016 states and 32711 transitions. [2018-11-07 15:45:15,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:45:15,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2018-11-07 15:45:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:45:15,422 INFO L225 Difference]: With dead ends: 26016 [2018-11-07 15:45:15,422 INFO L226 Difference]: Without dead ends: 19432 [2018-11-07 15:45:15,445 INFO L604 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 [2018-11-07 15:45:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19432 states. [2018-11-07 15:45:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19432 to 19432. [2018-11-07 15:45:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19432 states. [2018-11-07 15:45:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19432 states to 19432 states and 23497 transitions. [2018-11-07 15:45:15,794 INFO L78 Accepts]: Start accepts. Automaton has 19432 states and 23497 transitions. Word has length 227 [2018-11-07 15:45:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:45:15,795 INFO L480 AbstractCegarLoop]: Abstraction has 19432 states and 23497 transitions. [2018-11-07 15:45:15,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:45:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19432 states and 23497 transitions. [2018-11-07 15:45:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2018-11-07 15:45:15,836 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:45:15,837 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:45:15,837 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:45:15,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:45:15,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1794025893, now seen corresponding path program 1 times [2018-11-07 15:45:15,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:45:15,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:45:15,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:45:15,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:45:15,839 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:45:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:45:16,359 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:45:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 87 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:45:17,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:45:17,593 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:45:17,595 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 579 with the following transitions: [2018-11-07 15:45:17,601 INFO L202 CegarAbsIntRunner]: [0], [1], [740], [744], [748], [752], [756], [760], [764], [768], [772], [776], [780], [784], [788], [792], [796], [800], [804], [808], [812], [816], [820], [824], [828], [832], [836], [840], [844], [848], [852], [856], [860], [864], [868], [872], [876], [880], [884], [888], [892], [896], [900], [904], [908], [912], [916], [920], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [964], [968], [972], [976], [980], [984], [988], [992], [996], [1000], [1004], [1008], [1012], [1016], [1020], [1024], [1028], [1032], [1036], [1040], [1044], [1048], [1052], [1056], [1060], [1064], [1068], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1183], [1623], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1923], [1925], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2328], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2673], [2677], [2681], [2685], [2689], [2693], [2697], [2701], [2705], [2709], [2713], [2717], [2721], [2725], [2729], [2733], [2737], [2741], [2745], [2749], [2753], [2757], [2761], [2765], [2769], [2773], [2777], [2781], [2785], [2789], [2793], [2797], [2801], [2805], [2809], [2813], [2817], [2821], [2825], [2829], [2833], [2837], [2841], [2845], [2849], [2853], [2857], [2861], [2865], [2869], [2873], [2877], [2881], [2885], [2889], [2893], [2897], [2901], [2905], [2909], [2913], [2917], [2921], [2925], [2929], [2933], [2937], [2941], [2945], [2949], [2953], [2957], [2961], [2965], [2969], [2973], [2977], [2981], [2985], [2989], [2993], [2995], [2996], [3000], [3004], [3010], [3014], [3016], [3023], [3024], [3025], [3026], [3027], [3029], [3030] [2018-11-07 15:45:17,686 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:45:17,686 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:45:19,087 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:45:19,089 INFO L272 AbstractInterpreter]: Visited 407 different actions 407 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:45:19,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:45:19,141 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:45:20,422 INFO L227 lantSequenceWeakener]: Weakened 566 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-07 15:45:20,422 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:45:20,951 INFO L415 sIntCurrentIteration]: We unified 577 AI predicates to 577 [2018-11-07 15:45:20,951 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:45:20,952 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:45:20,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2018-11-07 15:45:20,952 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:45:20,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 15:45:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 15:45:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-11-07 15:45:20,954 INFO L87 Difference]: Start difference. First operand 19432 states and 23497 transitions. Second operand 10 states. [2018-11-07 15:45:32,044 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown