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/Problem12_label14_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 14:38:01,827 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 14:38:01,830 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 14:38:01,841 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 14:38:01,842 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 14:38:01,843 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 14:38:01,846 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 14:38:01,849 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 14:38:01,851 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 14:38:01,853 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 14:38:01,854 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 14:38:01,856 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 14:38:01,857 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 14:38:01,858 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 14:38:01,859 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 14:38:01,862 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 14:38:01,863 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 14:38:01,872 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 14:38:01,874 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 14:38:01,878 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 14:38:01,879 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 14:38:01,882 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 14:38:01,886 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 14:38:01,886 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 14:38:01,886 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 14:38:01,887 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 14:38:01,888 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 14:38:01,890 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 14:38:01,891 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 14:38:01,893 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 14:38:01,893 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 14:38:01,894 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 14:38:01,894 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 14:38:01,894 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 14:38:01,897 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 14:38:01,897 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 14:38:01,898 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 14:38:01,923 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 14:38:01,924 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 14:38:01,925 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 14:38:01,925 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 14:38:01,925 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 14:38:01,926 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 14:38:01,926 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 14:38:01,926 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 14:38:01,926 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 14:38:01,926 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 14:38:01,927 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 14:38:01,927 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 14:38:01,928 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 14:38:01,929 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 14:38:01,929 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 14:38:01,929 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 14:38:01,929 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 14:38:01,929 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 14:38:01,930 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 14:38:01,930 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 14:38:01,930 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 14:38:01,930 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 14:38:01,930 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 14:38:01,931 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 14:38:01,932 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 14:38:01,932 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 14:38:01,932 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 14:38:01,932 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 14:38:01,933 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 14:38:01,933 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 14:38:01,933 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 14:38:01,933 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 14:38:01,933 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 14:38:01,933 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 14:38:01,995 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 14:38:02,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 14:38:02,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 14:38:02,018 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 14:38:02,018 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 14:38:02,019 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label14_true-unreach-call.c [2018-11-07 14:38:02,091 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6facf20/f569c767662d4dc389a19a928a57872c/FLAG7e9d57f6d [2018-11-07 14:38:02,830 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 14:38:02,831 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label14_true-unreach-call.c [2018-11-07 14:38:02,859 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6facf20/f569c767662d4dc389a19a928a57872c/FLAG7e9d57f6d [2018-11-07 14:38:02,876 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb6facf20/f569c767662d4dc389a19a928a57872c [2018-11-07 14:38:02,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 14:38:02,889 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 14:38:02,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 14:38:02,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 14:38:02,894 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 14:38:02,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:38:02" (1/1) ... [2018-11-07 14:38:02,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f159c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:02, skipping insertion in model container [2018-11-07 14:38:02,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:38:02" (1/1) ... [2018-11-07 14:38:02,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 14:38:03,048 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 14:38:04,286 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:38:04,292 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 14:38:04,920 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 14:38:04,956 INFO L193 MainTranslator]: Completed translation [2018-11-07 14:38:04,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04 WrapperNode [2018-11-07 14:38:04,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 14:38:04,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 14:38:04,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 14:38:04,958 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 14:38:04,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 14:38:05,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 14:38:05,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 14:38:05,269 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 14:38:05,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (1/1) ... [2018-11-07 14:38:05,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 14:38:05,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 14:38:05,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 14:38:05,532 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 14:38:05,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (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 14:38:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 14:38:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 14:38:05,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 14:38:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 14:38:05,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 14:38:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 14:38:05,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 14:38:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 14:38:05,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 14:38:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 14:38:05,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 14:38:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 14:38:05,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 14:38:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 14:38:05,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 14:38:13,827 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 14:38:13,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:38:13 BoogieIcfgContainer [2018-11-07 14:38:13,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 14:38:13,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 14:38:13,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 14:38:13,832 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 14:38:13,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:38:02" (1/3) ... [2018-11-07 14:38:13,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d32e3ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:38:13, skipping insertion in model container [2018-11-07 14:38:13,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:38:04" (2/3) ... [2018-11-07 14:38:13,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d32e3ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:38:13, skipping insertion in model container [2018-11-07 14:38:13,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:38:13" (3/3) ... [2018-11-07 14:38:13,836 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label14_true-unreach-call.c [2018-11-07 14:38:13,846 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 14:38:13,856 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 14:38:13,874 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 14:38:13,932 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 14:38:13,932 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 14:38:13,933 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 14:38:13,933 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 14:38:13,933 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 14:38:13,933 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 14:38:13,933 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 14:38:13,933 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 14:38:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-11-07 14:38:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-07 14:38:14,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:38:14,009 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, 1, 1, 1, 1, 1] [2018-11-07 14:38:14,011 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:38:14,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1198355269, now seen corresponding path program 1 times [2018-11-07 14:38:14,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:38:14,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:14,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:38:14,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:14,073 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:38:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:38:14,517 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 14:38:14,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:38:14,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 14:38:14,520 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:38:14,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 14:38:14,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 14:38:14,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 14:38:14,549 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-11-07 14:38:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:38:27,094 INFO L93 Difference]: Finished difference Result 3234 states and 6255 transitions. [2018-11-07 14:38:27,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 14:38:27,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-11-07 14:38:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:38:27,135 INFO L225 Difference]: With dead ends: 3234 [2018-11-07 14:38:27,136 INFO L226 Difference]: Without dead ends: 2388 [2018-11-07 14:38:27,153 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 14:38:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2018-11-07 14:38:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1604. [2018-11-07 14:38:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-11-07 14:38:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2600 transitions. [2018-11-07 14:38:27,339 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2600 transitions. Word has length 55 [2018-11-07 14:38:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:38:27,339 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2600 transitions. [2018-11-07 14:38:27,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 14:38:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2600 transitions. [2018-11-07 14:38:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-07 14:38:27,347 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:38:27,348 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, 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] [2018-11-07 14:38:27,348 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:38:27,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:27,348 INFO L82 PathProgramCache]: Analyzing trace with hash -295662528, now seen corresponding path program 1 times [2018-11-07 14:38:27,349 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:38:27,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:27,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:38:27,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:27,350 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:38:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:38:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:38:27,627 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:38:27,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 14:38:27,628 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:38:27,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 14:38:27,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 14:38:27,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-07 14:38:27,631 INFO L87 Difference]: Start difference. First operand 1604 states and 2600 transitions. Second operand 5 states. [2018-11-07 14:38:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:38:38,561 INFO L93 Difference]: Finished difference Result 4873 states and 7923 transitions. [2018-11-07 14:38:38,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 14:38:38,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2018-11-07 14:38:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:38:38,591 INFO L225 Difference]: With dead ends: 4873 [2018-11-07 14:38:38,592 INFO L226 Difference]: Without dead ends: 3275 [2018-11-07 14:38:38,597 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:38:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2018-11-07 14:38:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3241. [2018-11-07 14:38:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2018-11-07 14:38:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 4816 transitions. [2018-11-07 14:38:38,719 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 4816 transitions. Word has length 135 [2018-11-07 14:38:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:38:38,720 INFO L480 AbstractCegarLoop]: Abstraction has 3241 states and 4816 transitions. [2018-11-07 14:38:38,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 14:38:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 4816 transitions. [2018-11-07 14:38:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-07 14:38:38,724 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:38:38,725 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, 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] [2018-11-07 14:38:38,725 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:38:38,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash 269121193, now seen corresponding path program 1 times [2018-11-07 14:38:38,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:38:38,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:38,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:38:38,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:38,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:38:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:38:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:38:38,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:38:38,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:38:38,993 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:38:38,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:38:38,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:38:38,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:38:38,994 INFO L87 Difference]: Start difference. First operand 3241 states and 4816 transitions. Second operand 6 states. [2018-11-07 14:38:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:38:45,905 INFO L93 Difference]: Finished difference Result 9805 states and 14879 transitions. [2018-11-07 14:38:45,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:38:45,906 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-11-07 14:38:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:38:45,941 INFO L225 Difference]: With dead ends: 9805 [2018-11-07 14:38:45,941 INFO L226 Difference]: Without dead ends: 6570 [2018-11-07 14:38:45,950 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 14:38:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6570 states. [2018-11-07 14:38:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6570 to 6496. [2018-11-07 14:38:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6496 states. [2018-11-07 14:38:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6496 states to 6496 states and 9467 transitions. [2018-11-07 14:38:46,107 INFO L78 Accepts]: Start accepts. Automaton has 6496 states and 9467 transitions. Word has length 164 [2018-11-07 14:38:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:38:46,108 INFO L480 AbstractCegarLoop]: Abstraction has 6496 states and 9467 transitions. [2018-11-07 14:38:46,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:38:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 6496 states and 9467 transitions. [2018-11-07 14:38:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-07 14:38:46,111 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:38:46,111 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, 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] [2018-11-07 14:38:46,111 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:38:46,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash 960199113, now seen corresponding path program 1 times [2018-11-07 14:38:46,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:38:46,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:46,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:38:46,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:46,114 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:38:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:38:46,408 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:38:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 14:38:46,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 14:38:46,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 14:38:46,795 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:38:46,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 14:38:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 14:38:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 14:38:46,797 INFO L87 Difference]: Start difference. First operand 6496 states and 9467 transitions. Second operand 6 states. [2018-11-07 14:38:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 14:38:56,039 INFO L93 Difference]: Finished difference Result 21863 states and 33119 transitions. [2018-11-07 14:38:56,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 14:38:56,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-11-07 14:38:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 14:38:56,120 INFO L225 Difference]: With dead ends: 21863 [2018-11-07 14:38:56,120 INFO L226 Difference]: Without dead ends: 15373 [2018-11-07 14:38:56,153 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 14:38:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15373 states. [2018-11-07 14:38:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15373 to 15285. [2018-11-07 14:38:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15285 states. [2018-11-07 14:38:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15285 states to 15285 states and 21398 transitions. [2018-11-07 14:38:56,525 INFO L78 Accepts]: Start accepts. Automaton has 15285 states and 21398 transitions. Word has length 180 [2018-11-07 14:38:56,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 14:38:56,526 INFO L480 AbstractCegarLoop]: Abstraction has 15285 states and 21398 transitions. [2018-11-07 14:38:56,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 14:38:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 15285 states and 21398 transitions. [2018-11-07 14:38:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-07 14:38:56,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 14:38:56,533 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, 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] [2018-11-07 14:38:56,533 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 14:38:56,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash -178064156, now seen corresponding path program 1 times [2018-11-07 14:38:56,534 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 14:38:56,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:56,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 14:38:56,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 14:38:56,536 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 14:38:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 14:38:56,850 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 14:38:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 14:38:57,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 14:38:57,022 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 14:38:57,023 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 202 with the following transitions: [2018-11-07 14:38:57,026 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2207], [2209], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [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], [2664], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-11-07 14:38:57,075 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 14:38:57,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 14:38:57,839 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 14:38:59,049 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 14:38:59,051 INFO L272 AbstractInterpreter]: Visited 153 different actions 300 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 14:38:59,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 14:38:59,093 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 14:38:59,879 INFO L227 lantSequenceWeakener]: Weakened 121 states. On average, predicates are now at 76.57% of their original sizes. [2018-11-07 14:38:59,879 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 14:39:01,026 INFO L415 sIntCurrentIteration]: We unified 200 AI predicates to 200 [2018-11-07 14:39:01,027 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 14:39:01,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 14:39:01,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [4] total 20 [2018-11-07 14:39:01,028 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 14:39:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 14:39:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 14:39:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-11-07 14:39:01,030 INFO L87 Difference]: Start difference. First operand 15285 states and 21398 transitions. Second operand 18 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown