./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1dbb3ffac91b20f4dd3e7b4eb671e84b2870fc33 --rcfgbuilder.size.of.a.code.block SingleStatement .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:44:41,863 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:44:41,865 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:44:41,877 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:44:41,877 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:44:41,878 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:44:41,880 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:44:41,882 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:44:41,884 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:44:41,885 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:44:41,886 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:44:41,886 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:44:41,887 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:44:41,888 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:44:41,890 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:44:41,891 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:44:41,892 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:44:41,894 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:44:41,896 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:44:41,898 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:44:41,899 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:44:41,900 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:44:41,903 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:44:41,904 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:44:41,904 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:44:41,905 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:44:41,906 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:44:41,907 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:44:41,908 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:44:41,910 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:44:41,910 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:44:41,911 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:44:41,911 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:44:41,911 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:44:41,912 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:44:41,914 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:44:41,914 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:44:41,930 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:44:41,931 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:44:41,931 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:44:41,932 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:44:41,932 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:44:41,932 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:44:41,932 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:44:41,932 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:44:41,932 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:44:41,933 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:44:41,934 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:44:41,935 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:44:41,935 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:44:41,935 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:44:41,935 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:44:41,935 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:44:41,935 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:44:41,936 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:44:41,937 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:44:41,937 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:44:41,937 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:44:41,937 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:44:41,937 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:44:41,938 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:44:41,938 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:44:41,938 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:44:41,938 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:44:41,938 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:44:41,938 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:44:41,939 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:44:41,940 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:44:41,940 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:44:41,940 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:44:41,941 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:44:41,941 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dbb3ffac91b20f4dd3e7b4eb671e84b2870fc33 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:44:41,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:44:42,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:44:42,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:44:42,009 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:44:42,010 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:44:42,010 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-22 09:44:42,064 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/52a36c5b0/72b90c7c8b1d4fedab5bcbc4c0d0e460/FLAG5e39e005e [2018-10-22 09:44:42,504 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:44:42,505 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-22 09:44:42,515 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/52a36c5b0/72b90c7c8b1d4fedab5bcbc4c0d0e460/FLAG5e39e005e [2018-10-22 09:44:42,532 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/52a36c5b0/72b90c7c8b1d4fedab5bcbc4c0d0e460 [2018-10-22 09:44:42,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:44:42,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:44:42,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:44:42,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:44:42,544 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:44:42,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f860f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42, skipping insertion in model container [2018-10-22 09:44:42,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:44:42,582 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:44:42,769 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:44:42,773 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:44:42,791 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:44:42,808 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:44:42,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42 WrapperNode [2018-10-22 09:44:42,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:44:42,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:44:42,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:44:42,810 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:44:42,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:44:42,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:44:42,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:44:42,836 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:44:42,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... [2018-10-22 09:44:42,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:44:42,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:44:42,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:44:42,863 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:44:42,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:44:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:44:43,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:44:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:44:43,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:44:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:44:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:44:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:44:43,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:44:43,239 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:44:43,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:44:43 BoogieIcfgContainer [2018-10-22 09:44:43,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:44:43,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:44:43,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:44:43,253 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:44:43,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:44:42" (1/3) ... [2018-10-22 09:44:43,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774774b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:44:43, skipping insertion in model container [2018-10-22 09:44:43,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:44:42" (2/3) ... [2018-10-22 09:44:43,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774774b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:44:43, skipping insertion in model container [2018-10-22 09:44:43,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:44:43" (3/3) ... [2018-10-22 09:44:43,259 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_true-unreach-call_true-termination.i [2018-10-22 09:44:43,275 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:44:43,294 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:44:43,320 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:44:43,366 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:44:43,367 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:44:43,367 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:44:43,367 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:44:43,368 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:44:43,368 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:44:43,368 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:44:43,368 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:44:43,368 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:44:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-22 09:44:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 09:44:43,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:43,394 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:43,397 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:43,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1743938047, now seen corresponding path program 1 times [2018-10-22 09:44:43,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:43,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:43,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:43,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:43,455 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:43,517 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:44:43,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:44:43,518 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:44:43,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:44:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:44:43,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:44:43,537 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-22 09:44:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:43,559 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-22 09:44:43,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:44:43,561 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-22 09:44:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:43,570 INFO L225 Difference]: With dead ends: 35 [2018-10-22 09:44:43,570 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 09:44:43,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:44:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 09:44:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 09:44:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 09:44:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 09:44:43,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2018-10-22 09:44:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:43,617 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 09:44:43,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:44:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 09:44:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 09:44:43,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:43,618 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:43,619 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:43,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1403530942, now seen corresponding path program 1 times [2018-10-22 09:44:43,620 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:43,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:43,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:43,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:43,622 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:43,682 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:44:43,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 09:44:43,682 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:44:43,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 09:44:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 09:44:43,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 09:44:43,685 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-10-22 09:44:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:43,715 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-22 09:44:43,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 09:44:43,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-22 09:44:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:43,717 INFO L225 Difference]: With dead ends: 28 [2018-10-22 09:44:43,718 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 09:44:43,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 09:44:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 09:44:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-10-22 09:44:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 09:44:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 09:44:43,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2018-10-22 09:44:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:43,724 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 09:44:43,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 09:44:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 09:44:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 09:44:43,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:43,726 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:43,726 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:43,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:43,726 INFO L82 PathProgramCache]: Analyzing trace with hash 13757798, now seen corresponding path program 1 times [2018-10-22 09:44:43,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:43,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:43,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:43,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:43,728 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:43,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:43,811 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:43,812 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-22 09:44:43,815 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [10], [13], [15], [16], [18], [19], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-22 09:44:43,859 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:44:43,860 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:44:44,277 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:44:44,279 INFO L272 AbstractInterpreter]: Visited 18 different actions 93 times. Merged at 7 different actions 57 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-22 09:44:44,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:44,321 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:44:44,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:44,321 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:44,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:44,339 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:44:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:44,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:44,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:44,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:44,544 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:44,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:44,572 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:44:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:44,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:44,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:44,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:44,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-10-22 09:44:44,632 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:44,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:44:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:44:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-22 09:44:44,638 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 5 states. [2018-10-22 09:44:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:44,980 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-22 09:44:44,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 09:44:44,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-10-22 09:44:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:44,982 INFO L225 Difference]: With dead ends: 34 [2018-10-22 09:44:44,983 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 09:44:44,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-22 09:44:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 09:44:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-22 09:44:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 09:44:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 09:44:44,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 19 [2018-10-22 09:44:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:44,990 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 09:44:44,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:44:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 09:44:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 09:44:44,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:44,991 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:44,991 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:44,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash 38538766, now seen corresponding path program 2 times [2018-10-22 09:44:44,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:44,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:44,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:44,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:44,994 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:45,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:45,141 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:45,141 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:44:45,141 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:44:45,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:45,142 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:45,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:44:45,157 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:44:45,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:44:45,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:45,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:45,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:45,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:45,353 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:45,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:44:45,381 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:44:45,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:44:45,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:45,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:45,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:45,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:45,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-10-22 09:44:45,467 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:45,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 09:44:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 09:44:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-10-22 09:44:45,473 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 7 states. [2018-10-22 09:44:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:45,590 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-22 09:44:45,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 09:44:45,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-10-22 09:44:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:45,594 INFO L225 Difference]: With dead ends: 40 [2018-10-22 09:44:45,594 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 09:44:45,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2018-10-22 09:44:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 09:44:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-10-22 09:44:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 09:44:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-22 09:44:45,602 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 25 [2018-10-22 09:44:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:45,602 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-22 09:44:45,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 09:44:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-22 09:44:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 09:44:45,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:45,604 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:45,604 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:45,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash -20639562, now seen corresponding path program 3 times [2018-10-22 09:44:45,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:45,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:45,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:44:45,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:45,606 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:45,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:45,764 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:45,764 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:44:45,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:44:45,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:45,765 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:45,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:44:45,786 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:44:45,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 09:44:45,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:45,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:45,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:46,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:46,307 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:46,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:44:46,325 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:44:46,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 09:44:46,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:46,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:46,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:46,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:46,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-10-22 09:44:46,402 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:46,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 09:44:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 09:44:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-10-22 09:44:46,403 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2018-10-22 09:44:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:46,573 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-22 09:44:46,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 09:44:46,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-10-22 09:44:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:46,578 INFO L225 Difference]: With dead ends: 46 [2018-10-22 09:44:46,578 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 09:44:46,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2018-10-22 09:44:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 09:44:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-10-22 09:44:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 09:44:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-22 09:44:46,584 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 31 [2018-10-22 09:44:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:46,585 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-22 09:44:46,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 09:44:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-22 09:44:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 09:44:46,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:46,587 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:46,587 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:46,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2146732706, now seen corresponding path program 4 times [2018-10-22 09:44:46,587 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:46,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:46,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:44:46,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:46,589 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:46,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:46,790 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:46,791 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:44:46,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:44:46,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:46,791 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:46,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:44:46,800 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:44:46,828 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:44:46,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:46,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:46,848 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:47,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:47,075 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:47,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:44:47,092 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:44:47,108 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:44:47,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:47,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:47,122 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:47,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:47,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 17 [2018-10-22 09:44:47,215 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:47,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 09:44:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 09:44:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-22 09:44:47,216 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 11 states. [2018-10-22 09:44:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:47,386 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 09:44:47,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 09:44:47,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-10-22 09:44:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:47,389 INFO L225 Difference]: With dead ends: 52 [2018-10-22 09:44:47,389 INFO L226 Difference]: Without dead ends: 47 [2018-10-22 09:44:47,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2018-10-22 09:44:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-22 09:44:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2018-10-22 09:44:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 09:44:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-22 09:44:47,395 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 37 [2018-10-22 09:44:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:47,395 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-22 09:44:47,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 09:44:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-22 09:44:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 09:44:47,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:47,397 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:47,397 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:47,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash 453884934, now seen corresponding path program 5 times [2018-10-22 09:44:47,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:47,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:47,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:44:47,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:47,399 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:47,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:47,653 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:47,653 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:44:47,653 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:44:47,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:47,653 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:47,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:44:47,663 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:44:47,682 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 09:44:47,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:47,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:47,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:47,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:47,894 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:47,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:44:47,911 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:44:47,948 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 09:44:47,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:47,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:47,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:48,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:48,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 17 [2018-10-22 09:44:48,100 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:48,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 09:44:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 09:44:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-22 09:44:48,101 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 13 states. [2018-10-22 09:44:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:48,420 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-22 09:44:48,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 09:44:48,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2018-10-22 09:44:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:48,424 INFO L225 Difference]: With dead ends: 58 [2018-10-22 09:44:48,424 INFO L226 Difference]: Without dead ends: 53 [2018-10-22 09:44:48,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2018-10-22 09:44:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-22 09:44:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2018-10-22 09:44:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-22 09:44:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-22 09:44:48,430 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 43 [2018-10-22 09:44:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:48,430 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-22 09:44:48,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 09:44:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-22 09:44:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 09:44:48,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:48,432 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:48,432 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:48,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1747295058, now seen corresponding path program 6 times [2018-10-22 09:44:48,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:48,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:48,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:44:48,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:48,434 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:48,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:48,644 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:48,644 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:44:48,645 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:44:48,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:48,646 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:48,658 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:44:48,658 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:44:48,675 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 09:44:48,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:48,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:48,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:48,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:48,936 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:48,951 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:44:48,952 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:44:48,999 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 09:44:48,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:49,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:49,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:49,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:49,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15] total 17 [2018-10-22 09:44:49,150 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:49,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 09:44:49,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 09:44:49,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-22 09:44:49,153 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 15 states. [2018-10-22 09:44:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:49,564 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-22 09:44:49,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 09:44:49,565 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2018-10-22 09:44:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:49,567 INFO L225 Difference]: With dead ends: 64 [2018-10-22 09:44:49,567 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 09:44:49,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 172 SyntacticMatches, 22 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2018-10-22 09:44:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 09:44:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2018-10-22 09:44:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 09:44:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-22 09:44:49,577 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 49 [2018-10-22 09:44:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:49,577 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-22 09:44:49,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 09:44:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-22 09:44:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 09:44:49,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:49,580 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:49,580 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:49,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash 429911894, now seen corresponding path program 7 times [2018-10-22 09:44:49,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:49,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:49,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:44:49,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:49,583 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:49,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:49,811 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:49,811 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:44:49,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:44:49,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:49,812 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:49,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:49,821 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:44:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:49,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:49,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:50,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:50,068 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:50,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:50,084 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:44:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:50,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:50,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:50,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:50,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17] total 17 [2018-10-22 09:44:50,339 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:50,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 09:44:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 09:44:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-10-22 09:44:50,340 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 17 states. [2018-10-22 09:44:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:50,622 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 09:44:50,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 09:44:50,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2018-10-22 09:44:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:50,626 INFO L225 Difference]: With dead ends: 67 [2018-10-22 09:44:50,626 INFO L226 Difference]: Without dead ends: 62 [2018-10-22 09:44:50,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 192 SyntacticMatches, 28 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-10-22 09:44:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-22 09:44:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-22 09:44:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 09:44:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-22 09:44:50,634 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 55 [2018-10-22 09:44:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:50,634 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-22 09:44:50,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 09:44:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-22 09:44:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 09:44:50,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:50,636 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:50,636 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:50,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1185733630, now seen corresponding path program 8 times [2018-10-22 09:44:50,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:50,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:50,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:44:50,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:50,638 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:50,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:50,864 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:44:50,865 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:44:50,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:44:50,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:50,865 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:44:50,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:44:50,879 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:44:50,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:44:50,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:50,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:51,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:51,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:44:51,633 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:44:51,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:44:51,659 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:44:51,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:44:51,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:44:51,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:44:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:51,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:44:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:51,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:44:51,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 24 [2018-10-22 09:44:51,853 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:44:51,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 09:44:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 09:44:51,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2018-10-22 09:44:51,855 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 13 states. [2018-10-22 09:44:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:52,058 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-22 09:44:52,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 09:44:52,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-10-22 09:44:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:52,061 INFO L225 Difference]: With dead ends: 74 [2018-10-22 09:44:52,061 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 09:44:52,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 227 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2018-10-22 09:44:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 09:44:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-22 09:44:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 09:44:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-22 09:44:52,070 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 61 [2018-10-22 09:44:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:52,071 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-22 09:44:52,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 09:44:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-22 09:44:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 09:44:52,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:44:52,074 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:44:52,074 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:44:52,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:44:52,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1886366374, now seen corresponding path program 9 times [2018-10-22 09:44:52,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:44:52,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:52,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:44:52,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:44:52,078 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:44:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:44:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:44:52,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:44:52,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2018-10-22 09:44:52,337 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:44:52,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 09:44:52,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 09:44:52,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-22 09:44:52,338 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 19 states. [2018-10-22 09:44:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:44:52,579 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-22 09:44:52,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 09:44:52,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2018-10-22 09:44:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:44:52,581 INFO L225 Difference]: With dead ends: 68 [2018-10-22 09:44:52,581 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 09:44:52,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 09:44:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 09:44:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 09:44:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 09:44:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 09:44:52,584 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2018-10-22 09:44:52,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:44:52,584 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 09:44:52,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 09:44:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 09:44:52,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 09:44:52,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 09:44:52,890 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-10-22 09:44:52,899 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 09:44:52,900 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:44:52,900 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:44:52,900 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 09:44:52,900 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 09:44:52,900 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 09:44:52,900 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-10-22 09:44:52,900 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-10-22 09:44:52,900 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-22 09:44:52,901 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 09:44:52,901 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2018-10-22 09:44:52,901 INFO L425 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-10-22 09:44:52,901 INFO L425 ceAbstractionStarter]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2018-10-22 09:44:52,901 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2018-10-22 09:44:52,901 INFO L425 ceAbstractionStarter]: For program point L13-5(line 13) no Hoare annotation was computed. [2018-10-22 09:44:52,901 INFO L425 ceAbstractionStarter]: For program point L13-6(line 13) no Hoare annotation was computed. [2018-10-22 09:44:52,902 INFO L421 ceAbstractionStarter]: At program point L13-7(lines 13 15) the Hoare annotation is: (or (and (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6) (<= main_~sn~0 10)) (and (<= 1 main_~i~0) (<= main_~i~0 1) (<= main_~sn~0 0) (<= 0 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 4 main_~i~0) (<= main_~i~0 4)) (and (<= 7 main_~i~0) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= main_~i~0 7)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 3) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= 4 main_~sn~0)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14))) [2018-10-22 09:44:52,902 INFO L421 ceAbstractionStarter]: At program point L13-8(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2018-10-22 09:44:52,902 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 09:44:52,902 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 09:44:52,902 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:44:52,902 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 09:44:52,902 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 09:44:52,903 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:44:52,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:44:52 BoogieIcfgContainer [2018-10-22 09:44:52,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:44:52,919 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:44:52,919 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:44:52,919 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:44:52,920 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:44:43" (3/4) ... [2018-10-22 09:44:52,924 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 09:44:52,930 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 09:44:52,931 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 09:44:52,931 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 09:44:52,936 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-22 09:44:52,936 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-22 09:44:52,936 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 09:44:52,984 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:44:52,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:44:52,986 INFO L168 Benchmark]: Toolchain (without parser) took 10449.07 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 313.5 MB). Free memory was 953.2 MB in the beginning and 1.2 GB in the end (delta: -214.4 MB). Peak memory consumption was 99.1 MB. Max. memory is 11.5 GB. [2018-10-22 09:44:52,987 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:44:52,988 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.79 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:44:52,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.40 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:44:52,989 INFO L168 Benchmark]: Boogie Preprocessor took 27.29 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:44:52,991 INFO L168 Benchmark]: RCFGBuilder took 377.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -175.9 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-10-22 09:44:52,992 INFO L168 Benchmark]: TraceAbstraction took 9672.23 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.1 MB). Peak memory consumption was 120.6 MB. Max. memory is 11.5 GB. [2018-10-22 09:44:52,993 INFO L168 Benchmark]: Witness Printer took 66.07 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:44:52,999 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 269.79 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.40 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.29 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 377.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -175.9 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9672.23 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.1 MB). Peak memory consumption was 120.6 MB. Max. memory is 11.5 GB. * Witness Printer took 66.07 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((10 <= sn && 6 <= i) && i <= 6) && sn <= 10) || (((1 <= i && i <= 1) && sn <= 0) && 0 <= sn)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((6 <= sn && sn <= 6) && 4 <= i) && i <= 4)) || (((7 <= i && 12 <= sn) && sn <= 12) && i <= 7)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 3 && sn <= 4) && 3 <= i) && 4 <= sn)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 9.5s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 2.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 230 SDtfs, 129 SDslu, 1286 SDs, 0 SdLazy, 490 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1451 GetRequests, 1172 SyntacticMatches, 76 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 22 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1052 NumberOfCodeBlocks, 1050 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 1649 ConstructedInterpolants, 0 QuantifiedInterpolants, 261349 SizeOfPredicates, 128 NumberOfNonLiveVariables, 1056 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 43 InterpolantComputations, 3 PerfectInterpolantSequences, 234/3114 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...