./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i --full-output --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/loop-acceleration/underapprox_true-unreach-call2_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 2797de73b923a7fbf0f091cb97be1331c2699e2c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-21 12:34:19,764 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-21 12:34:19,766 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-21 12:34:19,784 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-21 12:34:19,785 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-21 12:34:19,787 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-21 12:34:19,790 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-21 12:34:19,793 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-21 12:34:19,796 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-21 12:34:19,799 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-21 12:34:19,802 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-21 12:34:19,802 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-21 12:34:19,804 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-21 12:34:19,805 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-21 12:34:19,806 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-21 12:34:19,806 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-21 12:34:19,810 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-21 12:34:19,814 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-21 12:34:19,823 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-21 12:34:19,827 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-21 12:34:19,828 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-21 12:34:19,830 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-21 12:34:19,832 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-21 12:34:19,833 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-21 12:34:19,833 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-21 12:34:19,834 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-21 12:34:19,835 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-21 12:34:19,836 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-21 12:34:19,837 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-21 12:34:19,838 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-21 12:34:19,838 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-21 12:34:19,839 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-21 12:34:19,839 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-21 12:34:19,840 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-21 12:34:19,841 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-21 12:34:19,842 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-21 12:34:19,842 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-21 12:34:19,867 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-21 12:34:19,868 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-21 12:34:19,871 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-21 12:34:19,872 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-21 12:34:19,872 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-21 12:34:19,872 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-21 12:34:19,872 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-21 12:34:19,872 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-21 12:34:19,873 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-21 12:34:19,873 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-21 12:34:19,873 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-21 12:34:19,874 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-21 12:34:19,874 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-21 12:34:19,875 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-21 12:34:19,875 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-21 12:34:19,875 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-21 12:34:19,875 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-21 12:34:19,875 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-21 12:34:19,875 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-21 12:34:19,876 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-21 12:34:19,876 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-21 12:34:19,876 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-21 12:34:19,876 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-21 12:34:19,876 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-21 12:34:19,877 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-21 12:34:19,878 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-21 12:34:19,878 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-21 12:34:19,878 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-21 12:34:19,878 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-21 12:34:19,879 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-21 12:34:19,879 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-21 12:34:19,879 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-21 12:34:19,879 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-21 12:34:19,879 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-21 12:34:19,879 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 -> 2797de73b923a7fbf0f091cb97be1331c2699e2c [2018-10-21 12:34:19,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-21 12:34:19,975 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-21 12:34:19,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-21 12:34:19,983 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-21 12:34:19,983 INFO L276 PluginConnector]: CDTParser initialized [2018-10-21 12:34:19,984 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-10-21 12:34:20,053 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bc32b038a/7bc0989dd35f4592af9231e0d16f251a/FLAGe7daf641d [2018-10-21 12:34:20,517 INFO L298 CDTParser]: Found 1 translation units. [2018-10-21 12:34:20,517 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-10-21 12:34:20,524 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bc32b038a/7bc0989dd35f4592af9231e0d16f251a/FLAGe7daf641d [2018-10-21 12:34:20,539 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bc32b038a/7bc0989dd35f4592af9231e0d16f251a [2018-10-21 12:34:20,544 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-21 12:34:20,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-21 12:34:20,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-21 12:34:20,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-21 12:34:20,550 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-21 12:34:20,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@928dc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20, skipping insertion in model container [2018-10-21 12:34:20,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-21 12:34:20,587 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-21 12:34:20,756 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:34:20,760 INFO L189 MainTranslator]: Completed pre-run [2018-10-21 12:34:20,777 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:34:20,793 INFO L193 MainTranslator]: Completed translation [2018-10-21 12:34:20,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20 WrapperNode [2018-10-21 12:34:20,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-21 12:34:20,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-21 12:34:20,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-21 12:34:20,795 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-21 12:34:20,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-21 12:34:20,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-21 12:34:20,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-21 12:34:20,819 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-21 12:34:20,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (1/1) ... [2018-10-21 12:34:20,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-21 12:34:20,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-21 12:34:20,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-21 12:34:20,839 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-21 12:34:20,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (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 [2018-10-21 12:34:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-21 12:34:20,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-21 12:34:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-21 12:34:20,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-21 12:34:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-21 12:34:20,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-21 12:34:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-21 12:34:20,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-21 12:34:21,160 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-21 12:34:21,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:34:21 BoogieIcfgContainer [2018-10-21 12:34:21,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-21 12:34:21,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-21 12:34:21,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-21 12:34:21,165 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-21 12:34:21,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 12:34:20" (1/3) ... [2018-10-21 12:34:21,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bad07b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:34:21, skipping insertion in model container [2018-10-21 12:34:21,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:34:20" (2/3) ... [2018-10-21 12:34:21,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bad07b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:34:21, skipping insertion in model container [2018-10-21 12:34:21,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:34:21" (3/3) ... [2018-10-21 12:34:21,169 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_true-unreach-call2_true-termination.i [2018-10-21 12:34:21,177 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-21 12:34:21,184 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-21 12:34:21,200 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-21 12:34:21,238 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-21 12:34:21,239 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-21 12:34:21,239 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-21 12:34:21,239 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-21 12:34:21,240 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-21 12:34:21,240 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-21 12:34:21,240 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-21 12:34:21,241 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-21 12:34:21,241 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-21 12:34:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-21 12:34:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-21 12:34:21,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:34:21,267 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:34:21,269 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:34:21,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:34:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-10-21 12:34:21,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:34:21,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:21,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:34:21,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:21,325 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:34:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:34:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:21,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:34:21,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-21 12:34:21,380 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:34:21,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-21 12:34:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-21 12:34:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-21 12:34:21,403 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-21 12:34:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:34:21,427 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-21 12:34:21,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-21 12:34:21,429 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-21 12:34:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:34:21,438 INFO L225 Difference]: With dead ends: 29 [2018-10-21 12:34:21,438 INFO L226 Difference]: Without dead ends: 12 [2018-10-21 12:34:21,442 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 [2018-10-21 12:34:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-21 12:34:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-21 12:34:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-21 12:34:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-21 12:34:21,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-21 12:34:21,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:34:21,482 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-21 12:34:21,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-21 12:34:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-21 12:34:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-21 12:34:21,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:34:21,483 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:34:21,483 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:34:21,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:34:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-10-21 12:34:21,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:34:21,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:21,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:34:21,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:21,485 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:34:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:34:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:21,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:34:21,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-21 12:34:21,647 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:34:21,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-21 12:34:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-21 12:34:21,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-21 12:34:21,650 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-21 12:34:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:34:21,704 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-21 12:34:21,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-21 12:34:21,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-21 12:34:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:34:21,713 INFO L225 Difference]: With dead ends: 19 [2018-10-21 12:34:21,713 INFO L226 Difference]: Without dead ends: 14 [2018-10-21 12:34:21,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-21 12:34:21,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-21 12:34:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-21 12:34:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-21 12:34:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-21 12:34:21,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-21 12:34:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:34:21,722 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-21 12:34:21,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-21 12:34:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-21 12:34:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-21 12:34:21,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:34:21,723 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:34:21,723 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:34:21,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:34:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-10-21 12:34:21,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:34:21,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:21,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:34:21,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:21,730 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:34:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:34:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:21,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:21,900 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:34:21,901 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-21 12:34:21,903 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [20], [23], [25], [31], [32], [33], [35] [2018-10-21 12:34:21,951 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:34:21,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:34:22,133 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-21 12:34:22,406 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-21 12:34:22,408 INFO L272 AbstractInterpreter]: Visited 12 different actions 67 times. Merged at 3 different actions 25 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-21 12:34:22,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:34:22,441 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-21 12:34:22,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:22,442 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 [2018-10-21 12:34:22,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:34:22,459 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:34:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:34:22,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:34:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:22,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:34:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:22,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:22,879 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 [2018-10-21 12:34:22,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:34:22,903 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:34:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:34:22,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:34:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:22,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:34:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:23,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:34:23,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 4, 4] total 11 [2018-10-21 12:34:23,199 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:34:23,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-21 12:34:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-21 12:34:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-21 12:34:23,201 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-10-21 12:34:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:34:23,219 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-21 12:34:23,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-21 12:34:23,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-21 12:34:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:34:23,221 INFO L225 Difference]: With dead ends: 21 [2018-10-21 12:34:23,221 INFO L226 Difference]: Without dead ends: 16 [2018-10-21 12:34:23,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-21 12:34:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-21 12:34:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-21 12:34:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-21 12:34:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-21 12:34:23,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-21 12:34:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:34:23,227 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-21 12:34:23,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-21 12:34:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-21 12:34:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-21 12:34:23,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:34:23,228 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:34:23,228 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:34:23,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:34:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-10-21 12:34:23,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:34:23,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:23,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:34:23,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:23,230 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:34:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:34:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:23,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:23,357 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:34:23,358 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:34:23,358 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:34:23,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:23,358 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 [2018-10-21 12:34:23,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:34:23,366 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:34:23,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:34:23,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:34:23,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:34:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:23,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:34:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:23,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:23,841 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 [2018-10-21 12:34:23,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:34:23,857 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:34:23,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:34:23,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:34:23,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:34:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:23,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:34:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:24,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:34:24,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 5, 5] total 14 [2018-10-21 12:34:24,040 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:34:24,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-21 12:34:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-21 12:34:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-21 12:34:24,042 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-10-21 12:34:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:34:24,071 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-21 12:34:24,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-21 12:34:24,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-21 12:34:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:34:24,073 INFO L225 Difference]: With dead ends: 23 [2018-10-21 12:34:24,073 INFO L226 Difference]: Without dead ends: 18 [2018-10-21 12:34:24,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-10-21 12:34:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-21 12:34:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-21 12:34:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-21 12:34:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-21 12:34:24,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-21 12:34:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:34:24,080 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-21 12:34:24,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-21 12:34:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-21 12:34:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-21 12:34:24,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:34:24,082 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:34:24,082 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:34:24,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:34:24,083 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 3 times [2018-10-21 12:34:24,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:34:24,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:24,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:34:24,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:34:24,084 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:34:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:34:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:34:24,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:24,502 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:34:24,502 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:34:24,502 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:34:24,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:34:24,502 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 [2018-10-21 12:34:24,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:34:24,520 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:34:24,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-21 12:34:24,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:34:24,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:34:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-21 12:34:24,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:34:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-21 12:34:24,839 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-21 12:34:24,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6] total 13 [2018-10-21 12:34:24,839 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:34:24,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-21 12:34:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-21 12:34:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-21 12:34:24,840 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-10-21 12:34:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:34:24,884 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-21 12:34:24,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-21 12:34:24,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-21 12:34:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:34:24,886 INFO L225 Difference]: With dead ends: 18 [2018-10-21 12:34:24,886 INFO L226 Difference]: Without dead ends: 0 [2018-10-21 12:34:24,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-21 12:34:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-21 12:34:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-21 12:34:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-21 12:34:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-21 12:34:24,888 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-10-21 12:34:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:34:24,888 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-21 12:34:24,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-21 12:34:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-21 12:34:24,888 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-21 12:34:24,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-21 12:34:24,947 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-21 12:34:24,947 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:34:24,947 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:34:24,948 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-21 12:34:24,948 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-21 12:34:24,948 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-21 12:34:24,948 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-10-21 12:34:24,948 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-10-21 12:34:24,949 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-10-21 12:34:24,949 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-10-21 12:34:24,949 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (or (and (<= main_~x~0 0) (<= 0 main_~x~0)) (< (mod (+ main_~x~0 4294967295) 4294967296) 6)) [2018-10-21 12:34:24,949 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 14) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 6) (<= 6 (mod main_~x~0 4294967296))) [2018-10-21 12:34:24,949 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-21 12:34:24,950 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-21 12:34:24,950 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-21 12:34:24,950 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-21 12:34:24,950 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-21 12:34:24,950 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-21 12:34:24,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 12:34:24 BoogieIcfgContainer [2018-10-21 12:34:24,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-21 12:34:24,962 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-21 12:34:24,962 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-21 12:34:24,963 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-21 12:34:24,963 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:34:21" (3/4) ... [2018-10-21 12:34:24,966 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-21 12:34:24,971 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-21 12:34:24,972 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-21 12:34:24,972 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-21 12:34:24,976 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-21 12:34:24,976 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-21 12:34:24,976 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:34:25,019 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-21 12:34:25,019 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-21 12:34:25,020 INFO L168 Benchmark]: Toolchain (without parser) took 4476.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 951.8 MB in the beginning and 956.7 MB in the end (delta: -4.9 MB). Peak memory consumption was 134.0 MB. Max. memory is 11.5 GB. [2018-10-21 12:34:25,022 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. [2018-10-21 12:34:25,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.44 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-21 12:34:25,024 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.03 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:34:25,024 INFO L168 Benchmark]: Boogie Preprocessor took 20.14 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:34:25,025 INFO L168 Benchmark]: RCFGBuilder took 322.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -181.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-10-21 12:34:25,026 INFO L168 Benchmark]: TraceAbstraction took 3799.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 963.5 MB in the end (delta: 159.3 MB). Peak memory consumption was 159.3 MB. Max. memory is 11.5 GB. [2018-10-21 12:34:25,026 INFO L168 Benchmark]: Witness Printer took 57.12 ms. Allocated memory is still 1.2 GB. Free memory was 963.5 MB in the beginning and 956.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-10-21 12:34:25,036 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 248.44 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 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 23.03 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.14 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 322.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -181.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3799.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 963.5 MB in the end (delta: 159.3 MB). Peak memory consumption was 159.3 MB. Max. memory is 11.5 GB. * Witness Printer took 57.12 ms. Allocated memory is still 1.2 GB. Free memory was 963.5 MB in the beginning and 956.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 11]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || (x + 4294967295) % 4294967296 < 6 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 3.7s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 2 SDslu, 81 SDs, 0 SdLazy, 37 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 33 HoareAnnotationTreeSize, 11 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 139 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 9621 SizeOfPredicates, 5 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 24/76 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...