./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/count_up_down_true-unreach-call_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/loops/count_up_down_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 b37ffbbc4572f61f8e88c551dd4e5228bb86f8a0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:24:59,110 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-21 12:24:59,114 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-21 12:24:59,132 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-21 12:24:59,132 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-21 12:24:59,133 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-21 12:24:59,135 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-21 12:24:59,137 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-21 12:24:59,141 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-21 12:24:59,145 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-21 12:24:59,146 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-21 12:24:59,147 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-21 12:24:59,147 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-21 12:24:59,148 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-21 12:24:59,149 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-21 12:24:59,151 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-21 12:24:59,152 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-21 12:24:59,154 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-21 12:24:59,157 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-21 12:24:59,158 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-21 12:24:59,159 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-21 12:24:59,161 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-21 12:24:59,163 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-21 12:24:59,163 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-21 12:24:59,164 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-21 12:24:59,165 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-21 12:24:59,166 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-21 12:24:59,166 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-21 12:24:59,167 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-21 12:24:59,168 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-21 12:24:59,169 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-21 12:24:59,169 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-21 12:24:59,170 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-21 12:24:59,170 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-21 12:24:59,171 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-21 12:24:59,171 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-21 12:24:59,172 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-21 12:24:59,203 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-21 12:24:59,206 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-21 12:24:59,210 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-21 12:24:59,210 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-21 12:24:59,210 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-21 12:24:59,211 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-21 12:24:59,211 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-21 12:24:59,211 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-21 12:24:59,211 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-21 12:24:59,212 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-21 12:24:59,212 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-21 12:24:59,214 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-21 12:24:59,214 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-21 12:24:59,214 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-21 12:24:59,214 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-21 12:24:59,214 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-21 12:24:59,215 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-21 12:24:59,215 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-21 12:24:59,215 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-21 12:24:59,215 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-21 12:24:59,215 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-21 12:24:59,215 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-21 12:24:59,217 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-21 12:24:59,217 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-21 12:24:59,217 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-21 12:24:59,218 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-21 12:24:59,218 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-21 12:24:59,218 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-21 12:24:59,218 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-21 12:24:59,218 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-21 12:24:59,218 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-21 12:24:59,219 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-21 12:24:59,219 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-21 12:24:59,219 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-21 12:24:59,219 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 -> b37ffbbc4572f61f8e88c551dd4e5228bb86f8a0 [2018-10-21 12:24:59,305 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-21 12:24:59,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-21 12:24:59,330 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-21 12:24:59,331 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-21 12:24:59,332 INFO L276 PluginConnector]: CDTParser initialized [2018-10-21 12:24:59,333 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/count_up_down_true-unreach-call_true-termination.i [2018-10-21 12:24:59,396 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5a22a9e59/1c54606ae1644601b880949b74282eca/FLAG750c3ecfe [2018-10-21 12:24:59,905 INFO L298 CDTParser]: Found 1 translation units. [2018-10-21 12:24:59,906 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down_true-unreach-call_true-termination.i [2018-10-21 12:24:59,914 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5a22a9e59/1c54606ae1644601b880949b74282eca/FLAG750c3ecfe [2018-10-21 12:24:59,935 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5a22a9e59/1c54606ae1644601b880949b74282eca [2018-10-21 12:24:59,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-21 12:24:59,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-21 12:24:59,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-21 12:24:59,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-21 12:24:59,948 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-21 12:24:59,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:24:59" (1/1) ... [2018-10-21 12:24:59,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788d8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:24:59, skipping insertion in model container [2018-10-21 12:24:59,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:24:59" (1/1) ... [2018-10-21 12:24:59,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-21 12:24:59,993 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-21 12:25:00,205 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:25:00,209 INFO L189 MainTranslator]: Completed pre-run [2018-10-21 12:25:00,229 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:25:00,249 INFO L193 MainTranslator]: Completed translation [2018-10-21 12:25:00,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00 WrapperNode [2018-10-21 12:25:00,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-21 12:25:00,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-21 12:25:00,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-21 12:25:00,251 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-21 12:25:00,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-21 12:25:00,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-21 12:25:00,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-21 12:25:00,277 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-21 12:25:00,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (1/1) ... [2018-10-21 12:25:00,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-21 12:25:00,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-21 12:25:00,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-21 12:25:00,310 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-21 12:25:00,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (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 12:25:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-21 12:25:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-21 12:25:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-21 12:25:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-21 12:25:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-21 12:25:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-21 12:25:00,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-21 12:25:00,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-21 12:25:00,726 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-21 12:25:00,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:25:00 BoogieIcfgContainer [2018-10-21 12:25:00,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-21 12:25:00,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-21 12:25:00,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-21 12:25:00,732 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-21 12:25:00,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 12:24:59" (1/3) ... [2018-10-21 12:25:00,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64382b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:25:00, skipping insertion in model container [2018-10-21 12:25:00,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:25:00" (2/3) ... [2018-10-21 12:25:00,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64382b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:25:00, skipping insertion in model container [2018-10-21 12:25:00,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:25:00" (3/3) ... [2018-10-21 12:25:00,738 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_down_true-unreach-call_true-termination.i [2018-10-21 12:25:00,748 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-21 12:25:00,756 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-21 12:25:00,773 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-21 12:25:00,807 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-21 12:25:00,808 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-21 12:25:00,808 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-21 12:25:00,809 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-21 12:25:00,809 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-21 12:25:00,809 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-21 12:25:00,809 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-21 12:25:00,809 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-21 12:25:00,809 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-21 12:25:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-21 12:25:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-21 12:25:00,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:25:00,836 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:25:00,838 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:25:00,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:25:00,845 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-10-21 12:25:00,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:25:00,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:00,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:25:00,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:00,900 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:25:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:25:00,965 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 12:25:00,968 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:25:00,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-21 12:25:00,968 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:25:00,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-21 12:25:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-21 12:25:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-21 12:25:00,993 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-21 12:25:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:25:01,017 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-21 12:25:01,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-21 12:25:01,018 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-21 12:25:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:25:01,028 INFO L225 Difference]: With dead ends: 29 [2018-10-21 12:25:01,028 INFO L226 Difference]: Without dead ends: 12 [2018-10-21 12:25:01,032 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 12:25:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-21 12:25:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-21 12:25:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-21 12:25:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-21 12:25:01,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-21 12:25:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:25:01,076 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-21 12:25:01,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-21 12:25:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-21 12:25:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-21 12:25:01,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:25:01,077 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:25:01,078 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:25:01,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:25:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-10-21 12:25:01,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:25:01,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:01,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:25:01,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:01,080 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:25:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:25:01,301 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-21 12:25:01,473 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 12:25:01,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:25:01,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-21 12:25:01,474 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:25:01,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-21 12:25:01,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-21 12:25:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-21 12:25:01,477 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2018-10-21 12:25:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:25:01,633 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-21 12:25:01,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-21 12:25:01,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-21 12:25:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:25:01,635 INFO L225 Difference]: With dead ends: 19 [2018-10-21 12:25:01,635 INFO L226 Difference]: Without dead ends: 14 [2018-10-21 12:25:01,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-21 12:25:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-21 12:25:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-21 12:25:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-21 12:25:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-21 12:25:01,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-21 12:25:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:25:01,642 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-21 12:25:01,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-21 12:25:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-21 12:25:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-21 12:25:01,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:25:01,643 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:25:01,644 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:25:01,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:25:01,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-10-21 12:25:01,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:25:01,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:01,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:25:01,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:01,646 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:25:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:25:02,119 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 12:25:02,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:25:02,120 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:25:02,121 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-21 12:25:02,123 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [20], [23], [25], [31], [32], [33], [35] [2018-10-21 12:25:02,172 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:25:02,173 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:25:02,297 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-21 12:25:02,529 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-21 12:25:02,531 INFO L272 AbstractInterpreter]: Visited 12 different actions 61 times. Merged at 3 different actions 21 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-21 12:25:02,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:25:02,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-21 12:25:02,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:25:02,549 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 12:25:02,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:25:02,560 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:25:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:25:02,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:25:02,790 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 12:25:02,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:25:03,197 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 12:25:03,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:25:03,220 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 12:25:03,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:25:03,239 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:25:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:25:03,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:25:03,388 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 12:25:03,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:25:03,408 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 12:25:03,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:25:03,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 15 [2018-10-21 12:25:03,411 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:25:03,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-21 12:25:03,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-21 12:25:03,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-10-21 12:25:03,413 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2018-10-21 12:25:03,546 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-10-21 12:25:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:25:05,972 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-10-21 12:25:05,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-21 12:25:05,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-10-21 12:25:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:25:05,974 INFO L225 Difference]: With dead ends: 24 [2018-10-21 12:25:05,974 INFO L226 Difference]: Without dead ends: 18 [2018-10-21 12:25:05,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-10-21 12:25:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-21 12:25:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-21 12:25:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-21 12:25:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-21 12:25:05,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2018-10-21 12:25:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:25:05,980 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-21 12:25:05,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-21 12:25:05,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-21 12:25:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-21 12:25:05,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:25:05,981 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:25:05,982 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:25:05,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:25:05,982 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 2 times [2018-10-21 12:25:05,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:25:05,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:05,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:25:05,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:25:05,984 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:25:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:25:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:25:06,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:25:06,300 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:25:06,300 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:25:06,300 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:25:06,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:25:06,301 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 12:25:06,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:25:06,321 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:25:06,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:25:06,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:25:06,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:25:06,766 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-21 12:25:06,987 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 12:25:06,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:25:07,460 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 12:25:07,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:25:07,481 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 12:25:07,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:25:07,497 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:25:07,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:25:07,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:25:07,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:25:07,580 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 12:25:07,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:25:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (5)] Exception during sending of exit command (exit): Broken pipe [2018-10-21 12:25:07,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:25:07,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-21 12:25:07,602 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:25:07,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-21 12:25:07,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-21 12:25:07,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:25:07,604 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2018-10-21 12:25:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:25:08,026 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-21 12:25:08,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-21 12:25:08,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2018-10-21 12:25:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:25:08,030 INFO L225 Difference]: With dead ends: 21 [2018-10-21 12:25:08,030 INFO L226 Difference]: Without dead ends: 0 [2018-10-21 12:25:08,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2018-10-21 12:25:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-21 12:25:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-21 12:25:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-21 12:25:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-21 12:25:08,032 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-10-21 12:25:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:25:08,032 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-21 12:25:08,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-21 12:25:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-21 12:25:08,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-21 12:25:08,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-21 12:25:08,233 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2018-10-21 12:25:08,340 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 19 [2018-10-21 12:25:08,345 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-21 12:25:08,345 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:25:08,346 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:25:08,346 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-21 12:25:08,346 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-21 12:25:08,346 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-21 12:25:08,346 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 21) the Hoare annotation is: true [2018-10-21 12:25:08,348 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 21) no Hoare annotation was computed. [2018-10-21 12:25:08,348 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-10-21 12:25:08,348 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 21) no Hoare annotation was computed. [2018-10-21 12:25:08,348 INFO L421 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (or (let ((.cse0 (+ main_~x~0 main_~y~0))) (and (<= main_~n~0 .cse0) (<= 1 main_~y~0) (<= .cse0 main_~n~0) (<= (* 4294967296 (div main_~n~0 4294967296)) main_~x~0))) (and (<= 0 main_~y~0) (= main_~x~0 main_~n~0) (<= main_~y~0 0))) [2018-10-21 12:25:08,350 INFO L421 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div (+ main_~n~0 (- main_~y~0)) 4294967296)))) (let ((.cse2 (<= main_~n~0 (+ .cse1 main_~y~0)))) (or (let ((.cse0 (+ main_~x~0 main_~y~0))) (and (<= main_~n~0 .cse0) (<= 1 main_~y~0) (<= main_~n~0 (+ .cse1 4294967295)) .cse2 (<= .cse0 main_~n~0))) (and (<= 0 main_~y~0) .cse2 (= main_~x~0 main_~n~0) (<= main_~y~0 0))))) [2018-10-21 12:25:08,350 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-21 12:25:08,350 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-21 12:25:08,351 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:25:08,351 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-21 12:25:08,351 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-21 12:25:08,351 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:25:08,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 12:25:08 BoogieIcfgContainer [2018-10-21 12:25:08,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-21 12:25:08,365 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-21 12:25:08,365 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-21 12:25:08,365 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-21 12:25:08,366 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:25:00" (3/4) ... [2018-10-21 12:25:08,370 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-21 12:25:08,377 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-21 12:25:08,378 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-21 12:25:08,378 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-21 12:25:08,382 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-10-21 12:25:08,382 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-21 12:25:08,383 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:25:08,426 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-21 12:25:08,426 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-21 12:25:08,427 INFO L168 Benchmark]: Toolchain (without parser) took 8486.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 951.9 MB in the beginning and 878.1 MB in the end (delta: 73.7 MB). Peak memory consumption was 213.2 MB. Max. memory is 11.5 GB. [2018-10-21 12:25:08,428 INFO L168 Benchmark]: CDTParser took 0.21 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 12:25:08,429 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.36 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 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 12:25:08,429 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.34 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 12:25:08,430 INFO L168 Benchmark]: Boogie Preprocessor took 32.46 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 12:25:08,430 INFO L168 Benchmark]: RCFGBuilder took 416.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -183.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-21 12:25:08,431 INFO L168 Benchmark]: TraceAbstraction took 7636.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 879.9 MB in the end (delta: 244.6 MB). Peak memory consumption was 244.6 MB. Max. memory is 11.5 GB. [2018-10-21 12:25:08,432 INFO L168 Benchmark]: Witness Printer took 60.75 ms. Allocated memory is still 1.2 GB. Free memory was 879.9 MB in the beginning and 878.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2018-10-21 12:25:08,437 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 307.36 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 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 26.34 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 32.46 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 416.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -183.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7636.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 879.9 MB in the end (delta: 244.6 MB). Peak memory consumption was 244.6 MB. Max. memory is 11.5 GB. * Witness Printer took 60.75 ms. Allocated memory is still 1.2 GB. Free memory was 879.9 MB in the beginning and 878.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 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: 15]: Loop Invariant Derived loop invariant: (((n <= x + y && 1 <= y) && x + y <= n) && 4294967296 * (n / 4294967296) <= x) || ((0 <= y && x == n) && y <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 7.5s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 14 SDslu, 165 SDs, 0 SdLazy, 107 SolverSat, 5 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.2s 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, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 21 NumberOfFragments, 98 HoareAnnotationTreeSize, 12 FomulaSimplifications, 29 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 161 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 17209 SizeOfPredicates, 14 NumberOfNonLiveVariables, 156 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 6/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...