./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/count_up_down_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/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 --rcfgbuilder.size.of.a.code.block SingleStatement ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:40:47,506 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:40:47,510 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:40:47,523 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:40:47,523 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:40:47,525 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:40:47,526 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:40:47,528 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:40:47,530 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:40:47,531 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:40:47,532 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:40:47,533 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:40:47,534 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:40:47,535 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:40:47,536 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:40:47,537 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:40:47,538 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:40:47,540 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:40:47,543 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:40:47,545 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:40:47,546 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:40:47,547 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:40:47,550 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:40:47,551 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:40:47,551 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:40:47,552 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:40:47,553 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:40:47,554 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:40:47,556 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:40:47,557 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:40:47,557 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:40:47,558 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:40:47,558 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:40:47,559 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:40:47,561 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:40:47,562 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:40:47,562 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:40:47,594 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:40:47,597 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:40:47,598 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:40:47,598 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:40:47,598 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:40:47,598 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:40:47,598 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:40:47,599 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:40:47,599 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:40:47,599 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:40:47,599 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:40:47,604 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:40:47,604 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:40:47,604 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:40:47,604 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:40:47,605 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:40:47,606 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:40:47,606 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:40:47,607 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:40:47,607 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:40:47,607 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:40:47,607 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:40:47,607 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:40:47,607 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:40:47,608 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:40:47,609 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:40:47,609 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:40:47,610 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:40:47,610 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:40:47,610 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:40:47,610 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:40:47,610 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:40:47,610 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:40:47,611 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:40:47,613 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:40:47,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:40:47,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:40:47,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:40:47,703 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:40:47,704 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:40:47,704 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/count_up_down_true-unreach-call_true-termination.i [2018-10-22 09:40:47,770 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9ede808b5/cf30b7e1631640d7a1c6979bb21493eb/FLAGe12852c26 [2018-10-22 09:40:48,195 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:40:48,196 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down_true-unreach-call_true-termination.i [2018-10-22 09:40:48,203 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9ede808b5/cf30b7e1631640d7a1c6979bb21493eb/FLAGe12852c26 [2018-10-22 09:40:48,221 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9ede808b5/cf30b7e1631640d7a1c6979bb21493eb [2018-10-22 09:40:48,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:40:48,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:40:48,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:48,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:40:48,234 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:40:48,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bea5e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48, skipping insertion in model container [2018-10-22 09:40:48,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:40:48,276 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:40:48,482 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:48,488 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:40:48,508 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:48,527 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:40:48,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48 WrapperNode [2018-10-22 09:40:48,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:48,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:48,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:40:48,529 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:40:48,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:48,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:40:48,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:40:48,557 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:40:48,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... [2018-10-22 09:40:48,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:40:48,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:40:48,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:40:48,587 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:40:48,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:40:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:40:48,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:40:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:40:48,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:40:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:40:48,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:40:48,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:40:48,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:40:49,133 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:40:49,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:49 BoogieIcfgContainer [2018-10-22 09:40:49,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:40:49,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:40:49,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:40:49,140 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:40:49,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:40:48" (1/3) ... [2018-10-22 09:40:49,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354fbc5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:49, skipping insertion in model container [2018-10-22 09:40:49,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:48" (2/3) ... [2018-10-22 09:40:49,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354fbc5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:49, skipping insertion in model container [2018-10-22 09:40:49,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:49" (3/3) ... [2018-10-22 09:40:49,146 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_down_true-unreach-call_true-termination.i [2018-10-22 09:40:49,158 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:40:49,166 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:40:49,193 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:40:49,242 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:40:49,242 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:40:49,243 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:40:49,243 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:40:49,243 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:40:49,243 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:40:49,243 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:40:49,243 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:40:49,243 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:40:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-10-22 09:40:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 09:40:49,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:49,271 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:49,274 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:49,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:49,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1236818224, now seen corresponding path program 1 times [2018-10-22 09:40:49,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:49,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:49,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:49,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:49,333 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:49,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:49,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:40:49,402 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:49,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:40:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:40:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:40:49,421 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-10-22 09:40:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:49,445 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-10-22 09:40:49,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:40:49,447 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-10-22 09:40:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:49,456 INFO L225 Difference]: With dead ends: 38 [2018-10-22 09:40:49,457 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 09:40:49,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:40:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 09:40:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-22 09:40:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 09:40:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-22 09:40:49,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 13 [2018-10-22 09:40:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:49,511 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-22 09:40:49,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:40:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-22 09:40:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 09:40:49,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:49,512 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:49,512 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:49,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:49,515 INFO L82 PathProgramCache]: Analyzing trace with hash -113805549, now seen corresponding path program 1 times [2018-10-22 09:40:49,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:49,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:49,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:49,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:49,518 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:49,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:49,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-22 09:40:49,929 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:49,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 09:40:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 09:40:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-22 09:40:49,932 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2018-10-22 09:40:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:50,200 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-22 09:40:50,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 09:40:50,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-22 09:40:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:50,202 INFO L225 Difference]: With dead ends: 30 [2018-10-22 09:40:50,202 INFO L226 Difference]: Without dead ends: 25 [2018-10-22 09:40:50,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-22 09:40:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-22 09:40:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-10-22 09:40:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 09:40:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-22 09:40:50,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2018-10-22 09:40:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:50,216 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-22 09:40:50,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 09:40:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-22 09:40:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 09:40:50,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:50,217 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:50,218 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:50,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1380165636, now seen corresponding path program 1 times [2018-10-22 09:40:50,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:50,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:50,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:50,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:50,221 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:50,671 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-10-22 09:40:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:56,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:56,062 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:56,063 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-22 09:40:56,065 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [11], [15], [17], [18], [19], [20], [21], [22], [23], [29], [32], [34], [40], [41], [42], [44] [2018-10-22 09:40:56,120 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:40:56,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:40:56,251 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 09:40:56,499 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:40:56,501 INFO L272 AbstractInterpreter]: Visited 21 different actions 112 times. Merged at 9 different actions 63 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-22 09:40:56,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:56,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:40:56,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:56,545 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:40:56,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:56,558 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:40:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:56,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:56,896 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-22 09:40:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:57,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:06,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:06,956 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:41:06,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:41:06,973 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:41:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:41:07,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:07,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:07,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:41:07,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 11] total 31 [2018-10-22 09:41:07,322 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:41:07,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 09:41:07,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 09:41:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=819, Unknown=4, NotChecked=0, Total=930 [2018-10-22 09:41:07,327 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 18 states. [2018-10-22 09:41:16,432 WARN L179 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2018-10-22 09:41:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:41:16,588 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-22 09:41:16,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 09:41:16,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2018-10-22 09:41:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:41:16,591 INFO L225 Difference]: With dead ends: 38 [2018-10-22 09:41:16,591 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 09:41:16,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=180, Invalid=1220, Unknown=6, NotChecked=0, Total=1406 [2018-10-22 09:41:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 09:41:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-22 09:41:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 09:41:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-22 09:41:16,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 22 [2018-10-22 09:41:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:41:16,598 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-22 09:41:16,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 09:41:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-22 09:41:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 09:41:16,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:41:16,600 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:41:16,600 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:41:16,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:41:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1906982885, now seen corresponding path program 2 times [2018-10-22 09:41:16,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:41:16,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:16,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:41:16,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:16,602 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:41:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:41:17,247 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-22 09:41:21,744 WARN L179 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2018-10-22 09:41:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:22,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:22,223 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:41:22,223 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:41:22,223 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:41:22,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:22,223 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:41:22,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:41:22,232 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:41:22,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:41:22,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:41:22,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:29,626 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:39,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:39,803 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:41:39,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:41:39,821 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:41:39,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:41:39,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:41:39,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:40,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:41:40,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:41:40,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15, 15, 15] total 48 [2018-10-22 09:41:40,663 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:41:40,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 09:41:40,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 09:41:40,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2047, Unknown=1, NotChecked=0, Total=2256 [2018-10-22 09:41:40,666 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 27 states. [2018-10-22 09:41:47,530 WARN L179 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-10-22 09:41:55,225 WARN L179 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2018-10-22 09:42:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:42:01,609 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-10-22 09:42:01,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 09:42:01,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2018-10-22 09:42:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:42:01,611 INFO L225 Difference]: With dead ends: 42 [2018-10-22 09:42:01,611 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 09:42:01,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=447, Invalid=3841, Unknown=2, NotChecked=0, Total=4290 [2018-10-22 09:42:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 09:42:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 09:42:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 09:42:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 09:42:01,615 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2018-10-22 09:42:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:42:01,620 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 09:42:01,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 09:42:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 09:42:01,621 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 09:42:01,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 09:42:01,792 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-10-22 09:42:01,893 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 09:42:01,893 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:42:01,893 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:42:01,893 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 09:42:01,893 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 09:42:01,894 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 09:42:01,894 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 21) the Hoare annotation is: true [2018-10-22 09:42:01,894 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 21) no Hoare annotation was computed. [2018-10-22 09:42:01,894 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-10-22 09:42:01,894 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-22 09:42:01,894 INFO L425 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2018-10-22 09:42:01,894 INFO L425 ceAbstractionStarter]: For program point L17-1(line 17) no Hoare annotation was computed. [2018-10-22 09:42:01,895 INFO L425 ceAbstractionStarter]: For program point L18-2(line 18) no Hoare annotation was computed. [2018-10-22 09:42:01,895 INFO L425 ceAbstractionStarter]: For program point L17-2(line 17) no Hoare annotation was computed. [2018-10-22 09:42:01,895 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-22 09:42:01,895 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-10-22 09:42:01,895 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 09:42:01,895 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-10-22 09:42:01,895 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 21) no Hoare annotation was computed. [2018-10-22 09:42:01,896 INFO L421 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (or (and (= main_~n~0 (+ main_~x~0 1)) (<= 1 main_~y~0) (<= (+ (* 4294967296 (div main_~n~0 4294967296)) 1) main_~n~0) (<= main_~y~0 1)) (and (<= 0 main_~y~0) (= main_~x~0 main_~n~0) (<= main_~y~0 0)) (let ((.cse0 (+ main_~x~0 main_~y~0))) (and (<= main_~n~0 .cse0) (<= main_~n~0 (+ (* 4294967296 (div (+ main_~n~0 (- main_~y~0)) 4294967296)) 4294967295)) (<= .cse0 main_~n~0) (<= 2 main_~y~0)))) [2018-10-22 09:42:01,896 INFO L421 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (let ((.cse2 (* 4294967296 (div (+ main_~n~0 (- main_~y~0)) 4294967296)))) (let ((.cse0 (<= main_~n~0 (+ .cse2 main_~y~0)))) (or (and (<= 0 main_~y~0) .cse0 (= main_~x~0 main_~n~0) (<= main_~y~0 0)) (let ((.cse1 (+ main_~x~0 main_~y~0))) (and (<= main_~n~0 .cse1) (<= main_~n~0 (+ .cse2 4294967295)) .cse0 (<= .cse1 main_~n~0) (<= 2 main_~y~0))) (and (= main_~n~0 (+ main_~x~0 1)) (<= 1 main_~y~0) (<= (mod (+ main_~n~0 4294967295) 4294967296) 0) (<= main_~y~0 1))))) [2018-10-22 09:42:01,896 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 09:42:01,896 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:42:01,897 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 09:42:01,897 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 09:42:01,897 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 09:42:01,897 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:42:01,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:42:01 BoogieIcfgContainer [2018-10-22 09:42:01,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:42:01,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:42:01,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:42:01,914 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:42:01,915 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:49" (3/4) ... [2018-10-22 09:42:01,918 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 09:42:01,923 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 09:42:01,924 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 09:42:01,924 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 09:42:01,929 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-10-22 09:42:01,929 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-22 09:42:01,929 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 09:42:01,977 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:42:01,977 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:42:01,978 INFO L168 Benchmark]: Toolchain (without parser) took 73750.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 951.8 MB in the beginning and 842.3 MB in the end (delta: 109.5 MB). Peak memory consumption was 316.1 MB. Max. memory is 11.5 GB. [2018-10-22 09:42:01,980 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:42:01,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.25 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. [2018-10-22 09:42:01,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.18 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. [2018-10-22 09:42:01,981 INFO L168 Benchmark]: Boogie Preprocessor took 29.44 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. [2018-10-22 09:42:01,982 INFO L168 Benchmark]: RCFGBuilder took 547.78 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: -179.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:42:01,983 INFO L168 Benchmark]: TraceAbstraction took 72777.88 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 850.0 MB in the end (delta: 270.8 MB). Peak memory consumption was 338.5 MB. Max. memory is 11.5 GB. [2018-10-22 09:42:01,984 INFO L168 Benchmark]: Witness Printer took 63.69 ms. Allocated memory is still 1.2 GB. Free memory was 850.0 MB in the beginning and 842.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:42:01,989 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 298.25 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 28.18 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 29.44 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 547.78 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: -179.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 72777.88 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 850.0 MB in the end (delta: 270.8 MB). Peak memory consumption was 338.5 MB. Max. memory is 11.5 GB. * Witness Printer took 63.69 ms. Allocated memory is still 1.2 GB. Free memory was 850.0 MB in the beginning and 842.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.7 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 + 1 && 1 <= y) && 4294967296 * (n / 4294967296) + 1 <= n) && y <= 1) || ((0 <= y && x == n) && y <= 0)) || (((n <= x + y && n <= 4294967296 * ((n + -y) / 4294967296) + 4294967295) && x + y <= n) && 2 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 72.6s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 30.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 76 SDtfs, 61 SDslu, 330 SDs, 0 SdLazy, 349 SolverSat, 22 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 144 SyntacticMatches, 18 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 61.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=3, 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 18 NumberOfFragments, 143 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 52 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 40.8s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 275 ConstructedInterpolants, 0 QuantifiedInterpolants, 76213 SizeOfPredicates, 40 NumberOfNonLiveVariables, 184 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 7/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...