./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e60c1dde74a24774e6b82459081106b30d3af9a9 .............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 13:27:09,469 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:27:09,471 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:27:09,479 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:27:09,479 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:27:09,480 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:27:09,481 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:27:09,482 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:27:09,483 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:27:09,483 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:27:09,484 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:27:09,484 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:27:09,485 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:27:09,485 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:27:09,486 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:27:09,487 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:27:09,487 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:27:09,488 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:27:09,490 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:27:09,491 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:27:09,491 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:27:09,492 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:27:09,494 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:27:09,494 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:27:09,494 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:27:09,494 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:27:09,495 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:27:09,496 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:27:09,496 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:27:09,497 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:27:09,497 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:27:09,497 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:27:09,498 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:27:09,498 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:27:09,498 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:27:09,499 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:27:09,499 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 13:27:09,509 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:27:09,509 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:27:09,509 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:27:09,510 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 13:27:09,510 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:27:09,510 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:27:09,510 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 13:27:09,510 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:27:09,511 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:27:09,512 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:27:09,512 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:27:09,512 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:27:09,512 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:27:09,512 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:27:09,512 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:27:09,512 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:27:09,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:27:09,513 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:27:09,513 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:27:09,513 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:27:09,513 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 13:27:09,513 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:27:09,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:27:09,513 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer 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 -> Automizer 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 -> e60c1dde74a24774e6b82459081106b30d3af9a9 [2018-11-18 13:27:09,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:27:09,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:27:09,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:27:09,549 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:27:09,549 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:27:09,550 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/../../sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.i [2018-11-18 13:27:09,591 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/data/e3eafccc5/a46d5d322df547d3ae5af8b049abb219/FLAG12132e485 [2018-11-18 13:27:09,915 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:27:09,916 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/sv-benchmarks/c/loop-acceleration/const_true-unreach-call1.i [2018-11-18 13:27:09,921 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/data/e3eafccc5/a46d5d322df547d3ae5af8b049abb219/FLAG12132e485 [2018-11-18 13:27:09,933 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/data/e3eafccc5/a46d5d322df547d3ae5af8b049abb219 [2018-11-18 13:27:09,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:27:09,936 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 13:27:09,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:27:09,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:27:09,940 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:27:09,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:27:09" (1/1) ... [2018-11-18 13:27:09,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24248849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:09, skipping insertion in model container [2018-11-18 13:27:09,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:27:09" (1/1) ... [2018-11-18 13:27:09,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:27:09,966 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:27:10,086 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:27:10,088 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:27:10,097 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:27:10,105 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:27:10,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10 WrapperNode [2018-11-18 13:27:10,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:27:10,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:27:10,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:27:10,106 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:27:10,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... [2018-11-18 13:27:10,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... [2018-11-18 13:27:10,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... [2018-11-18 13:27:10,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... [2018-11-18 13:27:10,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... [2018-11-18 13:27:10,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... [2018-11-18 13:27:10,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... [2018-11-18 13:27:10,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:27:10,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:27:10,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:27:10,123 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:27:10,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:27:10,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:27:10,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:27:10,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 13:27:10,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:27:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 13:27:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 13:27:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:27:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:27:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:27:10,287 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:27:10,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:27:10 BoogieIcfgContainer [2018-11-18 13:27:10,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:27:10,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:27:10,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:27:10,290 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:27:10,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:27:09" (1/3) ... [2018-11-18 13:27:10,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622de1b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:27:10, skipping insertion in model container [2018-11-18 13:27:10,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:27:10" (2/3) ... [2018-11-18 13:27:10,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622de1b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:27:10, skipping insertion in model container [2018-11-18 13:27:10,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:27:10" (3/3) ... [2018-11-18 13:27:10,292 INFO L112 eAbstractionObserver]: Analyzing ICFG const_true-unreach-call1.i [2018-11-18 13:27:10,298 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:27:10,302 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:27:10,310 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:27:10,328 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:27:10,328 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:27:10,328 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:27:10,329 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:27:10,329 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:27:10,329 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:27:10,329 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:27:10,329 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:27:10,329 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:27:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-11-18 13:27:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 13:27:10,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:27:10,344 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:27:10,346 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:27:10,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:27:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-11-18 13:27:10,351 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:27:10,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:27:10,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:27:10,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:27:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:27:10,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:27:10,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:27:10,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:27:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:27:10,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:27:10,428 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-11-18 13:27:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:27:10,441 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-11-18 13:27:10,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:27:10,442 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 13:27:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:27:10,448 INFO L225 Difference]: With dead ends: 29 [2018-11-18 13:27:10,448 INFO L226 Difference]: Without dead ends: 12 [2018-11-18 13:27:10,450 INFO L604 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 [2018-11-18 13:27:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-18 13:27:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-18 13:27:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-18 13:27:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-18 13:27:10,472 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-18 13:27:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:27:10,472 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-18 13:27:10,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:27:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-18 13:27:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 13:27:10,473 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:27:10,473 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:27:10,473 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:27:10,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:27:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-11-18 13:27:10,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:27:10,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:27:10,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:27:10,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:27:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:27:10,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:27:10,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:27:10,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:27:10,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:27:10,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:27:10,554 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-11-18 13:27:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:27:10,561 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-18 13:27:10,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:27:10,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 13:27:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:27:10,562 INFO L225 Difference]: With dead ends: 19 [2018-11-18 13:27:10,562 INFO L226 Difference]: Without dead ends: 14 [2018-11-18 13:27:10,562 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:27:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-18 13:27:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-18 13:27:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-18 13:27:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-18 13:27:10,564 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-18 13:27:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:27:10,565 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-18 13:27:10,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:27:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-18 13:27:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 13:27:10,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:27:10,565 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:27:10,565 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:27:10,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:27:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-11-18 13:27:10,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:27:10,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:27:10,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:27:10,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:27:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:27:10,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:27:10,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/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 [2018-11-18 13:27:10,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:27:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:27:10,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:27:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:27:10,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:27:10,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-18 13:27:10,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:27:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:27:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:27:10,711 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2018-11-18 13:27:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:27:10,724 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-18 13:27:10,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:27:10,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 13:27:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:27:10,725 INFO L225 Difference]: With dead ends: 21 [2018-11-18 13:27:10,725 INFO L226 Difference]: Without dead ends: 16 [2018-11-18 13:27:10,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:27:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-18 13:27:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-18 13:27:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-18 13:27:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-18 13:27:10,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-11-18 13:27:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:27:10,728 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-18 13:27:10,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:27:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-18 13:27:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:27:10,728 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:27:10,729 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:27:10,729 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:27:10,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:27:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-11-18 13:27:10,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:27:10,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:27:10,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:27:10,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:27:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:27:10,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:27:10,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:27:10,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:27:10,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:27:10,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:27:10,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:27:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:27:10,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:27:10,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-18 13:27:10,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:27:10,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:27:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:27:10,893 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2018-11-18 13:27:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:27:10,911 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-18 13:27:10,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:27:10,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-11-18 13:27:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:27:10,912 INFO L225 Difference]: With dead ends: 23 [2018-11-18 13:27:10,912 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 13:27:10,912 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:27:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 13:27:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 13:27:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 13:27:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-18 13:27:10,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-11-18 13:27:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:27:10,916 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-18 13:27:10,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:27:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-18 13:27:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 13:27:10,917 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:27:10,917 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:27:10,917 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:27:10,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:27:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 3 times [2018-11-18 13:27:10,917 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:27:10,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:27:10,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:27:10,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:27:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:27:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:27:10,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:27:10,998 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/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 [2018-11-18 13:27:11,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:27:11,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 13:27:11,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:27:11,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:27:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 13:27:11,070 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:27:11,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2018-11-18 13:27:11,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 13:27:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 13:27:11,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:27:11,071 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2018-11-18 13:27:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:27:11,140 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-11-18 13:27:11,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 13:27:11,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-11-18 13:27:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:27:11,141 INFO L225 Difference]: With dead ends: 23 [2018-11-18 13:27:11,141 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:27:11,142 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:27:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:27:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:27:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:27:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:27:11,143 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-11-18 13:27:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:27:11,143 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:27:11,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 13:27:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:27:11,143 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:27:11,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 13:27:11,170 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 13:27:11,170 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:27:11,170 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:27:11,170 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 13:27:11,170 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 13:27:11,170 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 13:27:11,171 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-11-18 13:27:11,171 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-11-18 13:27:11,171 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-11-18 13:27:11,171 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-11-18 13:27:11,171 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (or (= main_~x~0 0) (and (<= 0 main_~y~0) (<= main_~y~0 0))) [2018-11-18 13:27:11,171 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 14) the Hoare annotation is: (= main_~x~0 0) [2018-11-18 13:27:11,171 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-11-18 13:27:11,171 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-11-18 13:27:11,171 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-11-18 13:27:11,171 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-11-18 13:27:11,172 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-11-18 13:27:11,172 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-11-18 13:27:11,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:27:11 BoogieIcfgContainer [2018-11-18 13:27:11,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:27:11,181 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:27:11,181 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:27:11,181 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:27:11,182 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:27:10" (3/4) ... [2018-11-18 13:27:11,184 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:27:11,189 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:27:11,190 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:27:11,190 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 13:27:11,192 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 13:27:11,193 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 13:27:11,193 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:27:11,217 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_66670744-6333-4533-be37-36836a88c16d/bin-2019/uautomizer/witness.graphml [2018-11-18 13:27:11,217 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:27:11,218 INFO L168 Benchmark]: Toolchain (without parser) took 1282.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -91.9 MB). Peak memory consumption was 72.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:27:11,219 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:27:11,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.01 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:27:11,220 INFO L168 Benchmark]: Boogie Preprocessor took 16.40 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:27:11,220 INFO L168 Benchmark]: RCFGBuilder took 164.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -205.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2018-11-18 13:27:11,221 INFO L168 Benchmark]: TraceAbstraction took 892.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 97.1 MB). Peak memory consumption was 97.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:27:11,221 INFO L168 Benchmark]: Witness Printer took 36.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-18 13:27:11,223 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.01 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.40 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 164.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -205.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 892.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 97.1 MB). Peak memory consumption was 97.1 MB. Max. memory is 11.5 GB. * Witness Printer took 36.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: x == 0 || (0 <= y && y <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 64 SDtfs, 1 SDslu, 119 SDs, 0 SdLazy, 58 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s 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, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 17 NumberOfFragments, 19 HoareAnnotationTreeSize, 12 FomulaSimplifications, 34 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 111 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 4341 SizeOfPredicates, 4 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 12/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...