./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-acceleration/const_true-unreach-call1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/loop-acceleration/const_true-unreach-call1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 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 0.1.24-0ed9222-m [2019-01-14 17:20:39,746 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-14 17:20:39,747 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-14 17:20:39,759 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-14 17:20:39,759 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-14 17:20:39,760 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-14 17:20:39,762 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-14 17:20:39,764 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-14 17:20:39,765 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-14 17:20:39,766 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-14 17:20:39,767 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-14 17:20:39,767 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-14 17:20:39,768 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-14 17:20:39,770 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-14 17:20:39,771 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-14 17:20:39,771 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-14 17:20:39,773 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-14 17:20:39,775 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-14 17:20:39,777 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-14 17:20:39,778 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-14 17:20:39,780 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-14 17:20:39,781 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-14 17:20:39,783 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-14 17:20:39,784 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-14 17:20:39,784 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-14 17:20:39,785 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-14 17:20:39,786 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-14 17:20:39,787 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-14 17:20:39,788 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-14 17:20:39,789 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-14 17:20:39,789 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-14 17:20:39,790 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-14 17:20:39,790 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-14 17:20:39,791 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-14 17:20:39,792 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-14 17:20:39,792 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-14 17:20:39,793 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-14 17:20:39,818 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-14 17:20:39,819 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-14 17:20:39,823 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-14 17:20:39,823 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-14 17:20:39,823 INFO L133 SettingsManager]: * Use SBE=true [2019-01-14 17:20:39,823 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-14 17:20:39,824 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-14 17:20:39,824 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-14 17:20:39,824 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-14 17:20:39,824 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-14 17:20:39,824 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-14 17:20:39,824 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-14 17:20:39,825 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-14 17:20:39,825 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-14 17:20:39,825 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-14 17:20:39,825 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-14 17:20:39,825 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-14 17:20:39,825 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-14 17:20:39,826 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-14 17:20:39,828 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-14 17:20:39,828 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-14 17:20:39,828 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-14 17:20:39,828 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-14 17:20:39,828 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-14 17:20:39,829 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-14 17:20:39,829 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-14 17:20:39,829 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-14 17:20:39,829 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 -> 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 [2019-01-14 17:20:39,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 17:20:39,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 17:20:39,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 17:20:39,911 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 17:20:39,912 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 17:20:39,912 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-acceleration/const_true-unreach-call1.i [2019-01-14 17:20:39,973 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26e7a7d2/8031a7524668473395aae6a4afeb1ad3/FLAG7159e02b0 [2019-01-14 17:20:40,425 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 17:20:40,426 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-acceleration/const_true-unreach-call1.i [2019-01-14 17:20:40,432 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26e7a7d2/8031a7524668473395aae6a4afeb1ad3/FLAG7159e02b0 [2019-01-14 17:20:40,796 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c26e7a7d2/8031a7524668473395aae6a4afeb1ad3 [2019-01-14 17:20:40,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 17:20:40,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-14 17:20:40,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 17:20:40,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 17:20:40,805 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 17:20:40,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 05:20:40" (1/1) ... [2019-01-14 17:20:40,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320e98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:40, skipping insertion in model container [2019-01-14 17:20:40,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 05:20:40" (1/1) ... [2019-01-14 17:20:40,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 17:20:40,832 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 17:20:40,975 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 17:20:40,979 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 17:20:40,991 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 17:20:41,003 INFO L195 MainTranslator]: Completed translation [2019-01-14 17:20:41,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41 WrapperNode [2019-01-14 17:20:41,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 17:20:41,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-14 17:20:41,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-14 17:20:41,005 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-14 17:20:41,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-14 17:20:41,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 17:20:41,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 17:20:41,037 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 17:20:41,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... [2019-01-14 17:20:41,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 17:20:41,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 17:20:41,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 17:20:41,056 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 17:20:41,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-01-14 17:20:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 17:20:41,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 17:20:41,312 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 17:20:41,313 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-14 17:20:41,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:20:41 BoogieIcfgContainer [2019-01-14 17:20:41,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 17:20:41,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-14 17:20:41,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-14 17:20:41,318 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-14 17:20:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.01 05:20:40" (1/3) ... [2019-01-14 17:20:41,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3958ab88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 05:20:41, skipping insertion in model container [2019-01-14 17:20:41,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:20:41" (2/3) ... [2019-01-14 17:20:41,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3958ab88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 05:20:41, skipping insertion in model container [2019-01-14 17:20:41,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:20:41" (3/3) ... [2019-01-14 17:20:41,321 INFO L112 eAbstractionObserver]: Analyzing ICFG const_true-unreach-call1.i [2019-01-14 17:20:41,330 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-14 17:20:41,336 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-14 17:20:41,350 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-14 17:20:41,375 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 17:20:41,376 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-14 17:20:41,376 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-14 17:20:41,376 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-14 17:20:41,376 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 17:20:41,376 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 17:20:41,377 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-14 17:20:41,377 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 17:20:41,377 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-14 17:20:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-01-14 17:20:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-14 17:20:41,396 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:20:41,397 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-14 17:20:41,399 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:20:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:20:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-01-14 17:20:41,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:20:41,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:20:41,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:41,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:20:41,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:20:41,711 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-01-14 17:20:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:20:41,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:20:41,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 17:20:41,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-14 17:20:41,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-14 17:20:41,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 17:20:41,737 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-01-14 17:20:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:20:41,785 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-01-14 17:20:41,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-14 17:20:41,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-01-14 17:20:41,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:20:41,797 INFO L225 Difference]: With dead ends: 17 [2019-01-14 17:20:41,797 INFO L226 Difference]: Without dead ends: 7 [2019-01-14 17:20:41,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 17:20:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-01-14 17:20:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-01-14 17:20:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-14 17:20:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-01-14 17:20:41,834 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-01-14 17:20:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:20:41,835 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-01-14 17:20:41,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-14 17:20:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-01-14 17:20:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-14 17:20:41,836 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:20:41,836 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-14 17:20:41,836 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:20:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:20:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-01-14 17:20:41,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:20:41,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:20:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:41,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:20:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:20:42,153 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2019-01-14 17:20:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:20:42,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 17:20:42,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-01-14 17:20:42,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:20:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:20:42,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:20:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:20:42,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:20:42,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-01-14 17:20:42,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-14 17:20:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-14 17:20:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-14 17:20:42,290 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-01-14 17:20:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:20:42,328 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-01-14 17:20:42,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-14 17:20:42,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-01-14 17:20:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:20:42,329 INFO L225 Difference]: With dead ends: 12 [2019-01-14 17:20:42,329 INFO L226 Difference]: Without dead ends: 8 [2019-01-14 17:20:42,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-14 17:20:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-14 17:20:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-01-14 17:20:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-14 17:20:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-01-14 17:20:42,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-01-14 17:20:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:20:42,334 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-01-14 17:20:42,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-14 17:20:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-01-14 17:20:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-14 17:20:42,334 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:20:42,335 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-14 17:20:42,335 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:20:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:20:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-01-14 17:20:42,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:20:42,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:20:42,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:42,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:20:42,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:20:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:20:42,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 17:20:42,540 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 17:20:42,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-01-14 17:20:42,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-01-14 17:20:42,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 17:20:42,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:20:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:20:42,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:20:42,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-01-14 17:20:42,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-14 17:20:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-14 17:20:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-01-14 17:20:42,678 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-01-14 17:20:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:20:42,734 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-01-14 17:20:42,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-14 17:20:42,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-01-14 17:20:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:20:42,736 INFO L225 Difference]: With dead ends: 13 [2019-01-14 17:20:42,736 INFO L226 Difference]: Without dead ends: 9 [2019-01-14 17:20:42,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-01-14 17:20:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-14 17:20:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-14 17:20:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-14 17:20:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-01-14 17:20:42,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-01-14 17:20:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:20:42,741 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-01-14 17:20:42,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-14 17:20:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-01-14 17:20:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-14 17:20:42,742 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:20:42,742 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-01-14 17:20:42,742 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:20:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:20:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-01-14 17:20:42,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:20:42,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:20:42,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:42,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 17:20:42,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:20:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:20:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:20:43,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 17:20:43,011 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-01-14 17:20:43,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-14 17:20:43,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-01-14 17:20:43,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 17:20:43,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:20:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-01-14 17:20:43,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-01-14 17:20:43,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2019-01-14 17:20:43,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-14 17:20:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-14 17:20:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-01-14 17:20:43,109 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2019-01-14 17:20:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:20:43,340 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-01-14 17:20:43,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-14 17:20:43,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-01-14 17:20:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:20:43,341 INFO L225 Difference]: With dead ends: 12 [2019-01-14 17:20:43,341 INFO L226 Difference]: Without dead ends: 0 [2019-01-14 17:20:43,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-01-14 17:20:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-14 17:20:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-14 17:20:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-14 17:20:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-14 17:20:43,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-01-14 17:20:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:20:43,344 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-14 17:20:43,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-14 17:20:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-14 17:20:43,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-14 17:20:43,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-14 17:20:43,398 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-01-14 17:20:43,398 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2019-01-14 17:20:43,399 INFO L444 ceAbstractionStarter]: At program point L11-2(lines 11 14) the Hoare annotation is: (or (= ULTIMATE.start_main_~x~0 0) (and (<= ULTIMATE.start_main_~y~0 0) (<= 0 ULTIMATE.start_main_~y~0))) [2019-01-14 17:20:43,399 INFO L448 ceAbstractionStarter]: For program point L11-3(lines 11 14) no Hoare annotation was computed. [2019-01-14 17:20:43,399 INFO L448 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2019-01-14 17:20:43,399 INFO L451 ceAbstractionStarter]: At program point L3-2(lines 1 16) the Hoare annotation is: true [2019-01-14 17:20:43,399 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-01-14 17:20:43,399 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-01-14 17:20:43,400 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2019-01-14 17:20:43,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.01 05:20:43 BoogieIcfgContainer [2019-01-14 17:20:43,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-14 17:20:43,411 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 17:20:43,411 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 17:20:43,411 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 17:20:43,411 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:20:41" (3/4) ... [2019-01-14 17:20:43,415 INFO L144 WitnessPrinter]: Generating witness for correct program [2019-01-14 17:20:43,424 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-01-14 17:20:43,424 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-01-14 17:20:43,465 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-14 17:20:43,465 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 17:20:43,466 INFO L168 Benchmark]: Toolchain (without parser) took 2666.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 952.7 MB in the beginning and 1.0 GB in the end (delta: -74.5 MB). Peak memory consumption was 66.6 MB. Max. memory is 11.5 GB. [2019-01-14 17:20:43,467 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:20:43,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.65 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-14 17:20:43,468 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:20:43,469 INFO L168 Benchmark]: Boogie Preprocessor took 18.75 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:20:43,469 INFO L168 Benchmark]: RCFGBuilder took 257.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2019-01-14 17:20:43,470 INFO L168 Benchmark]: TraceAbstraction took 2095.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 90.7 MB). Peak memory consumption was 90.7 MB. Max. memory is 11.5 GB. [2019-01-14 17:20:43,471 INFO L168 Benchmark]: Witness Printer took 54.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:20:43,475 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 202.65 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 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 32.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.75 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 257.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2095.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 90.7 MB). Peak memory consumption was 90.7 MB. Max. memory is 11.5 GB. * Witness Printer took 54.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. 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: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: x == 0 || (y <= 0 && 0 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 SDtfs, 1 SDslu, 23 SDs, 0 SdLazy, 52 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 34 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 47 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 878 SizeOfPredicates, 6 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...