./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cbmc-regression/float5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4353b03ed39dd917d13c7cd6163e83d6972334fc ................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4353b03ed39dd917d13c7cd6163e83d6972334fc ................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:20:09,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:20:09,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:20:09,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:20:09,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:20:09,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:20:09,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:20:09,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:20:09,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:20:09,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:20:09,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:20:09,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:20:09,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:20:09,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:20:09,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:20:09,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:20:09,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:20:09,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:20:09,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:20:09,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:20:09,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:20:09,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:20:09,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:20:09,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:20:09,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:20:09,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:20:09,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:20:09,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:20:09,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:20:09,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:20:09,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:20:09,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:20:09,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:20:09,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:20:09,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:20:09,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:20:09,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:20:09,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:20:09,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:20:09,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:20:09,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:20:09,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:20:09,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:20:09,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:20:09,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:20:09,567 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:20:09,567 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:20:09,567 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:20:09,567 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:20:09,567 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:20:09,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:20:09,567 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:20:09,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:20:09,568 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:20:09,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:20:09,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:20:09,568 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:20:09,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:20:09,569 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:20:09,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:20:09,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:20:09,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:20:09,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:20:09,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:20:09,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:20:09,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:20:09,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:20:09,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:20:09,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:20:09,571 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:20:09,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:20:09,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:20:09,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:20:09,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:20:09,571 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4353b03ed39dd917d13c7cd6163e83d6972334fc [2020-12-09 12:20:09,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:20:09,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:20:09,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:20:09,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:20:09,769 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:20:09,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float5.c [2020-12-09 12:20:09,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/b887dab67/5f339e964e3e4f55b11f3ae5034f7635/FLAGa78c0a3a9 [2020-12-09 12:20:10,177 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:20:10,177 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/sv-benchmarks/c/floats-cbmc-regression/float5.c [2020-12-09 12:20:10,181 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/b887dab67/5f339e964e3e4f55b11f3ae5034f7635/FLAGa78c0a3a9 [2020-12-09 12:20:10,191 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/b887dab67/5f339e964e3e4f55b11f3ae5034f7635 [2020-12-09 12:20:10,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:20:10,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:20:10,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:20:10,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:20:10,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:20:10,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2505a3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10, skipping insertion in model container [2020-12-09 12:20:10,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:20:10,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:20:10,315 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/sv-benchmarks/c/floats-cbmc-regression/float5.c[501,514] [2020-12-09 12:20:10,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:20:10,324 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:20:10,334 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/sv-benchmarks/c/floats-cbmc-regression/float5.c[501,514] [2020-12-09 12:20:10,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:20:10,344 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:20:10,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10 WrapperNode [2020-12-09 12:20:10,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:20:10,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:20:10,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:20:10,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:20:10,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:20:10,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:20:10,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:20:10,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:20:10,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... [2020-12-09 12:20:10,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:20:10,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:20:10,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:20:10,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:20:10,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/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 [2020-12-09 12:20:10,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:20:10,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:20:10,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:20:10,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:20:10,647 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:20:10,648 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 12:20:10,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:10 BoogieIcfgContainer [2020-12-09 12:20:10,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:20:10,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:20:10,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:20:10,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:20:10,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:20:10" (1/3) ... [2020-12-09 12:20:10,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d3a94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:10, skipping insertion in model container [2020-12-09 12:20:10,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:10" (2/3) ... [2020-12-09 12:20:10,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d3a94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:10, skipping insertion in model container [2020-12-09 12:20:10,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:10" (3/3) ... [2020-12-09 12:20:10,658 INFO L111 eAbstractionObserver]: Analyzing ICFG float5.c [2020-12-09 12:20:10,672 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:20:10,675 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 12:20:10,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 12:20:10,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:20:10,709 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:20:10,709 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:20:10,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:20:10,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:20:10,709 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:20:10,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:20:10,710 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:20:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-09 12:20:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 12:20:10,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:20:10,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 12:20:10,729 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:20:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:20:10,735 INFO L82 PathProgramCache]: Analyzing trace with hash 53240, now seen corresponding path program 1 times [2020-12-09 12:20:10,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:20:10,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297397363] [2020-12-09 12:20:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:20:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:20:10,819 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:20:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:20:10,832 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:20:10,846 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:20:10,847 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:20:10,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:20:10,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:20:10 BoogieIcfgContainer [2020-12-09 12:20:10,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:20:10,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:20:10,861 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:20:10,862 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:20:10,862 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:10" (3/4) ... [2020-12-09 12:20:10,864 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 12:20:10,865 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:20:10,866 INFO L168 Benchmark]: Toolchain (without parser) took 671.25 ms. Allocated memory is still 92.3 MB. Free memory was 52.8 MB in the beginning and 50.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2020-12-09 12:20:10,867 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 92.3 MB. Free memory is still 68.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:20:10,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 148.85 ms. Allocated memory is still 92.3 MB. Free memory was 52.6 MB in the beginning and 67.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:20:10,868 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.36 ms. Allocated memory is still 92.3 MB. Free memory was 67.1 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:20:10,869 INFO L168 Benchmark]: Boogie Preprocessor took 17.41 ms. Allocated memory is still 92.3 MB. Free memory was 65.8 MB in the beginning and 65.0 MB in the end (delta: 830.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:20:10,870 INFO L168 Benchmark]: RCFGBuilder took 260.19 ms. Allocated memory is still 92.3 MB. Free memory was 65.0 MB in the beginning and 62.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:20:10,870 INFO L168 Benchmark]: TraceAbstraction took 209.18 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 50.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 12:20:10,871 INFO L168 Benchmark]: Witness Printer took 3.31 ms. Allocated memory is still 92.3 MB. Free memory was 50.8 MB in the beginning and 50.4 MB in the end (delta: 414.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:20:10,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 92.3 MB. Free memory is still 68.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 148.85 ms. Allocated memory is still 92.3 MB. Free memory was 52.6 MB in the beginning and 67.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.36 ms. Allocated memory is still 92.3 MB. Free memory was 67.1 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.41 ms. Allocated memory is still 92.3 MB. Free memory was 65.8 MB in the beginning and 65.0 MB in the end (delta: 830.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 260.19 ms. Allocated memory is still 92.3 MB. Free memory was 65.0 MB in the beginning and 62.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 209.18 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 50.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.31 ms. Allocated memory is still 92.3 MB. Free memory was 50.8 MB in the beginning and 50.4 MB in the end (delta: 414.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 14, overapproximation of someBinaryDOUBLEComparisonOperation at line 10, overapproximation of someBinaryArithmeticFLOAToperation at line 12. Possible FailurePath: [L8] float a=__VERIFIER_nondet_float(), b=__VERIFIER_nondet_float(); [L8] float a=__VERIFIER_nondet_float(), b=__VERIFIER_nondet_float(); [L10] COND FALSE !(!(a==1 || a==0.5 || a==2 || a==3 || a==0.1)) [L11] b=a [L12] a/=2 [L13] a*=2 [L14] COND TRUE !(a==b) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:20:12,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:20:12,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:20:12,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:20:12,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:20:12,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:20:12,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:20:12,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:20:12,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:20:12,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:20:12,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:20:12,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:20:12,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:20:12,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:20:12,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:20:12,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:20:12,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:20:12,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:20:12,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:20:12,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:20:12,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:20:12,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:20:12,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:20:12,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:20:12,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:20:12,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:20:12,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:20:12,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:20:12,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:20:12,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:20:12,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:20:12,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:20:12,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:20:12,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:20:12,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:20:12,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:20:12,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:20:12,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:20:12,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:20:12,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:20:12,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:20:12,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 12:20:12,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:20:12,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:20:12,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:20:12,611 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:20:12,611 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:20:12,611 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:20:12,612 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:20:12,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:20:12,612 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:20:12,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:20:12,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:20:12,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:20:12,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:20:12,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:20:12,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:20:12,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:20:12,614 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:20:12,614 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 12:20:12,614 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 12:20:12,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:20:12,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:20:12,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:20:12,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:20:12,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:20:12,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 12:20:12,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:20:12,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:20:12,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:20:12,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:20:12,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:20:12,617 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 12:20:12,617 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 12:20:12,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:20:12,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:20:12,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:20:12,618 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4353b03ed39dd917d13c7cd6163e83d6972334fc [2020-12-09 12:20:12,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:20:12,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:20:12,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:20:12,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:20:12,862 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:20:12,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float5.c [2020-12-09 12:20:12,902 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/50c68c4ed/fe90fa3fa49f459e9183145752f6a479/FLAG2724f7c42 [2020-12-09 12:20:13,294 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:20:13,294 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/sv-benchmarks/c/floats-cbmc-regression/float5.c [2020-12-09 12:20:13,299 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/50c68c4ed/fe90fa3fa49f459e9183145752f6a479/FLAG2724f7c42 [2020-12-09 12:20:13,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/data/50c68c4ed/fe90fa3fa49f459e9183145752f6a479 [2020-12-09 12:20:13,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:20:13,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:20:13,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:20:13,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:20:13,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:20:13,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75da5e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13, skipping insertion in model container [2020-12-09 12:20:13,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:20:13,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:20:13,439 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/sv-benchmarks/c/floats-cbmc-regression/float5.c[501,514] [2020-12-09 12:20:13,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:20:13,453 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:20:13,471 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/sv-benchmarks/c/floats-cbmc-regression/float5.c[501,514] [2020-12-09 12:20:13,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:20:13,489 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:20:13,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13 WrapperNode [2020-12-09 12:20:13,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:20:13,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:20:13,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:20:13,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:20:13,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:20:13,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:20:13,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:20:13,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:20:13,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... [2020-12-09 12:20:13,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:20:13,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:20:13,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:20:13,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:20:13,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/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 [2020-12-09 12:20:13,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:20:13,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:20:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 12:20:13,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:20:14,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:20:14,409 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 12:20:14,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:14 BoogieIcfgContainer [2020-12-09 12:20:14,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:20:14,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:20:14,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:20:14,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:20:14,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:20:13" (1/3) ... [2020-12-09 12:20:14,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e414c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:14, skipping insertion in model container [2020-12-09 12:20:14,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:20:13" (2/3) ... [2020-12-09 12:20:14,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e414c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:20:14, skipping insertion in model container [2020-12-09 12:20:14,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:14" (3/3) ... [2020-12-09 12:20:14,415 INFO L111 eAbstractionObserver]: Analyzing ICFG float5.c [2020-12-09 12:20:14,424 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:20:14,426 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 12:20:14,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 12:20:14,450 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:20:14,450 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:20:14,450 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:20:14,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:20:14,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:20:14,450 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:20:14,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:20:14,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:20:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-09 12:20:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 12:20:14,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:20:14,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 12:20:14,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:20:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:20:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2020-12-09 12:20:14,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:20:14,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317662183] [2020-12-09 12:20:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 12:20:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:20:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 12:20:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:20:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:20:14,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:20:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317662183] [2020-12-09 12:20:14,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:20:14,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:20:14,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432160966] [2020-12-09 12:20:14,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:20:14,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:20:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:20:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:20:14,595 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 2 states. [2020-12-09 12:20:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:20:14,603 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-09 12:20:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:20:14,604 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 12:20:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:20:14,609 INFO L225 Difference]: With dead ends: 17 [2020-12-09 12:20:14,610 INFO L226 Difference]: Without dead ends: 7 [2020-12-09 12:20:14,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:20:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-09 12:20:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-09 12:20:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-09 12:20:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-09 12:20:14,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-09 12:20:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:20:14,636 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-09 12:20:14,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:20:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-09 12:20:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 12:20:14,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:20:14,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 12:20:14,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 12:20:14,837 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:20:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:20:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2020-12-09 12:20:14,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:20:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382164222] [2020-12-09 12:20:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 12:20:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:20:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 12:20:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:20:16,792 WARN L197 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-12-09 12:20:30,961 WARN L197 SmtUtils]: Spent 11.44 s on a formula simplification that was a NOOP. DAG size: 21 [2020-12-09 12:20:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:20:31,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:20:31,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382164222] [2020-12-09 12:20:31,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:20:31,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:20:31,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623435789] [2020-12-09 12:20:31,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:20:31,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:20:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:20:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:20:31,897 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 5 states. [2020-12-09 12:21:01,236 WARN L197 SmtUtils]: Spent 24.06 s on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-12-09 12:21:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:21:01,237 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-12-09 12:21:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 12:21:01,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 12:21:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:21:01,237 INFO L225 Difference]: With dead ends: 7 [2020-12-09 12:21:01,237 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 12:21:01,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:21:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 12:21:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 12:21:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 12:21:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 12:21:01,238 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-12-09 12:21:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:21:01,239 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 12:21:01,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:21:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 12:21:01,239 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 12:21:01,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 12:21:01,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 12:21:01,443 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 12:21:01,443 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 12:21:01,443 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 12:21:01,443 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 12:21:01,444 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2020-12-09 12:21:01,444 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-09 12:21:01,444 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-12-09 12:21:01,444 INFO L262 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-12-09 12:21:01,444 INFO L262 CegarLoopResult]: For program point L10-2(line 10) no Hoare annotation was computed. [2020-12-09 12:21:01,444 INFO L262 CegarLoopResult]: For program point L6(lines 6 15) no Hoare annotation was computed. [2020-12-09 12:21:01,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:21:01 BoogieIcfgContainer [2020-12-09 12:21:01,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:21:01,447 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:21:01,447 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:21:01,447 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:21:01,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:20:14" (3/4) ... [2020-12-09 12:21:01,450 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 12:21:01,456 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 12:21:01,456 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 12:21:01,456 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 12:21:01,456 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 12:21:01,477 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_57462d41-1e08-4b86-8a1b-55ec0654b295/bin/utaipan/witness.graphml [2020-12-09 12:21:01,477 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:21:01,478 INFO L168 Benchmark]: Toolchain (without parser) took 48166.40 ms. Allocated memory was 52.4 MB in the beginning and 88.1 MB in the end (delta: 35.7 MB). Free memory was 30.5 MB in the beginning and 45.7 MB in the end (delta: -15.2 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2020-12-09 12:21:01,478 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 34.7 MB in the beginning and 34.6 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:21:01,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.78 ms. Allocated memory was 52.4 MB in the beginning and 88.1 MB in the end (delta: 35.7 MB). Free memory was 30.2 MB in the beginning and 71.9 MB in the end (delta: -41.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-12-09 12:21:01,479 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.81 ms. Allocated memory is still 88.1 MB. Free memory was 71.9 MB in the beginning and 70.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:21:01,480 INFO L168 Benchmark]: Boogie Preprocessor took 17.59 ms. Allocated memory is still 88.1 MB. Free memory was 70.7 MB in the beginning and 69.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:21:01,480 INFO L168 Benchmark]: RCFGBuilder took 871.65 ms. Allocated memory is still 88.1 MB. Free memory was 69.5 MB in the beginning and 58.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 12:21:01,481 INFO L168 Benchmark]: TraceAbstraction took 47035.86 ms. Allocated memory is still 88.1 MB. Free memory was 57.7 MB in the beginning and 48.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2020-12-09 12:21:01,481 INFO L168 Benchmark]: Witness Printer took 29.84 ms. Allocated memory is still 88.1 MB. Free memory was 47.8 MB in the beginning and 45.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:21:01,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 34.7 MB in the beginning and 34.6 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 177.78 ms. Allocated memory was 52.4 MB in the beginning and 88.1 MB in the end (delta: 35.7 MB). Free memory was 30.2 MB in the beginning and 71.9 MB in the end (delta: -41.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.81 ms. Allocated memory is still 88.1 MB. Free memory was 71.9 MB in the beginning and 70.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.59 ms. Allocated memory is still 88.1 MB. Free memory was 70.7 MB in the beginning and 69.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 871.65 ms. Allocated memory is still 88.1 MB. Free memory was 69.5 MB in the beginning and 58.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47035.86 ms. Allocated memory is still 88.1 MB. Free memory was 57.7 MB in the beginning and 48.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. * Witness Printer took 29.84 ms. Allocated memory is still 88.1 MB. Free memory was 47.8 MB in the beginning and 45.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 46.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 29.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 1 SDslu, 1 SDs, 0 SdLazy, 6 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 380 SizeOfPredicates, 3 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...