./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_poly.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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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 e0c4d229f60f1a19f1b80be7acb6ce64e15b5c4a ................................................................................................................................................................................................................................................... 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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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 e0c4d229f60f1a19f1b80be7acb6ce64e15b5c4a ................................................................................................................................................................................................................................................................................................................................................................................................. 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 10:40:04,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:40:04,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:40:04,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:40:04,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:40:04,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:40:04,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:40:04,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:40:04,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:40:04,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:40:04,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:40:04,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:40:04,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:40:04,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:40:04,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:40:04,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:40:04,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:40:04,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:40:04,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:40:04,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:40:04,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:40:04,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:40:04,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:40:04,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:40:04,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:40:04,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:40:04,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:40:04,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:40:04,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:40:04,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:40:04,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:40:04,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:40:04,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:40:04,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:40:04,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:40:04,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:40:04,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:40:04,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:40:04,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:40:04,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:40:04,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:40:04,429 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:40:04,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:40:04,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:40:04,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:40:04,447 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:40:04,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:40:04,448 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:40:04,448 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:40:04,448 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:40:04,454 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:40:04,454 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:40:04,454 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:40:04,455 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:40:04,455 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:40:04,455 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:40:04,455 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:40:04,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:40:04,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:40:04,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:40:04,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:40:04,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:40:04,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:40:04,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:40:04,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:40:04,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:40:04,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:40:04,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:40:04,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:40:04,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:40:04,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:40:04,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:40:04,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:40:04,458 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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c4d229f60f1a19f1b80be7acb6ce64e15b5c4a [2020-12-09 10:40:04,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:40:04,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:40:04,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:40:04,647 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:40:04,648 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:40:04,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly.c [2020-12-09 10:40:04,688 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/82be40b61/786f4178009847e8ac0e9d7845494f7e/FLAGdf03990a8 [2020-12-09 10:40:05,029 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:40:05,029 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/sv-benchmarks/c/float-benchs/sqrt_poly.c [2020-12-09 10:40:05,040 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/82be40b61/786f4178009847e8ac0e9d7845494f7e/FLAGdf03990a8 [2020-12-09 10:40:05,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/82be40b61/786f4178009847e8ac0e9d7845494f7e [2020-12-09 10:40:05,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:40:05,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:40:05,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:40:05,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:40:05,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:40:05,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543b9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05, skipping insertion in model container [2020-12-09 10:40:05,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:40:05,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:40:05,172 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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/sv-benchmarks/c/float-benchs/sqrt_poly.c[671,684] [2020-12-09 10:40:05,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:40:05,193 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:40:05,203 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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/sv-benchmarks/c/float-benchs/sqrt_poly.c[671,684] [2020-12-09 10:40:05,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:40:05,218 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:40:05,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05 WrapperNode [2020-12-09 10:40:05,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:40:05,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:40:05,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:40:05,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:40:05,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:40:05,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:40:05,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:40:05,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:40:05,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... [2020-12-09 10:40:05,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:40:05,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:40:05,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:40:05,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:40:05,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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 10:40:05,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:40:05,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:40:05,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:40:05,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:40:05,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:40:05,498 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 10:40:05,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:40:05 BoogieIcfgContainer [2020-12-09 10:40:05,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:40:05,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:40:05,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:40:05,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:40:05,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:40:05" (1/3) ... [2020-12-09 10:40:05,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a16b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:40:05, skipping insertion in model container [2020-12-09 10:40:05,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:05" (2/3) ... [2020-12-09 10:40:05,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a16b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:40:05, skipping insertion in model container [2020-12-09 10:40:05,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:40:05" (3/3) ... [2020-12-09 10:40:05,508 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly.c [2020-12-09 10:40:05,521 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:40:05,524 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:40:05,533 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:40:05,550 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:40:05,551 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:40:05,551 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:40:05,551 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:40:05,551 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:40:05,551 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:40:05,551 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:40:05,551 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:40:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-09 10:40:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 10:40:05,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:40:05,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 10:40:05,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:40:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:40:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash 65926, now seen corresponding path program 1 times [2020-12-09 10:40:05,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:40:05,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090348816] [2020-12-09 10:40:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:40:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:40:05,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:40:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:40:05,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:40:05,700 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 10:40:05,701 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 10:40:05,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:40:05,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:40:05 BoogieIcfgContainer [2020-12-09 10:40:05,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:40:05,719 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:40:05,719 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:40:05,719 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:40:05,719 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:40:05" (3/4) ... [2020-12-09 10:40:05,722 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 10:40:05,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:40:05,724 INFO L168 Benchmark]: Toolchain (without parser) took 663.37 ms. Allocated memory is still 102.8 MB. Free memory was 82.3 MB in the beginning and 76.7 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:05,724 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 81.8 MB. Free memory was 58.5 MB in the beginning and 58.4 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:40:05,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.58 ms. Allocated memory is still 102.8 MB. Free memory was 81.9 MB in the beginning and 72.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:05,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.23 ms. Allocated memory is still 102.8 MB. Free memory was 72.0 MB in the beginning and 70.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:40:05,726 INFO L168 Benchmark]: Boogie Preprocessor took 13.80 ms. Allocated memory is still 102.8 MB. Free memory was 70.8 MB in the beginning and 69.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:05,727 INFO L168 Benchmark]: RCFGBuilder took 242.60 ms. Allocated memory is still 102.8 MB. Free memory was 69.6 MB in the beginning and 52.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 10:40:05,727 INFO L168 Benchmark]: TraceAbstraction took 216.50 ms. Allocated memory is still 102.8 MB. Free memory was 52.1 MB in the beginning and 77.2 MB in the end (delta: -25.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:40:05,728 INFO L168 Benchmark]: Witness Printer took 3.36 ms. Allocated memory is still 102.8 MB. Free memory is still 76.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:40:05,732 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 81.8 MB. Free memory was 58.5 MB in the beginning and 58.4 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 158.58 ms. Allocated memory is still 102.8 MB. Free memory was 81.9 MB in the beginning and 72.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.23 ms. Allocated memory is still 102.8 MB. Free memory was 72.0 MB in the beginning and 70.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.80 ms. Allocated memory is still 102.8 MB. Free memory was 70.8 MB in the beginning and 69.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 242.60 ms. Allocated memory is still 102.8 MB. Free memory was 69.6 MB in the beginning and 52.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 216.50 ms. Allocated memory is still 102.8 MB. Free memory was 52.1 MB in the beginning and 77.2 MB in the end (delta: -25.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.36 ms. Allocated memory is still 102.8 MB. Free memory is still 76.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 25, overapproximation of someBinaryArithmeticDOUBLEoperation at line 27. Possible FailurePath: [L18] double sqrt2 = 1.414213538169860839843750; [L22] double S, I; [L24] I = __VERIFIER_nondet_double() [L14] COND FALSE !(!cond) [L27] COND FALSE !(I >= 2.) [L28] S = 1.+(I-1.) * (.5+(I-1.) * (-.125+(I-1.)*.0625)) [L16] COND TRUE !(cond) VAL [sqrt2=11863283/8388608] [L16] reach_error() VAL [sqrt2=11863283/8388608] - 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 10:40:07,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:40:07,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:40:07,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:40:07,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:40:07,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:40:07,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:40:07,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:40:07,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:40:07,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:40:07,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:40:07,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:40:07,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:40:07,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:40:07,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:40:07,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:40:07,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:40:07,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:40:07,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:40:07,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:40:07,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:40:07,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:40:07,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:40:07,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:40:07,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:40:07,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:40:07,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:40:07,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:40:07,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:40:07,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:40:07,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:40:07,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:40:07,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:40:07,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:40:07,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:40:07,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:40:07,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:40:07,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:40:07,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:40:07,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:40:07,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:40:07,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 10:40:07,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:40:07,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:40:07,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:40:07,389 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:40:07,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:40:07,389 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:40:07,389 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:40:07,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:40:07,389 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:40:07,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:40:07,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:40:07,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:40:07,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:40:07,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:40:07,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:40:07,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:40:07,391 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:40:07,391 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 10:40:07,391 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 10:40:07,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:40:07,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:40:07,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:40:07,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:40:07,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:40:07,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 10:40:07,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:40:07,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:40:07,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:40:07,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:40:07,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:40:07,393 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 10:40:07,393 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 10:40:07,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:40:07,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:40:07,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:40:07,394 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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c4d229f60f1a19f1b80be7acb6ce64e15b5c4a [2020-12-09 10:40:07,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:40:07,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:40:07,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:40:07,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:40:07,630 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:40:07,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly.c [2020-12-09 10:40:07,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/fc84797d8/6d3e0cee6e1d4baea1e28f2b4f84c7b3/FLAG7729962a6 [2020-12-09 10:40:08,070 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:40:08,071 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/sv-benchmarks/c/float-benchs/sqrt_poly.c [2020-12-09 10:40:08,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/fc84797d8/6d3e0cee6e1d4baea1e28f2b4f84c7b3/FLAG7729962a6 [2020-12-09 10:40:08,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/data/fc84797d8/6d3e0cee6e1d4baea1e28f2b4f84c7b3 [2020-12-09 10:40:08,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:40:08,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:40:08,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:40:08,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:40:08,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:40:08,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49663de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08, skipping insertion in model container [2020-12-09 10:40:08,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:40:08,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:40:08,221 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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/sv-benchmarks/c/float-benchs/sqrt_poly.c[671,684] [2020-12-09 10:40:08,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:40:08,247 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:40:08,265 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_4304f0b5-ed13-452f-9d46-a40bde5dc66b/sv-benchmarks/c/float-benchs/sqrt_poly.c[671,684] [2020-12-09 10:40:08,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:40:08,288 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:40:08,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08 WrapperNode [2020-12-09 10:40:08,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:40:08,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:40:08,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:40:08,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:40:08,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:40:08,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:40:08,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:40:08,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:40:08,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... [2020-12-09 10:40:08,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:40:08,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:40:08,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:40:08,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:40:08,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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 10:40:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 10:40:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:40:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:40:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:40:12,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:40:12,791 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 10:40:12,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:40:12 BoogieIcfgContainer [2020-12-09 10:40:12,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:40:12,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:40:12,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:40:12,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:40:12,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:40:08" (1/3) ... [2020-12-09 10:40:12,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14cc5cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:40:12, skipping insertion in model container [2020-12-09 10:40:12,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:40:08" (2/3) ... [2020-12-09 10:40:12,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14cc5cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:40:12, skipping insertion in model container [2020-12-09 10:40:12,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:40:12" (3/3) ... [2020-12-09 10:40:12,804 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly.c [2020-12-09 10:40:12,816 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:40:12,818 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:40:12,828 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:40:12,846 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:40:12,846 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:40:12,847 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:40:12,847 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:40:12,847 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:40:12,847 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:40:12,847 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:40:12,847 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:40:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 10:40:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:40:12,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:40:12,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:40:12,859 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:40:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:40:12,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1805028936, now seen corresponding path program 1 times [2020-12-09 10:40:12,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:40:12,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424710225] [2020-12-09 10:40:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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 10:40:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:40:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 10:40:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:40:13,602 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 10:40:13,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:40:13,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424710225] [2020-12-09 10:40:13,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:40:13,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:40:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803530789] [2020-12-09 10:40:13,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 10:40:13,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:40:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 10:40:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:40:13,621 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-09 10:40:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:40:13,631 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 10:40:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 10:40:13,632 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-09 10:40:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:40:13,638 INFO L225 Difference]: With dead ends: 21 [2020-12-09 10:40:13,638 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 10:40:13,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 10:40:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 10:40:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 10:40:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 10:40:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-09 10:40:13,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2020-12-09 10:40:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:40:13,665 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-09 10:40:13,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 10:40:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-09 10:40:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:40:13,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:40:13,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:40:13,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 10:40:13,868 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:40:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:40:13,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1806875978, now seen corresponding path program 1 times [2020-12-09 10:40:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:40:13,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474860791] [2020-12-09 10:40:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/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 10:40:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:40:15,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 10:40:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:40:15,820 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-09 10:40:18,021 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 2.0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (fp.geq ULTIMATE.start_main_~I~0 .cse0) (= (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 11863283.0 8388608.0)) (fp.add c_currentRoundingMode .cse1 (let ((.cse2 (fp.sub c_currentRoundingMode (fp.div c_currentRoundingMode ULTIMATE.start_main_~I~0 .cse0) .cse1))) (fp.mul c_currentRoundingMode .cse2 (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 2.0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 8.0)) .cse2)))))) c_ULTIMATE.start_main_~S~0) (fp.geq ULTIMATE.start_main_~I~0 .cse1) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) c_currentRoundingMode 3.0)))))) is different from false [2020-12-09 10:40:18,042 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 10:40:22,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 10:40:34,941 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (or (and (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0)) (.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse2 (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 11863283.0 8388608.0)) (fp.add roundNearestTiesToEven .cse0 (let ((.cse3 (fp.sub roundNearestTiesToEven (fp.div roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse1) .cse0))) (fp.mul roundNearestTiesToEven .cse3 (fp.sub roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0)) .cse3)))))))) (and (fp.geq ULTIMATE.start_main_~I~0 .cse0) (fp.geq ULTIMATE.start_main_~I~0 .cse1) (fp.geq .cse2 .cse0) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0)) (fp.leq .cse2 .cse1)))))) (and (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse6 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (not (fp.geq (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 11863283.0 8388608.0)) (fp.add roundNearestTiesToEven .cse4 (let ((.cse5 (fp.sub roundNearestTiesToEven (fp.div roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse6) .cse4))) (fp.mul roundNearestTiesToEven .cse5 (fp.sub roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0)) .cse5)))))) .cse4)) (fp.geq ULTIMATE.start_main_~I~0 .cse4) (fp.geq ULTIMATE.start_main_~I~0 .cse6) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))) .cse7) (and .cse7 (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse8 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse10 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (fp.geq ULTIMATE.start_main_~I~0 .cse8) (not (fp.leq (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 11863283.0 8388608.0)) (fp.add roundNearestTiesToEven .cse8 (let ((.cse9 (fp.sub roundNearestTiesToEven (fp.div roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse10) .cse8))) (fp.mul roundNearestTiesToEven .cse9 (fp.sub roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0)) .cse9)))))) .cse10)) (fp.geq ULTIMATE.start_main_~I~0 .cse10) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0)))))))) is different from false [2020-12-09 10:40:45,534 WARN L838 $PredicateComparison]: unable to prove that (or (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (not (fp.geq (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 11863283.0 8388608.0)) (fp.add roundNearestTiesToEven .cse0 (let ((.cse1 (fp.sub roundNearestTiesToEven (fp.div roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse2) .cse0))) (fp.mul roundNearestTiesToEven .cse1 (fp.sub roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0)) .cse1)))))) .cse0)) (fp.geq ULTIMATE.start_main_~I~0 .cse0) (fp.geq ULTIMATE.start_main_~I~0 .cse2) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))) (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (fp.leq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 3.0)) (fp.geq v_prenex_1 .cse3) (fp.geq v_prenex_1 .cse4) (not (fp.leq (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 11863283.0 8388608.0)) (fp.add roundNearestTiesToEven .cse3 (let ((.cse5 (fp.sub roundNearestTiesToEven (fp.div roundNearestTiesToEven v_prenex_1 .cse4) .cse3))) (fp.mul roundNearestTiesToEven .cse5 (fp.sub roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0)) .cse5)))))) .cse4)))))) is different from false [2020-12-09 10:40:47,623 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (not (fp.geq (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 11863283.0 8388608.0)) (fp.add roundNearestTiesToEven .cse0 (let ((.cse1 (fp.sub roundNearestTiesToEven (fp.div roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse2) .cse0))) (fp.mul roundNearestTiesToEven .cse1 (fp.sub roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0)) .cse1)))))) .cse0)) (fp.geq ULTIMATE.start_main_~I~0 .cse0) (fp.geq ULTIMATE.start_main_~I~0 .cse2) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))) (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (fp.leq v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 3.0)) (fp.geq v_prenex_1 .cse3) (fp.geq v_prenex_1 .cse4) (not (fp.leq (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 11863283.0 8388608.0)) (fp.add roundNearestTiesToEven .cse3 (let ((.cse5 (fp.sub roundNearestTiesToEven (fp.div roundNearestTiesToEven v_prenex_1 .cse4) .cse3))) (fp.mul roundNearestTiesToEven .cse5 (fp.sub roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0)) .cse5)))))) .cse4)))))) is different from true [2020-12-09 10:40:47,625 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 10:40:47,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:40:47,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474860791] [2020-12-09 10:40:47,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:40:47,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 10:40:47,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500584080] [2020-12-09 10:40:47,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 10:40:47,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:40:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 10:40:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=13, Unknown=4, NotChecked=24, Total=56 [2020-12-09 10:40:47,628 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2020-12-09 10:40:48,144 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2020-12-09 10:40:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:40:53,055 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2020-12-09 10:40:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 10:40:53,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-12-09 10:40:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:40:53,057 INFO L225 Difference]: With dead ends: 12 [2020-12-09 10:40:53,057 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 10:40:53,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=20, Invalid=18, Unknown=4, NotChecked=30, Total=72 [2020-12-09 10:40:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 10:40:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 10:40:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 10:40:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-12-09 10:40:53,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-12-09 10:40:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:40:53,060 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-12-09 10:40:53,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 10:40:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-12-09 10:40:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:40:53,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:40:53,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:40:53,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 10:40:53,263 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:40:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:40:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1806935560, now seen corresponding path program 1 times [2020-12-09 10:40:53,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 10:40:53,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853497543] [2020-12-09 10:40:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 10:40:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:40:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 10:40:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:40:59,752 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 10:41:02,039 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.geq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (fp.geq ULTIMATE.start_main_~I~0 .cse0) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) c_currentRoundingMode 3.0)) (= c_ULTIMATE.start_main_~S~0 (fp.add c_currentRoundingMode .cse0 (let ((.cse1 (fp.sub c_currentRoundingMode ULTIMATE.start_main_~I~0 .cse0))) (fp.mul c_currentRoundingMode .cse1 (fp.add c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 2.0)) (fp.mul c_currentRoundingMode .cse1 (fp.add c_currentRoundingMode (fp.neg ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 8.0))) (fp.mul c_currentRoundingMode .cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 16.0))))))))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2020-12-09 10:41:02,060 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 10:41:06,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 10:41:19,212 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (or (and (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0)) (.cse0 (fp.add roundNearestTiesToEven .cse2 (let ((.cse3 (fp.sub roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse2))) (fp.mul roundNearestTiesToEven .cse3 (fp.add roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven .cse3 (fp.add roundNearestTiesToEven (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0))) (fp.mul roundNearestTiesToEven .cse3 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 16.0))))))))))) (and (fp.leq .cse0 .cse1) (not (fp.geq ULTIMATE.start_main_~I~0 .cse1)) (fp.geq .cse0 .cse2) (fp.geq ULTIMATE.start_main_~I~0 .cse2) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))))) (and (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse5 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse4 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (not (fp.geq ULTIMATE.start_main_~I~0 .cse4)) (fp.geq ULTIMATE.start_main_~I~0 .cse5) (not (fp.leq (fp.add roundNearestTiesToEven .cse5 (let ((.cse6 (fp.sub roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse5))) (fp.mul roundNearestTiesToEven .cse6 (fp.add roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven .cse6 (fp.add roundNearestTiesToEven (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0))) (fp.mul roundNearestTiesToEven .cse6 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 16.0))))))))) .cse4)) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))) .cse7) (and (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse8 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (not (fp.geq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (fp.geq ULTIMATE.start_main_~I~0 .cse8) (not (fp.geq (fp.add roundNearestTiesToEven .cse8 (let ((.cse9 (fp.sub roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse8))) (fp.mul roundNearestTiesToEven .cse9 (fp.add roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven .cse9 (fp.add roundNearestTiesToEven (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0))) (fp.mul roundNearestTiesToEven .cse9 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 16.0))))))))) .cse8)) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))) .cse7))) is different from false [2020-12-09 10:41:29,930 WARN L838 $PredicateComparison]: unable to prove that (or (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (not (fp.geq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (fp.geq ULTIMATE.start_main_~I~0 .cse0) (not (fp.geq (fp.add roundNearestTiesToEven .cse0 (let ((.cse1 (fp.sub roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse0))) (fp.mul roundNearestTiesToEven .cse1 (fp.add roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven .cse1 (fp.add roundNearestTiesToEven (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0))) (fp.mul roundNearestTiesToEven .cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 16.0))))))))) .cse0)) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))) (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (fp.geq v_prenex_2 .cse2) (not (fp.geq v_prenex_2 .cse3)) (fp.leq v_prenex_2 ((_ to_fp 11 53) roundNearestTiesToEven 3.0)) (not (fp.leq (fp.add roundNearestTiesToEven .cse2 (let ((.cse4 (fp.sub roundNearestTiesToEven v_prenex_2 .cse2))) (fp.mul roundNearestTiesToEven .cse4 (fp.add roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven .cse4 (fp.add roundNearestTiesToEven (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0))) (fp.mul roundNearestTiesToEven .cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 16.0))))))))) .cse3)))))) is different from false [2020-12-09 10:41:32,006 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((ULTIMATE.start_main_~I~0 (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (not (fp.geq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (fp.geq ULTIMATE.start_main_~I~0 .cse0) (not (fp.geq (fp.add roundNearestTiesToEven .cse0 (let ((.cse1 (fp.sub roundNearestTiesToEven ULTIMATE.start_main_~I~0 .cse0))) (fp.mul roundNearestTiesToEven .cse1 (fp.add roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven .cse1 (fp.add roundNearestTiesToEven (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0))) (fp.mul roundNearestTiesToEven .cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 16.0))))))))) .cse0)) (fp.leq ULTIMATE.start_main_~I~0 ((_ to_fp 11 53) roundNearestTiesToEven 3.0))))) (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven 1.0)) (.cse3 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))) (and (fp.geq v_prenex_2 .cse2) (not (fp.geq v_prenex_2 .cse3)) (fp.leq v_prenex_2 ((_ to_fp 11 53) roundNearestTiesToEven 3.0)) (not (fp.leq (fp.add roundNearestTiesToEven .cse2 (let ((.cse4 (fp.sub roundNearestTiesToEven v_prenex_2 .cse2))) (fp.mul roundNearestTiesToEven .cse4 (fp.add roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 2.0)) (fp.mul roundNearestTiesToEven .cse4 (fp.add roundNearestTiesToEven (fp.neg ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 8.0))) (fp.mul roundNearestTiesToEven .cse4 ((_ to_fp 11 53) roundNearestTiesToEven (/ 1.0 16.0))))))))) .cse3)))))) is different from true [2020-12-09 10:41:32,007 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 10:41:32,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 10:41:32,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853497543] [2020-12-09 10:41:32,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:41:32,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 10:41:32,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954695109] [2020-12-09 10:41:32,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 10:41:32,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 10:41:32,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 10:41:32,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=13, Unknown=4, NotChecked=24, Total=56 [2020-12-09 10:41:32,010 INFO L87 Difference]: Start difference. First operand 8 states and 7 transitions. Second operand 8 states. [2020-12-09 10:41:32,630 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-12-09 10:41:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:41:34,904 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2020-12-09 10:41:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 10:41:35,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-12-09 10:41:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:41:35,018 INFO L225 Difference]: With dead ends: 8 [2020-12-09 10:41:35,018 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:41:35,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=20, Invalid=18, Unknown=4, NotChecked=30, Total=72 [2020-12-09 10:41:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:41:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:41:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:41:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:41:35,019 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-12-09 10:41:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:41:35,020 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:41:35,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 10:41:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:41:35,020 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:41:35,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 10:41:35,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L265 CegarLoopResult]: At program point L31(lines 20 32) the Hoare annotation is: true [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point L27-1(lines 27 28) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point L13(lines 27 28) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-09 10:41:35,283 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-09 10:41:35,284 INFO L265 CegarLoopResult]: At program point L16-3(line 16) the Hoare annotation is: true [2020-12-09 10:41:35,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:41:35 BoogieIcfgContainer [2020-12-09 10:41:35,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:41:35,289 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:41:35,289 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:41:35,289 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:41:35,289 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:40:12" (3/4) ... [2020-12-09 10:41:35,291 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:41:35,297 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-09 10:41:35,297 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-09 10:41:35,297 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:41:35,297 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:41:35,319 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4304f0b5-ed13-452f-9d46-a40bde5dc66b/bin/utaipan/witness.graphml [2020-12-09 10:41:35,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:41:35,320 INFO L168 Benchmark]: Toolchain (without parser) took 87228.57 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 42.2 MB in the beginning and 40.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2020-12-09 10:41:35,320 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 43.4 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:41:35,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.54 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 44.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:41:35,321 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.17 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 42.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:41:35,321 INFO L168 Benchmark]: Boogie Preprocessor took 20.11 ms. Allocated memory is still 60.8 MB. Free memory was 42.8 MB in the beginning and 41.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:41:35,322 INFO L168 Benchmark]: RCFGBuilder took 4456.74 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 29.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:41:35,322 INFO L168 Benchmark]: TraceAbstraction took 82494.38 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 29.2 MB in the beginning and 42.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:41:35,323 INFO L168 Benchmark]: Witness Printer took 30.68 ms. Allocated memory is still 77.6 MB. Free memory was 42.3 MB in the beginning and 40.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:41:35,325 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory was 43.4 MB in the beginning and 43.4 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 196.54 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 44.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.17 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 42.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.11 ms. Allocated memory is still 60.8 MB. Free memory was 42.8 MB in the beginning and 41.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4456.74 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 29.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 82494.38 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 29.2 MB in the beginning and 42.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Witness Printer took 30.68 ms. Allocated memory is still 77.6 MB. Free memory was 42.3 MB in the beginning and 40.2 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: 16]: 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 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 82.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 6 SDslu, 9 SDs, 0 SdLazy, 12 SolverSat, 0 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 8.2s SatisfiabilityAnalysisTime, 64.8s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 6 QuantifiedInterpolants, 6282 SizeOfPredicates, 15 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...