./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ................................................................................................................................................................................................................................................. 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_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ............................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:39:32,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:39:32,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:39:32,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:39:32,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:39:32,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:39:32,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:39:32,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:39:32,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:39:32,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:39:32,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:39:32,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:39:32,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:39:32,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:39:32,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:39:32,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:39:32,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:39:32,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:39:32,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:39:32,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:39:32,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:39:32,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:39:32,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:39:32,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:39:32,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:39:32,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:39:32,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:39:32,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:39:32,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:39:32,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:39:32,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:39:32,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:39:32,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:39:32,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:39:32,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:39:32,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:39:32,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:39:32,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:39:32,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:39:32,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:39:32,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:39:32,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:39:32,359 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:39:32,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:39:32,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:39:32,361 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:39:32,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:39:32,362 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:39:32,362 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:39:32,362 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:39:32,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:39:32,363 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:39:32,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:39:32,364 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:39:32,364 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:39:32,364 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:39:32,365 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:39:32,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:39:32,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:39:32,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:39:32,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:39:32,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:39:32,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:39:32,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:39:32,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:39:32,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:39:32,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:39:32,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:39:32,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:39:32,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:39:32,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:39:32,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:39:32,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:39:32,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:39:32,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:39:32,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:39:32,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:39:32,370 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:39:32,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:39:32,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:39:32,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:39:32,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:39:32,372 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_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2020-11-28 07:39:32,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:39:32,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:39:32,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:39:32,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:39:32,657 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:39:32,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/../../sv-benchmarks/c/floats-cdfpl/square_3.i [2020-11-28 07:39:32,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/feadbd01d/9aded96b426046f4a5b303ee5e1a052f/FLAGff5bbcb4b [2020-11-28 07:39:33,147 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:39:33,148 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/sv-benchmarks/c/floats-cdfpl/square_3.i [2020-11-28 07:39:33,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/feadbd01d/9aded96b426046f4a5b303ee5e1a052f/FLAGff5bbcb4b [2020-11-28 07:39:33,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/feadbd01d/9aded96b426046f4a5b303ee5e1a052f [2020-11-28 07:39:33,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:39:33,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:39:33,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:33,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:39:33,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:39:33,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b85b92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33, skipping insertion in model container [2020-11-28 07:39:33,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:39:33,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:39:33,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:33,772 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:39:33,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:33,801 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:39:33,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33 WrapperNode [2020-11-28 07:39:33,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:33,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:33,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:39:33,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:39:33,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:33,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:39:33,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:39:33,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:39:33,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... [2020-11-28 07:39:33,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:39:33,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:39:33,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:39:33,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:39:33,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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 [2020-11-28 07:39:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:39:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:39:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:39:33,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:39:34,229 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:39:34,230 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-28 07:39:34,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:34 BoogieIcfgContainer [2020-11-28 07:39:34,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:39:34,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:39:34,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:39:34,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:39:34,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:39:33" (1/3) ... [2020-11-28 07:39:34,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3a7b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:34, skipping insertion in model container [2020-11-28 07:39:34,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:33" (2/3) ... [2020-11-28 07:39:34,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3a7b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:34, skipping insertion in model container [2020-11-28 07:39:34,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:34" (3/3) ... [2020-11-28 07:39:34,239 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2020-11-28 07:39:34,250 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:39:34,253 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:39:34,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:39:34,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:39:34,319 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:39:34,320 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:39:34,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:39:34,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:39:34,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:39:34,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:39:34,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:39:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-11-28 07:39:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:39:34,335 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:34,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:39:34,336 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:34,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1918701, now seen corresponding path program 1 times [2020-11-28 07:39:34,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:34,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118456341] [2020-11-28 07:39:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:39:34,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:39:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:39:34,466 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:39:34,486 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:39:34,486 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:39:34,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:39:34,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:39:34 BoogieIcfgContainer [2020-11-28 07:39:34,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:39:34,508 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:39:34,508 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:39:34,508 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:39:34,509 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:34" (3/4) ... [2020-11-28 07:39:34,512 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:39:34,512 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:39:34,515 INFO L168 Benchmark]: Toolchain (without parser) took 959.83 ms. Allocated memory is still 96.5 MB. Free memory was 67.5 MB in the beginning and 45.1 MB in the end (delta: 22.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:34,516 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 53.3 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:34,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.70 ms. Allocated memory is still 96.5 MB. Free memory was 67.5 MB in the beginning and 74.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:34,518 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.50 ms. Allocated memory is still 96.5 MB. Free memory was 74.8 MB in the beginning and 73.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:34,518 INFO L168 Benchmark]: Boogie Preprocessor took 17.19 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:34,519 INFO L168 Benchmark]: RCFGBuilder took 382.07 ms. Allocated memory is still 96.5 MB. Free memory was 72.3 MB in the beginning and 57.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:34,520 INFO L168 Benchmark]: TraceAbstraction took 273.48 ms. Allocated memory is still 96.5 MB. Free memory was 57.1 MB in the beginning and 45.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:34,521 INFO L168 Benchmark]: Witness Printer took 4.53 ms. Allocated memory is still 96.5 MB. Free memory was 45.4 MB in the beginning and 45.1 MB in the end (delta: 368.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:34,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 53.3 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 241.70 ms. Allocated memory is still 96.5 MB. Free memory was 67.5 MB in the beginning and 74.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.50 ms. Allocated memory is still 96.5 MB. Free memory was 74.8 MB in the beginning and 73.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.19 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 382.07 ms. Allocated memory is still 96.5 MB. Free memory was 72.3 MB in the beginning and 57.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 273.48 ms. Allocated memory is still 96.5 MB. Free memory was 57.1 MB in the beginning and 45.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.53 ms. Allocated memory is still 96.5 MB. Free memory was 45.4 MB in the beginning and 45.1 MB in the end (delta: 368.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39843f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_3.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 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=7occurred 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, 4 NumberOfCodeBlocks, 4 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-a4ecdab [2020-11-28 07:39:37,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:39:37,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:39:37,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:39:37,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:39:37,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:39:37,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:39:37,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:39:37,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:39:37,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:39:37,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:39:37,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:39:37,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:39:37,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:39:37,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:39:37,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:39:37,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:39:37,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:39:37,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:39:37,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:39:37,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:39:37,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:39:37,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:39:37,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:39:37,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:39:37,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:39:37,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:39:37,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:39:37,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:39:37,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:39:37,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:39:37,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:39:37,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:39:37,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:39:37,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:39:37,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:39:37,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:39:37,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:39:37,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:39:37,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:39:37,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:39:37,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-28 07:39:37,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:39:37,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:39:37,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:39:37,283 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:39:37,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:39:37,283 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:39:37,284 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:39:37,284 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:39:37,284 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:39:37,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:39:37,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:39:37,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:39:37,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:39:37,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:39:37,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:39:37,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:39:37,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:39:37,286 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:39:37,287 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:39:37,287 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:39:37,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:39:37,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:39:37,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:39:37,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:39:37,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:39:37,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:39:37,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:39:37,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:39:37,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:39:37,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:39:37,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:39:37,290 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:39:37,290 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:39:37,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:39:37,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:39:37,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:39:37,291 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_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2020-11-28 07:39:37,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:39:37,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:39:37,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:39:37,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:39:37,714 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:39:37,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/../../sv-benchmarks/c/floats-cdfpl/square_3.i [2020-11-28 07:39:37,799 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/9082777dd/11e0a91c864c4d11a2f4a5e0ca1de9d8/FLAGb5afe3f8b [2020-11-28 07:39:38,418 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:39:38,418 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/sv-benchmarks/c/floats-cdfpl/square_3.i [2020-11-28 07:39:38,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/9082777dd/11e0a91c864c4d11a2f4a5e0ca1de9d8/FLAGb5afe3f8b [2020-11-28 07:39:38,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/data/9082777dd/11e0a91c864c4d11a2f4a5e0ca1de9d8 [2020-11-28 07:39:38,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:39:38,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:39:38,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:38,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:39:38,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:39:38,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:38,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee5e405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38, skipping insertion in model container [2020-11-28 07:39:38,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:38,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:39:38,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:39:38,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:38,952 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:39:38,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:38,990 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:39:38,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38 WrapperNode [2020-11-28 07:39:38,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:38,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:38,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:39:38,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:39:39,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:39,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:39:39,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:39:39,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:39:39,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... [2020-11-28 07:39:39,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:39:39,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:39:39,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:39:39,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:39:39,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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 [2020-11-28 07:39:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:39:39,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:39:39,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:39:39,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:39:41,558 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:39:41,558 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-28 07:39:41,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:41 BoogieIcfgContainer [2020-11-28 07:39:41,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:39:41,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:39:41,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:39:41,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:39:41,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:39:38" (1/3) ... [2020-11-28 07:39:41,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b482bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:41, skipping insertion in model container [2020-11-28 07:39:41,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:38" (2/3) ... [2020-11-28 07:39:41,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b482bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:41, skipping insertion in model container [2020-11-28 07:39:41,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:41" (3/3) ... [2020-11-28 07:39:41,569 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2020-11-28 07:39:41,583 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:39:41,588 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:39:41,602 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:39:41,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:39:41,631 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:39:41,631 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:39:41,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:39:41,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:39:41,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:39:41,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:39:41,632 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:39:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-28 07:39:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:39:41,649 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:41,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:41,650 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-11-28 07:39:41,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:39:41,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832472768] [2020-11-28 07:39:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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 [2020-11-28 07:39:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 07:39:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:39:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:42,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:39:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832472768] [2020-11-28 07:39:42,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:42,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 07:39:42,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75382630] [2020-11-28 07:39:42,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:39:42,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:39:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:39:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:39:42,375 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-28 07:39:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:42,392 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-28 07:39:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:39:42,393 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-28 07:39:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:42,401 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:39:42,401 INFO L226 Difference]: Without dead ends: 8 [2020-11-28 07:39:42,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:39:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-28 07:39:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-28 07:39:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 07:39:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-11-28 07:39:42,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-11-28 07:39:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:42,439 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-11-28 07:39:42,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:39:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-11-28 07:39:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:39:42,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:42,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:42,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:39:42,654 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:39:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-11-28 07:39:42,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:39:42,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974480882] [2020-11-28 07:39:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/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 [2020-11-28 07:39:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:39:49,476 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:40:00,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:40:00,826 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-28 07:40:00,827 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:40:01,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:40:01,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:40:01 BoogieIcfgContainer [2020-11-28 07:40:01,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:40:01,053 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:40:01,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:40:01,054 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:40:01,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:41" (3/4) ... [2020-11-28 07:40:01,056 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:40:01,120 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26e867d5-57ae-44f0-b3e4-f1a6f5c72842/bin/utaipan/witness.graphml [2020-11-28 07:40:01,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:40:01,128 INFO L168 Benchmark]: Toolchain (without parser) took 22394.18 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 44.5 MB in the beginning and 54.7 MB in the end (delta: -10.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:01,130 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 62.9 MB. Free memory is still 45.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:40:01,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.13 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 34.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:01,133 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.93 ms. Allocated memory is still 62.9 MB. Free memory was 34.2 MB in the beginning and 32.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:01,134 INFO L168 Benchmark]: Boogie Preprocessor took 27.96 ms. Allocated memory is still 62.9 MB. Free memory was 32.7 MB in the beginning and 31.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:01,138 INFO L168 Benchmark]: RCFGBuilder took 2501.30 ms. Allocated memory is still 62.9 MB. Free memory was 31.5 MB in the beginning and 37.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:01,140 INFO L168 Benchmark]: TraceAbstraction took 19490.69 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 37.3 MB in the beginning and 56.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:01,142 INFO L168 Benchmark]: Witness Printer took 66.91 ms. Allocated memory is still 86.0 MB. Free memory was 56.4 MB in the beginning and 54.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:40:01,148 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 62.9 MB. Free memory is still 45.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 263.13 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 34.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.93 ms. Allocated memory is still 62.9 MB. Free memory was 34.2 MB in the beginning and 32.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.96 ms. Allocated memory is still 62.9 MB. Free memory was 32.7 MB in the beginning and 31.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2501.30 ms. Allocated memory is still 62.9 MB. Free memory was 31.5 MB in the beginning and 37.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19490.69 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 37.3 MB in the beginning and 56.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Witness Printer took 66.91 ms. Allocated memory is still 86.0 MB. Free memory was 56.4 MB in the beginning and 54.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39843f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_3.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 7.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...