./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f17fe8c9c038caf356703f241998bd5fc14538d .................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:32:59,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:32:59,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:32:59,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:32:59,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:32:59,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:32:59,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:32:59,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:32:59,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:32:59,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:32:59,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:32:59,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:32:59,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:32:59,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:32:59,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:32:59,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:32:59,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:32:59,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:32:59,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:32:59,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:32:59,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:32:59,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:32:59,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:32:59,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:32:59,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:32:59,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:32:59,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:32:59,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:32:59,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:32:59,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:32:59,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:32:59,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:32:59,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:32:59,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:32:59,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:32:59,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:32:59,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:32:59,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:32:59,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:32:59,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:32:59,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:32:59,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-12-03 12:32:59,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:32:59,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:32:59,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:32:59,277 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:32:59,277 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:32:59,277 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:32:59,277 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:32:59,278 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:32:59,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:32:59,278 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:32:59,279 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:32:59,279 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:32:59,280 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:32:59,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:32:59,280 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:32:59,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:32:59,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:32:59,282 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:32:59,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:32:59,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:32:59,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:32:59,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:32:59,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:32:59,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:32:59,283 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:32:59,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:32:59,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:32:59,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:32:59,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:32:59,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:32:59,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:32:59,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:32:59,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:32:59,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:32:59,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:32:59,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:32:59,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:32:59,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:32:59,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:32:59,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:32:59,289 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_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f17fe8c9c038caf356703f241998bd5fc14538d [2020-12-03 12:32:59,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:32:59,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:32:59,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:32:59,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:32:59,639 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:32:59,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2020-12-03 12:32:59,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/data/6a0834cc2/55ce5220e9084631b886bc0e03a8c8fa/FLAG71c035b1e [2020-12-03 12:33:00,230 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:33:00,231 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/sv-benchmarks/c/bitvector/num_conversion_2.c [2020-12-03 12:33:00,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/data/6a0834cc2/55ce5220e9084631b886bc0e03a8c8fa/FLAG71c035b1e [2020-12-03 12:33:00,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/bin/utaipan/data/6a0834cc2/55ce5220e9084631b886bc0e03a8c8fa [2020-12-03 12:33:00,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:33:00,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:33:00,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:33:00,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:33:00,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:33:00,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3947bab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00, skipping insertion in model container [2020-12-03 12:33:00,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:33:00,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:33:00,800 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_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2020-12-03 12:33:00,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:33:00,834 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:33:00,849 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_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/sv-benchmarks/c/bitvector/num_conversion_2.c[380,393] [2020-12-03 12:33:00,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:33:00,883 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:33:00,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00 WrapperNode [2020-12-03 12:33:00,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:33:00,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:33:00,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:33:00,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:33:00,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:33:00,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:33:00,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:33:00,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:33:00,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... [2020-12-03 12:33:00,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:33:00,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:33:00,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:33:00,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:33:00,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ecc1fb6-9f13-4ba8-9f1c-833c74d3ea4d/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 [2020-12-03 12:33:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:33:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:33:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:33:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:33:01,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:33:01,403 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-03 12:33:01,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:33:01 BoogieIcfgContainer [2020-12-03 12:33:01,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:33:01,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:33:01,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:33:01,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:33:01,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:33:00" (1/3) ... [2020-12-03 12:33:01,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27171a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:33:01, skipping insertion in model container [2020-12-03 12:33:01,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:00" (2/3) ... [2020-12-03 12:33:01,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27171a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:33:01, skipping insertion in model container [2020-12-03 12:33:01,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:33:01" (3/3) ... [2020-12-03 12:33:01,415 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2020-12-03 12:33:01,444 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:33:01,447 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-03 12:33:01,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-03 12:33:01,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:33:01,529 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:33:01,529 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:33:01,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:33:01,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:33:01,530 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:33:01,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:33:01,532 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:33:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-03 12:33:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:33:01,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:01,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:33:01,569 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:33:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash 75311, now seen corresponding path program 1 times [2020-12-03 12:33:01,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:01,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998847583] [2020-12-03 12:33:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:33:01,692 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:33:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:33:01,715 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:33:01,738 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:33:01,739 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:33:01,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:33:01,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:33:01 BoogieIcfgContainer [2020-12-03 12:33:01,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:33:01,771 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:33:01,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:33:01,772 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:33:01,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:33:01" (3/4) ... [2020-12-03 12:33:01,776 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 12:33:01,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:33:01,780 INFO L168 Benchmark]: Toolchain (without parser) took 1183.39 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 71.0 MB in the beginning and 100.2 MB in the end (delta: -29.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:01,781 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory was 58.0 MB in the beginning and 58.0 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:01,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.42 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 75.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:01,783 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.35 ms. Allocated memory is still 98.6 MB. Free memory was 75.6 MB in the beginning and 74.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:01,784 INFO L168 Benchmark]: Boogie Preprocessor took 46.70 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:01,786 INFO L168 Benchmark]: RCFGBuilder took 431.20 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 57.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:01,787 INFO L168 Benchmark]: TraceAbstraction took 362.81 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 56.3 MB in the beginning and 100.8 MB in the end (delta: -44.5 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:01,788 INFO L168 Benchmark]: Witness Printer took 5.67 ms. Allocated memory is still 123.7 MB. Free memory was 100.8 MB in the beginning and 100.2 MB in the end (delta: 602.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:01,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory was 58.0 MB in the beginning and 58.0 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.42 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 75.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.35 ms. Allocated memory is still 98.6 MB. Free memory was 75.6 MB in the beginning and 74.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.70 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 431.20 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 57.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 362.81 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 56.3 MB in the beginning and 100.8 MB in the end (delta: -44.5 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.67 ms. Allocated memory is still 123.7 MB. Free memory was 100.8 MB in the beginning and 100.2 MB in the end (delta: 602.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 23]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of shiftLeft at line 23. Possible FailurePath: [L16] unsigned char x = __VERIFIER_nondet_uchar(); [L17] unsigned char y; [L18] unsigned char c; [L20] y = 0 [L21] c = 0 [L22] COND TRUE c < (unsigned char)8 [L23] ((unsigned char)1) << c - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, 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=16occurred 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...