./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-1.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_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/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 484424e2603cb6f289397755afc3736c2105460d ......................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:11:47,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:11:47,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:11:48,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:11:48,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:11:48,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:11:48,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:11:48,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:11:48,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:11:48,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:11:48,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:11:48,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:11:48,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:11:48,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:11:48,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:11:48,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:11:48,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:11:48,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:11:48,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:11:48,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:11:48,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:11:48,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:11:48,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:11:48,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:11:48,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:11:48,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:11:48,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:11:48,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:11:48,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:11:48,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:11:48,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:11:48,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:11:48,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:11:48,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:11:48,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:11:48,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:11:48,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:11:48,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:11:48,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:11:48,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:11:48,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:11:48,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-12-09 08:11:48,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:11:48,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:11:48,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:11:48,073 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:11:48,074 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:11:48,074 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:11:48,074 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:11:48,074 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:11:48,074 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:11:48,074 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:11:48,074 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:11:48,074 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:11:48,075 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:11:48,075 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:11:48,075 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:11:48,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:11:48,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:11:48,076 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 08:11:48,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:11:48,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:11:48,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:11:48,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:11:48,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:11:48,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:11:48,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:11:48,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:11:48,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:11:48,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:11:48,078 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:11:48,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:11:48,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:11:48,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:11:48,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:11:48,078 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_652a5484-561c-4089-b851-5ba75ccc3ca4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 484424e2603cb6f289397755afc3736c2105460d [2020-12-09 08:11:48,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:11:48,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:11:48,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:11:48,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:11:48,293 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:11:48,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_b3_o2-1.c [2020-12-09 08:11:48,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/data/e1a8f0608/d777cca1e701477e9101ecdd8bf5db7b/FLAGf9a45b696 [2020-12-09 08:11:48,692 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:11:48,692 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/sv-benchmarks/c/recursive-simple/id_b3_o2-1.c [2020-12-09 08:11:48,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/data/e1a8f0608/d777cca1e701477e9101ecdd8bf5db7b/FLAGf9a45b696 [2020-12-09 08:11:49,110 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/data/e1a8f0608/d777cca1e701477e9101ecdd8bf5db7b [2020-12-09 08:11:49,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:11:49,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:11:49,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:11:49,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:11:49,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:11:49,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5e8047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49, skipping insertion in model container [2020-12-09 08:11:49,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:11:49,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:11:49,228 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_652a5484-561c-4089-b851-5ba75ccc3ca4/sv-benchmarks/c/recursive-simple/id_b3_o2-1.c[514,527] [2020-12-09 08:11:49,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:11:49,234 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:11:49,244 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_652a5484-561c-4089-b851-5ba75ccc3ca4/sv-benchmarks/c/recursive-simple/id_b3_o2-1.c[514,527] [2020-12-09 08:11:49,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:11:49,254 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:11:49,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49 WrapperNode [2020-12-09 08:11:49,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:11:49,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:11:49,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:11:49,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:11:49,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:11:49,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:11:49,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:11:49,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:11:49,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... [2020-12-09 08:11:49,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:11:49,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:11:49,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:11:49,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:11:49,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:11:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:11:49,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:11:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:11:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-09 08:11:49,350 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-09 08:11:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:11:49,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:11:49,528 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 08:11:49,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:11:49 BoogieIcfgContainer [2020-12-09 08:11:49,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:11:49,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:11:49,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:11:49,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:11:49,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:11:49" (1/3) ... [2020-12-09 08:11:49,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a7d046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:11:49, skipping insertion in model container [2020-12-09 08:11:49,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:11:49" (2/3) ... [2020-12-09 08:11:49,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a7d046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:11:49, skipping insertion in model container [2020-12-09 08:11:49,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:11:49" (3/3) ... [2020-12-09 08:11:49,536 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-1.c [2020-12-09 08:11:49,546 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:11:49,548 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 08:11:49,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 08:11:49,571 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:11:49,571 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:11:49,571 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:11:49,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:11:49,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:11:49,571 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:11:49,571 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:11:49,572 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:11:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 08:11:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:11:49,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:11:49,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 08:11:49,586 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:11:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:11:49,590 INFO L82 PathProgramCache]: Analyzing trace with hash 65704179, now seen corresponding path program 1 times [2020-12-09 08:11:49,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:11:49,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014627987] [2020-12-09 08:11:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:11:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:11:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:11:49,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014627987] [2020-12-09 08:11:49,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:11:49,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:11:49,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752710026] [2020-12-09 08:11:49,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:11:49,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:11:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:11:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:11:49,741 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-12-09 08:11:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:11:49,800 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-12-09 08:11:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:11:49,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 08:11:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:11:49,807 INFO L225 Difference]: With dead ends: 18 [2020-12-09 08:11:49,807 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 08:11:49,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 08:11:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 08:11:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 08:11:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 08:11:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 08:11:49,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2020-12-09 08:11:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:11:49,834 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 08:11:49,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:11:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 08:11:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:11:49,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:11:49,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:11:49,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:11:49,835 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:11:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:11:49,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2036829602, now seen corresponding path program 1 times [2020-12-09 08:11:49,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:11:49,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398519548] [2020-12-09 08:11:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:11:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:11:49,850 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:11:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:11:49,862 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:11:49,875 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 08:11:49,875 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:11:49,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:11:49,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:11:49 BoogieIcfgContainer [2020-12-09 08:11:49,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:11:49,892 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:11:49,892 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:11:49,893 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:11:49,893 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:11:49" (3/4) ... [2020-12-09 08:11:49,894 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 08:11:49,918 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_652a5484-561c-4089-b851-5ba75ccc3ca4/bin/utaipan/witness.graphml [2020-12-09 08:11:49,918 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:11:49,920 INFO L168 Benchmark]: Toolchain (without parser) took 804.98 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 48.5 MB in the beginning and 75.7 MB in the end (delta: -27.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:11:49,920 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory is still 64.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:11:49,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.94 ms. Allocated memory is still 88.1 MB. Free memory was 48.3 MB in the beginning and 61.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:11:49,921 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 88.1 MB. Free memory was 61.4 MB in the beginning and 60.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:11:49,921 INFO L168 Benchmark]: Boogie Preprocessor took 11.61 ms. Allocated memory is still 88.1 MB. Free memory was 60.1 MB in the beginning and 59.1 MB in the end (delta: 978.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:11:49,922 INFO L168 Benchmark]: RCFGBuilder took 235.44 ms. Allocated memory is still 88.1 MB. Free memory was 59.1 MB in the beginning and 58.8 MB in the end (delta: 348.2 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:11:49,922 INFO L168 Benchmark]: TraceAbstraction took 361.03 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 58.1 MB in the beginning and 77.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2020-12-09 08:11:49,923 INFO L168 Benchmark]: Witness Printer took 25.81 ms. Allocated memory is still 107.0 MB. Free memory was 77.3 MB in the beginning and 75.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:11:49,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 88.1 MB. Free memory is still 64.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 138.94 ms. Allocated memory is still 88.1 MB. Free memory was 48.3 MB in the beginning and 61.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 88.1 MB. Free memory was 61.4 MB in the beginning and 60.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.61 ms. Allocated memory is still 88.1 MB. Free memory was 60.1 MB in the beginning and 59.1 MB in the end (delta: 978.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 235.44 ms. Allocated memory is still 88.1 MB. Free memory was 59.1 MB in the beginning and 58.8 MB in the end (delta: 348.2 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 361.03 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 58.1 MB in the beginning and 77.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. * Witness Printer took 25.81 ms. Allocated memory is still 107.0 MB. Free memory was 77.3 MB in the beginning and 75.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: integer overflow possible integer overflow possible We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL id(input) VAL [\old(x)=-2147483648] [L7] COND FALSE !(x==0) VAL [\old(x)=-2147483648, x=-2147483648] [L8] x-1 VAL [\old(x)=-2147483648, x=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 23 SDslu, 12 SDs, 0 SdLazy, 19 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...