./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive-simple/id_b5_o10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_b5_o10-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2fbe8cf5b50674394627f719f6766631caa7190e .......................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-20 06:29:02,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:29:02,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:29:02,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:29:02,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:29:02,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:29:02,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:29:02,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:29:02,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:29:02,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:29:02,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:29:02,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:29:02,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:29:02,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:29:02,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:29:02,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:29:02,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:29:02,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:29:02,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:29:02,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:29:02,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:29:02,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:29:02,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:29:02,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:29:02,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:29:02,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:29:02,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:29:02,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:29:02,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:29:02,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:29:02,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:29:02,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:29:02,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:29:02,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:29:02,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:29:02,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:29:02,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:29:02,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:29:02,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:29:02,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:29:02,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:29:02,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-10-20 06:29:02,968 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:29:02,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:29:02,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:29:02,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:29:02,973 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:29:02,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:29:02,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:29:02,974 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:29:02,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:29:02,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:29:02,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:29:02,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:29:02,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:29:02,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:29:02,977 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:29:02,977 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:29:02,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:29:02,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:29:02,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:29:02,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:29:02,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:29:02,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:29:02,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:29:02,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:29:02,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:29:02,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:29:02,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:29:02,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:29:02,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:29:02,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:29:02,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:29:02,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> Automizer 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 -> 2fbe8cf5b50674394627f719f6766631caa7190e [2020-10-20 06:29:03,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:29:03,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:29:03,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:29:03,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:29:03,253 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:29:03,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b5_o10-1.c [2020-10-20 06:29:03,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/477045126/d4176f1bfa7a41f4be6db139fcae2abc/FLAGef521f7ea [2020-10-20 06:29:03,871 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:29:03,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b5_o10-1.c [2020-10-20 06:29:03,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/477045126/d4176f1bfa7a41f4be6db139fcae2abc/FLAGef521f7ea [2020-10-20 06:29:04,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/477045126/d4176f1bfa7a41f4be6db139fcae2abc [2020-10-20 06:29:04,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:29:04,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:29:04,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:29:04,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:29:04,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:29:04,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec74525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04, skipping insertion in model container [2020-10-20 06:29:04,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:29:04,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:29:04,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:29:04,568 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:29:04,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:29:04,605 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:29:04,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04 WrapperNode [2020-10-20 06:29:04,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:29:04,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:29:04,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:29:04,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:29:04,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:29:04,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:29:04,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:29:04,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:29:04,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... [2020-10-20 06:29:04,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:29:04,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:29:04,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:29:04,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:29:04,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:29:04,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:29:04,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:29:04,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:29:04,728 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-20 06:29:04,728 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-20 06:29:04,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:29:04,959 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:29:04,959 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 06:29:04,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:29:04 BoogieIcfgContainer [2020-10-20 06:29:04,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:29:04,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:29:04,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:29:04,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:29:04,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:29:04" (1/3) ... [2020-10-20 06:29:04,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8774691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:29:04, skipping insertion in model container [2020-10-20 06:29:04,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:29:04" (2/3) ... [2020-10-20 06:29:04,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8774691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:29:04, skipping insertion in model container [2020-10-20 06:29:04,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:29:04" (3/3) ... [2020-10-20 06:29:04,969 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-1.c [2020-10-20 06:29:04,982 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:29:04,989 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-20 06:29:05,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-20 06:29:05,019 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:29:05,020 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:29:05,020 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:29:05,020 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:29:05,020 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:29:05,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:29:05,021 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:29:05,021 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:29:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-20 06:29:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 06:29:05,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:29:05,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 06:29:05,044 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:29:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:29:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 890470000, now seen corresponding path program 1 times [2020-10-20 06:29:05,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:29:05,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280302047] [2020-10-20 06:29:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:29:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:29:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:29:05,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280302047] [2020-10-20 06:29:05,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:29:05,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:29:05,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587759367] [2020-10-20 06:29:05,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:29:05,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:29:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:29:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:29:05,297 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-20 06:29:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:29:05,399 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-20 06:29:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:29:05,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-10-20 06:29:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:29:05,414 INFO L225 Difference]: With dead ends: 28 [2020-10-20 06:29:05,415 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 06:29:05,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:29:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 06:29:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-20 06:29:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 06:29:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-20 06:29:05,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 6 [2020-10-20 06:29:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:29:05,469 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-20 06:29:05,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:29:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-20 06:29:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 06:29:05,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:29:05,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:29:05,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:29:05,472 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:29:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:29:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1834766279, now seen corresponding path program 1 times [2020-10-20 06:29:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:29:05,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703497571] [2020-10-20 06:29:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:29:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:29:05,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:29:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:29:05,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:29:05,599 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:29:05,599 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:29:05,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:29:05,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:29:05 BoogieIcfgContainer [2020-10-20 06:29:05,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:29:05,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:29:05,656 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:29:05,656 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:29:05,657 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:29:04" (3/4) ... [2020-10-20 06:29:05,659 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:29:05,731 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:29:05,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:29:05,736 INFO L168 Benchmark]: Toolchain (without parser) took 1430.05 ms. Allocated memory was 40.9 MB in the beginning and 46.7 MB in the end (delta: 5.8 MB). Free memory was 19.8 MB in the beginning and 26.8 MB in the end (delta: -7.0 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:29:05,738 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. [2020-10-20 06:29:05,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.64 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 19.0 MB in the beginning and 21.1 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:05,743 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.24 ms. Allocated memory is still 41.4 MB. Free memory was 21.1 MB in the beginning and 19.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:05,744 INFO L168 Benchmark]: Boogie Preprocessor took 17.67 ms. Allocated memory is still 41.4 MB. Free memory was 19.5 MB in the beginning and 18.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:05,746 INFO L168 Benchmark]: RCFGBuilder took 298.79 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 18.3 MB in the beginning and 22.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:05,748 INFO L168 Benchmark]: TraceAbstraction took 690.17 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 21.6 MB in the beginning and 28.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:05,749 INFO L168 Benchmark]: Witness Printer took 76.42 ms. Allocated memory is still 46.7 MB. Free memory was 28.8 MB in the beginning and 26.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:29:05,760 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 294.64 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 19.0 MB in the beginning and 21.1 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 37.24 ms. Allocated memory is still 41.4 MB. Free memory was 21.1 MB in the beginning and 19.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 17.67 ms. Allocated memory is still 41.4 MB. Free memory was 19.5 MB in the beginning and 18.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 298.79 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 18.3 MB in the beginning and 22.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 690.17 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 21.6 MB in the beginning and 28.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 14.3 GB. * Witness Printer took 76.42 ms. Allocated memory is still 46.7 MB. Free memory was 28.8 MB in the beginning and 26.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 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, 25 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 31 SDslu, 25 SDs, 0 SdLazy, 19 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 65 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...