./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/Ackermann-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 678e0110 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/termination-crafted/Ackermann-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 64bit --witnessprinter.graph.data.programhash 5917ee93972738bd406398210804e4342159e8a8 ............................................................................................................................................................................................................................. 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 0.1.24-678e011 [2019-11-19 22:17:57,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:17:57,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:17:57,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:17:57,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:17:57,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:17:57,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:17:57,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:17:57,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:17:57,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:17:57,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:17:57,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:17:57,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:17:57,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:17:57,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:17:57,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:17:57,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:17:57,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:17:57,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:17:57,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:17:58,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:17:58,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:17:58,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:17:58,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:17:58,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:17:58,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:17:58,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:17:58,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:17:58,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:17:58,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:17:58,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:17:58,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:17:58,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:17:58,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:17:58,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:17:58,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:17:58,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:17:58,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:17:58,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:17:58,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:17:58,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:17:58,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-19 22:17:58,071 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:17:58,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:17:58,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:17:58,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:17:58,077 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:17:58,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:17:58,077 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:17:58,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:17:58,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:17:58,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 22:17:58,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:17:58,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 22:17:58,081 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-19 22:17:58,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:17:58,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:17:58,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 22:17:58,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:17:58,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:17:58,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:17:58,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:17:58,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:17:58,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:17:58,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:17:58,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 22:17:58,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:17:58,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 22:17:58,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 22:17:58,086 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5917ee93972738bd406398210804e4342159e8a8 [2019-11-19 22:17:58,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:17:58,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:17:58,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:17:58,434 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:17:58,435 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:17:58,435 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Ackermann-1.c [2019-11-19 22:17:58,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bdf20e4e/f9f3dab5b6484c5b8be408494a61bb37/FLAGd7e1e06a9 [2019-11-19 22:17:58,933 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:17:58,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Ackermann-1.c [2019-11-19 22:17:58,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bdf20e4e/f9f3dab5b6484c5b8be408494a61bb37/FLAGd7e1e06a9 [2019-11-19 22:17:59,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bdf20e4e/f9f3dab5b6484c5b8be408494a61bb37 [2019-11-19 22:17:59,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:17:59,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:17:59,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:17:59,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:17:59,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:17:59,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef89412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59, skipping insertion in model container [2019-11-19 22:17:59,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,304 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:17:59,322 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:17:59,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:17:59,491 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:17:59,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:17:59,520 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:17:59,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59 WrapperNode [2019-11-19 22:17:59,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:17:59,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:17:59,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:17:59,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:17:59,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:17:59,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:17:59,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:17:59,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:17:59,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (1/1) ... [2019-11-19 22:17:59,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:17:59,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:17:59,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:17:59,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:17:59,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (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 [2019-11-19 22:17:59,698 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2019-11-19 22:17:59,699 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2019-11-19 22:17:59,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:17:59,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:17:59,904 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:17:59,905 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 22:17:59,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:17:59 BoogieIcfgContainer [2019-11-19 22:17:59,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:17:59,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:17:59,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:17:59,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:17:59,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:17:59" (1/3) ... [2019-11-19 22:17:59,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152b0a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:17:59, skipping insertion in model container [2019-11-19 22:17:59,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:17:59" (2/3) ... [2019-11-19 22:17:59,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152b0a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:17:59, skipping insertion in model container [2019-11-19 22:17:59,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:17:59" (3/3) ... [2019-11-19 22:17:59,916 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann-1.c [2019-11-19 22:17:59,929 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:17:59,942 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-11-19 22:17:59,961 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-11-19 22:17:59,997 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:17:59,999 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 22:18:00,002 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:18:00,002 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:18:00,002 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:18:00,003 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:18:00,003 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:18:00,003 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:18:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-19 22:18:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-19 22:18:00,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:18:00,049 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-19 22:18:00,051 INFO L410 AbstractCegarLoop]: === Iteration 1 === [AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-19 22:18:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:18:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1868849109, now seen corresponding path program 1 times [2019-11-19 22:18:00,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:18:00,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507213508] [2019-11-19 22:18:00,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:18:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:18:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:18:00,205 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:18:00,206 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 22:18:00,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:18:00 BoogieIcfgContainer [2019-11-19 22:18:00,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:18:00,233 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:18:00,233 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:18:00,234 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:18:00,234 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:17:59" (3/4) ... [2019-11-19 22:18:00,237 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 22:18:00,283 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 22:18:00,283 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:18:00,286 INFO L168 Benchmark]: Toolchain (without parser) took 998.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.7 MB). Free memory was 961.7 MB in the beginning and 1.0 GB in the end (delta: -74.3 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,288 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:18:00,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.18 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 949.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,290 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.43 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:18:00,291 INFO L168 Benchmark]: Boogie Preprocessor took 86.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -119.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,292 INFO L168 Benchmark]: RCFGBuilder took 270.49 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,292 INFO L168 Benchmark]: TraceAbstraction took 325.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,293 INFO L168 Benchmark]: Witness Printer took 50.40 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:18:00,298 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 233.18 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 949.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.43 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 86.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -119.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 270.49 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 325.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * Witness Printer took 50.40 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: integer overflow possible integer overflow possible We found a FailurePath: [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 34 locations, 8 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 6 NumberOfCodeBlocks, 6 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...