./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 f470102c 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 0.1.25-f470102 [2019-11-28 20:22:20,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:22:20,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:22:20,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:22:20,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:22:20,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:22:20,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:22:20,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:22:20,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:22:20,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:22:20,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:22:20,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:22:20,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:22:20,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:22:20,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:22:20,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:22:20,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:22:20,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:22:20,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:22:20,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:22:20,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:22:20,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:22:20,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:22:20,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:22:20,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:22:20,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:22:20,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:22:20,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:22:20,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:22:20,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:22:20,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:22:20,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:22:20,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:22:20,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:22:20,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:22:20,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:22:20,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:22:20,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:22:20,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:22:20,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:22:20,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:22:20,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-28 20:22:20,281 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:22:20,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:22:20,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:22:20,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:22:20,289 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:22:20,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:22:20,291 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:22:20,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:22:20,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:22:20,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 20:22:20,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:22:20,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 20:22:20,293 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-28 20:22:20,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:22:20,294 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:22:20,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 20:22:20,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:22:20,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:22:20,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:22:20,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:22:20,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:22:20,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:22:20,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:22:20,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 20:22:20,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:22:20,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:22:20,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 20:22:20,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:22:20,299 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 [2019-11-28 20:22:20,626 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:22:20,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:22:20,647 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:22:20,648 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:22:20,649 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:22:20,651 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Ackermann-1.c [2019-11-28 20:22:20,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3823786/4dbd2b64aae94149a8424bba70d5b78d/FLAG221215d09 [2019-11-28 20:22:21,163 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:22:21,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Ackermann-1.c [2019-11-28 20:22:21,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3823786/4dbd2b64aae94149a8424bba70d5b78d/FLAG221215d09 [2019-11-28 20:22:21,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3823786/4dbd2b64aae94149a8424bba70d5b78d [2019-11-28 20:22:21,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:22:21,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:22:21,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:22:21,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:22:21,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:22:21,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc5c18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21, skipping insertion in model container [2019-11-28 20:22:21,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:22:21,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:22:21,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:22:21,784 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:22:21,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:22:21,824 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:22:21,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21 WrapperNode [2019-11-28 20:22:21,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:22:21,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:22:21,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:22:21,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:22:21,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:22:21,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:22:21,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:22:21,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:22:21,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (1/1) ... [2019-11-28 20:22:21,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:22:21,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:22:21,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:22:21,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:22:21,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (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 [2019-11-28 20:22:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2019-11-28 20:22:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2019-11-28 20:22:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:22:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:22:22,283 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:22:22,283 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 20:22:22,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:22 BoogieIcfgContainer [2019-11-28 20:22:22,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:22:22,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:22:22,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:22:22,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:22:22,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:22:21" (1/3) ... [2019-11-28 20:22:22,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9ec63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:22:22, skipping insertion in model container [2019-11-28 20:22:22,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:22:21" (2/3) ... [2019-11-28 20:22:22,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9ec63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:22:22, skipping insertion in model container [2019-11-28 20:22:22,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:22" (3/3) ... [2019-11-28 20:22:22,299 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann-1.c [2019-11-28 20:22:22,310 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:22:22,319 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-11-28 20:22:22,331 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-11-28 20:22:22,355 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:22:22,355 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 20:22:22,355 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:22:22,355 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:22:22,356 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:22:22,356 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:22:22,356 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:22:22,356 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:22:22,374 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-28 20:22:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 20:22:22,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:22:22,379 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 20:22:22,379 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]=== [2019-11-28 20:22:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:22:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1868849109, now seen corresponding path program 1 times [2019-11-28 20:22:22,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:22:22,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139597707] [2019-11-28 20:22:22,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:22:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:22:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:22:22,514 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:22:22,515 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 20:22:22,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:22:22 BoogieIcfgContainer [2019-11-28 20:22:22,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:22:22,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:22:22,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:22:22,536 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:22:22,536 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:22:22" (3/4) ... [2019-11-28 20:22:22,539 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 20:22:22,578 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:22:22,578 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:22:22,580 INFO L168 Benchmark]: Toolchain (without parser) took 1011.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -130.6 MB). Peak memory consumption was 5.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:22,581 INFO L168 Benchmark]: CDTParser took 0.59 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. [2019-11-28 20:22:22,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.90 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:22,583 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.62 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:22:22,584 INFO L168 Benchmark]: Boogie Preprocessor took 76.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -179.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:22,585 INFO L168 Benchmark]: RCFGBuilder took 351.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:22,586 INFO L168 Benchmark]: TraceAbstraction took 243.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:22,587 INFO L168 Benchmark]: Witness Printer took 42.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:22:22,592 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 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 255.90 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.62 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 76.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -179.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 351.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 243.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * Witness Printer took 42.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. 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: 0.1s, 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...