./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer --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 a87305f2bf70381ae4b40b8cfb9e2ca1c7e8a065 ................................................................................................................................................................................................................................................................ 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 [2019-12-07 16:44:36,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:44:36,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:44:36,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:44:36,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:44:36,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:44:36,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:44:36,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:44:36,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:44:36,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:44:36,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:44:36,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:44:36,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:44:36,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:44:36,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:44:36,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:44:36,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:44:36,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:44:36,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:44:36,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:44:36,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:44:36,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:44:36,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:44:36,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:44:36,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:44:36,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:44:36,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:44:36,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:44:36,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:44:36,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:44:36,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:44:36,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:44:36,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:44:36,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:44:36,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:44:36,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:44:36,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:44:36,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:44:36,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:44:36,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:44:36,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:44:36,177 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-12-07 16:44:36,188 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:44:36,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:44:36,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:44:36,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:44:36,190 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:44:36,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:44:36,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:44:36,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:44:36,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:44:36,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:44:36,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:44:36,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:44:36,191 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 16:44:36,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:44:36,191 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:44:36,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:44:36,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:44:36,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:44:36,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:44:36,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:44:36,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:44:36,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:44:36,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:44:36,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:44:36,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:44:36,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:44:36,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:44:36,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:44:36,193 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer 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 -> a87305f2bf70381ae4b40b8cfb9e2ca1c7e8a065 [2019-12-07 16:44:36,296 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:44:36,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:44:36,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:44:36,310 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:44:36,310 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:44:36,311 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2019-12-07 16:44:36,351 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/data/bbc06ac2a/5158d2c9f0e44a4e951802abe552443f/FLAG431637510 [2019-12-07 16:44:36,703 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:44:36,703 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2019-12-07 16:44:36,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/data/bbc06ac2a/5158d2c9f0e44a4e951802abe552443f/FLAG431637510 [2019-12-07 16:44:37,102 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/data/bbc06ac2a/5158d2c9f0e44a4e951802abe552443f [2019-12-07 16:44:37,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:44:37,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:44:37,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:44:37,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:44:37,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:44:37,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@675abcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37, skipping insertion in model container [2019-12-07 16:44:37,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:44:37,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:44:37,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:44:37,216 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:44:37,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:44:37,264 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:44:37,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37 WrapperNode [2019-12-07 16:44:37,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:44:37,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:44:37,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:44:37,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:44:37,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:44:37,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:44:37,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:44:37,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:44:37,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... [2019-12-07 16:44:37,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:44:37,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:44:37,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:44:37,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:44:37,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/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 [2019-12-07 16:44:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-12-07 16:44:37,336 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-12-07 16:44:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:44:37,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:44:37,428 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:44:37,428 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 16:44:37,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:44:37 BoogieIcfgContainer [2019-12-07 16:44:37,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:44:37,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:44:37,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:44:37,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:44:37,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:44:37" (1/3) ... [2019-12-07 16:44:37,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a313a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:44:37, skipping insertion in model container [2019-12-07 16:44:37,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:44:37" (2/3) ... [2019-12-07 16:44:37,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a313a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:44:37, skipping insertion in model container [2019-12-07 16:44:37,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:44:37" (3/3) ... [2019-12-07 16:44:37,433 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2a.c [2019-12-07 16:44:37,439 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:44:37,443 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-12-07 16:44:37,451 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-12-07 16:44:37,465 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:44:37,465 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:44:37,465 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:44:37,465 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:44:37,466 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:44:37,466 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:44:37,466 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:44:37,466 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:44:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 16:44:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 16:44:37,479 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:44:37,480 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 16:44:37,480 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 16:44:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:44:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash 43226870, now seen corresponding path program 1 times [2019-12-07 16:44:37,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:44:37,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710234382] [2019-12-07 16:44:37,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:44:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:44:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:44:37,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710234382] [2019-12-07 16:44:37,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:44:37,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:44:37,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893149572] [2019-12-07 16:44:37,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:44:37,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:44:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:44:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:44:37,617 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-12-07 16:44:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:44:37,695 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2019-12-07 16:44:37,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:44:37,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-12-07 16:44:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:44:37,703 INFO L225 Difference]: With dead ends: 32 [2019-12-07 16:44:37,703 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 16:44:37,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:44:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 16:44:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-12-07 16:44:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 16:44:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-12-07 16:44:37,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 5 [2019-12-07 16:44:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:44:37,738 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-12-07 16:44:37,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:44:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-12-07 16:44:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 16:44:37,739 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:44:37,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 16:44:37,739 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 16:44:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:44:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1340033008, now seen corresponding path program 1 times [2019-12-07 16:44:37,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:44:37,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557019459] [2019-12-07 16:44:37,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:44:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:44:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:44:37,759 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:44:37,760 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:44:37,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:44:37 BoogieIcfgContainer [2019-12-07 16:44:37,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:44:37,774 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:44:37,774 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:44:37,774 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:44:37,774 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:44:37" (3/4) ... [2019-12-07 16:44:37,776 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:44:37,800 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f58a0ae4-081f-46c7-9a20-c61a6f68a7fb/bin/uautomizer/witness.graphml [2019-12-07 16:44:37,800 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:44:37,801 INFO L168 Benchmark]: Toolchain (without parser) took 696.08 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 88.1 MB). Free memory was 946.2 MB in the beginning and 1.0 GB in the end (delta: -85.7 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:44:37,802 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:44:37,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 88.1 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -139.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:44:37,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:44:37,803 INFO L168 Benchmark]: Boogie Preprocessor took 10.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:44:37,803 INFO L168 Benchmark]: RCFGBuilder took 132.83 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: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-12-07 16:44:37,803 INFO L168 Benchmark]: TraceAbstraction took 344.26 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:44:37,804 INFO L168 Benchmark]: Witness Printer took 26.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:44:37,806 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 159.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 88.1 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -139.3 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 132.83 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: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 344.26 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. * Witness Printer took 26.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: integer overflow possible integer overflow possible We found a FailurePath: [L19] int x = __VERIFIER_nondet_int(); [L20] CALL g(x) VAL [\old(x)=-2147483648] [L12] COND FALSE !(x == 0) VAL [\old(x)=-2147483648, x=-2147483648] [L15] x - 1 VAL [\old(x)=-2147483648, x=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 20 SDslu, 33 SDs, 0 SdLazy, 29 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...