./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 cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/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 0.1.24-cad4683 [2019-11-15 22:58:54,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:58:54,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:58:54,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:58:54,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:58:54,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:58:54,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:58:54,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:58:54,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:58:54,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:58:54,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:58:54,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:58:54,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:58:54,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:58:54,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:58:54,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:58:54,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:58:54,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:58:54,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:58:54,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:58:54,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:58:54,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:58:54,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:58:54,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:58:54,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:58:54,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:58:54,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:58:54,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:58:54,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:58:54,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:58:54,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:58:54,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:58:54,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:58:54,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:58:54,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:58:54,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:58:54,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:58:54,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:58:54,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:58:54,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:58:54,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:58:54,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-11-15 22:58:54,526 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:58:54,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:58:54,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:58:54,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:58:54,541 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:58:54,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:58:54,542 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 22:58:54,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:58:54,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:58:54,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:58:54,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:58:54,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:58:54,544 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-15 22:58:54,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:58:54,545 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:58:54,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:58:54,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:58:54,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:58:54,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:58:54,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:58:54,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:58:54,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:58:54,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:58:54,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:58:54,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:58:54,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:58:54,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:58:54,550 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_d332d805-e873-4a3f-abd8-cf7a17be3866/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 [2019-11-15 22:58:54,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:58:54,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:58:54,614 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:58:54,616 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:58:54,616 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:58:54,617 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2019-11-15 22:58:54,694 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/data/10eeb24d5/5fcfb512d3b2470a92f74a701d0249ca/FLAG52073ffe3 [2019-11-15 22:58:55,170 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:58:55,170 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2019-11-15 22:58:55,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/data/10eeb24d5/5fcfb512d3b2470a92f74a701d0249ca/FLAG52073ffe3 [2019-11-15 22:58:55,555 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/data/10eeb24d5/5fcfb512d3b2470a92f74a701d0249ca [2019-11-15 22:58:55,557 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:58:55,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:58:55,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:58:55,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:58:55,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:58:55,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:55,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd25b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55, skipping insertion in model container [2019-11-15 22:58:55,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:55,580 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:58:55,596 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:58:55,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:58:55,813 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:58:55,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:58:55,971 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:58:55,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55 WrapperNode [2019-11-15 22:58:55,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:58:55,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:58:55,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:58:55,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:58:55,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:55,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:58:56,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:58:56,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:58:56,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:58:56,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... [2019-11-15 22:58:56,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:58:56,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:58:56,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:58:56,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:58:56,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/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 [2019-11-15 22:58:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-15 22:58:56,112 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-15 22:58:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:58:56,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:58:56,315 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:58:56,315 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 22:58:56,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:58:56 BoogieIcfgContainer [2019-11-15 22:58:56,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:58:56,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:58:56,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:58:56,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:58:56,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:58:55" (1/3) ... [2019-11-15 22:58:56,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2001e005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:58:56, skipping insertion in model container [2019-11-15 22:58:56,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:58:55" (2/3) ... [2019-11-15 22:58:56,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2001e005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:58:56, skipping insertion in model container [2019-11-15 22:58:56,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:58:56" (3/3) ... [2019-11-15 22:58:56,332 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2a.c [2019-11-15 22:58:56,342 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:58:56,349 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-15 22:58:56,361 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-15 22:58:56,393 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:58:56,393 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:58:56,393 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:58:56,393 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:58:56,393 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:58:56,394 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:58:56,394 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:58:56,395 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:58:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-15 22:58:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-15 22:58:56,427 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:58:56,428 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-15 22:58:56,429 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 22:58:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:58:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash 43226870, now seen corresponding path program 1 times [2019-11-15 22:58:56,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:58:56,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433383828] [2019-11-15 22:58:56,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:58:56,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:58:56,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:58:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:58:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:58:56,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433383828] [2019-11-15 22:58:56,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:58:56,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:58:56,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061667168] [2019-11-15 22:58:56,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:58:56,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:58:56,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:58:56,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:58:56,664 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-11-15 22:58:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:58:56,808 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2019-11-15 22:58:56,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:58:56,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-11-15 22:58:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:58:56,825 INFO L225 Difference]: With dead ends: 32 [2019-11-15 22:58:56,825 INFO L226 Difference]: Without dead ends: 27 [2019-11-15 22:58:56,829 INFO L600 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 [2019-11-15 22:58:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-15 22:58:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-15 22:58:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 22:58:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-15 22:58:56,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 5 [2019-11-15 22:58:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:58:56,922 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-15 22:58:56,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:58:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-15 22:58:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-15 22:58:56,924 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:58:56,924 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-15 22:58:56,924 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-15 22:58:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:58:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1340033008, now seen corresponding path program 1 times [2019-11-15 22:58:56,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:58:56,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381752892] [2019-11-15 22:58:56,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:58:56,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:58:56,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:58:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:58:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:58:56,966 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 22:58:56,967 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 22:58:56,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:58:56 BoogieIcfgContainer [2019-11-15 22:58:56,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:58:56,992 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:58:56,992 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:58:56,992 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:58:56,993 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:58:56" (3/4) ... [2019-11-15 22:58:56,996 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 22:58:57,036 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d332d805-e873-4a3f-abd8-cf7a17be3866/bin/uautomizer/witness.graphml [2019-11-15 22:58:57,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:58:57,038 INFO L168 Benchmark]: Toolchain (without parser) took 1479.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -154.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 11.5 GB. [2019-11-15 22:58:57,039 INFO L168 Benchmark]: CDTParser took 1.41 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:58:57,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -205.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 22:58:57,041 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:58:57,041 INFO L168 Benchmark]: Boogie Preprocessor took 18.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:58:57,042 INFO L168 Benchmark]: RCFGBuilder took 287.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-15 22:58:57,043 INFO L168 Benchmark]: TraceAbstraction took 674.05 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: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:58:57,043 INFO L168 Benchmark]: Witness Printer took 44.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:58:57,046 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.41 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 408.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -205.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 287.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 674.05 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: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Witness Printer took 44.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. 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: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, 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...