./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/Ackermann-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3 --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 0.2.1-dev-5709675 [2021-10-15 19:59:15,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:59:15,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:59:15,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:59:15,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:59:15,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:59:15,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:59:15,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:59:15,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:59:15,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:59:15,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:59:15,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:59:15,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:59:15,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:59:15,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:59:15,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:59:15,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:59:15,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:59:15,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:59:15,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:59:15,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:59:15,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:59:15,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:59:15,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:59:15,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:59:15,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:59:15,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:59:15,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:59:15,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:59:15,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:59:15,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:59:15,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:59:15,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:59:15,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:59:15,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:59:15,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:59:15,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:59:15,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:59:15,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:59:15,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:59:15,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:59:15,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-10-15 19:59:15,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:59:15,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:59:15,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:59:15,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:59:15,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:59:15,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:59:15,241 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:59:15,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:59:15,242 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:59:15,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:59:15,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:59:15,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:59:15,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:59:15,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:59:15,247 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-15 19:59:15,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:59:15,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:59:15,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:59:15,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:59:15,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:59:15,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:59:15,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:59:15,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:59:15,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:59:15,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:59:15,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:59:15,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:59:15,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:59:15,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:59:15,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5917ee93972738bd406398210804e4342159e8a8 [2021-10-15 19:59:15,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:59:15,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:59:15,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:59:15,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:59:15,627 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:59:15,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/termination-crafted/Ackermann-1.c [2021-10-15 19:59:15,755 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/data/c882d1e1c/65bfbe01130949ffbceec3fce7fd1c6f/FLAG6dd23ec41 [2021-10-15 19:59:16,317 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:59:16,318 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/sv-benchmarks/c/termination-crafted/Ackermann-1.c [2021-10-15 19:59:16,326 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/data/c882d1e1c/65bfbe01130949ffbceec3fce7fd1c6f/FLAG6dd23ec41 [2021-10-15 19:59:16,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/data/c882d1e1c/65bfbe01130949ffbceec3fce7fd1c6f [2021-10-15 19:59:16,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:59:16,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:59:16,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:59:16,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:59:16,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:59:16,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7beeaa4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16, skipping insertion in model container [2021-10-15 19:59:16,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:59:16,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:59:16,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:59:16,919 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:59:16,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:59:16,953 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:59:16,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16 WrapperNode [2021-10-15 19:59:16,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:59:16,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:59:16,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:59:16,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:59:16,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:59:16,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:59:16,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:59:16,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:59:16,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:16,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:59:17,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:59:17,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:59:17,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:59:17,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (1/1) ... [2021-10-15 19:59:17,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:59:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:17,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:59:17,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:59:17,088 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2021-10-15 19:59:17,088 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2021-10-15 19:59:17,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:59:17,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:59:17,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:59:17,311 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 19:59:17,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:59:17 BoogieIcfgContainer [2021-10-15 19:59:17,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:59:17,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:59:17,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:59:17,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:59:17,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:59:16" (1/3) ... [2021-10-15 19:59:17,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f582e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:59:17, skipping insertion in model container [2021-10-15 19:59:17,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:59:16" (2/3) ... [2021-10-15 19:59:17,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f582e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:59:17, skipping insertion in model container [2021-10-15 19:59:17,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:59:17" (3/3) ... [2021-10-15 19:59:17,323 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann-1.c [2021-10-15 19:59:17,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:59:17,345 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-15 19:59:17,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:59:17,420 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:59:17,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-15 19:59:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:59:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-15 19:59:17,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:59:17,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:59:17,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-10-15 19:59:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:17,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1868849109, now seen corresponding path program 1 times [2021-10-15 19:59:17,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:17,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293855408] [2021-10-15 19:59:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:17,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:59:17,552 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:59:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:59:17,602 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:59:17,608 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:59:17,610 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,617 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,618 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,619 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,619 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,619 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,620 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,621 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-15 19:59:17,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:59:17,654 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:59:17,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:59:17 BoogieIcfgContainer [2021-10-15 19:59:17,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:59:17,678 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:59:17,678 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:59:17,679 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:59:17,679 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:59:17" (3/4) ... [2021-10-15 19:59:17,682 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:59:17,720 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:59:17,721 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:59:17,723 INFO L168 Benchmark]: Toolchain (without parser) took 1053.32 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 52.7 MB in the beginning and 86.1 MB in the end (delta: -33.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,724 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 69.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.05 ms. Allocated memory is still 92.3 MB. Free memory was 52.5 MB in the beginning and 68.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.80 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 67.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,727 INFO L168 Benchmark]: Boogie Preprocessor took 16.89 ms. Allocated memory is still 92.3 MB. Free memory was 67.5 MB in the beginning and 66.6 MB in the end (delta: 885.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,727 INFO L168 Benchmark]: RCFGBuilder took 313.46 ms. Allocated memory is still 92.3 MB. Free memory was 66.5 MB in the beginning and 57.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,728 INFO L168 Benchmark]: TraceAbstraction took 361.71 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 57.2 MB in the beginning and 87.6 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,729 INFO L168 Benchmark]: Witness Printer took 43.00 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 69.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.05 ms. Allocated memory is still 92.3 MB. Free memory was 52.5 MB in the beginning and 68.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.80 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 67.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.89 ms. Allocated memory is still 92.3 MB. Free memory was 67.5 MB in the beginning and 66.6 MB in the end (delta: 885.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 313.46 ms. Allocated memory is still 92.3 MB. Free memory was 66.5 MB in the beginning and 57.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 361.71 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 57.2 MB in the beginning and 87.6 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 43.00 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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] - UnprovableResult [Line: 10]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 34 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 230.7ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 9.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.2ms SsaConstructionTime, 31.2ms SatisfiabilityAnalysisTime, 0.0ms 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:59:17,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4f1a5c9-390b-42f7-8802-09aada83cab7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...