./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 03c07d21e8c83715935a492e9413e7409ba63fe0 .......................................................................................................................................................................................................................................................................... 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-4e77c04 [2021-10-13 07:59:34,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:59:34,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:59:34,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:59:34,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:59:34,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:59:34,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:59:34,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:59:34,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:59:34,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:59:34,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:59:34,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:59:34,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:59:34,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:59:34,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:59:34,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:59:34,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:59:34,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:59:34,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:59:34,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:59:34,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:59:34,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:59:34,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:59:34,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:59:34,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:59:34,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:59:34,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:59:34,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:59:34,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:59:34,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:59:34,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:59:34,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:59:34,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:59:34,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:59:34,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:59:34,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:59:34,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:59:34,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:59:34,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:59:34,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:59:34,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:59:34,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-13 07:59:34,491 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:59:34,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:59:34,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:59:34,500 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:59:34,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:59:34,501 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:59:34,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:59:34,501 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:59:34,502 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:59:34,502 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:59:34,503 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:59:34,503 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:59:34,504 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:59:34,504 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:59:34,504 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:59:34,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:59:34,505 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:59:34,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:59:34,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:59:34,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:59:34,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:59:34,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:59:34,507 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-13 07:59:34,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:59:34,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:59:34,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:59:34,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:59:34,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:59:34,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:59:34,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:59:34,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:59:34,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:59:34,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:59:34,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:59:34,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:59:34,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:59:34,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:59:34,512 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03c07d21e8c83715935a492e9413e7409ba63fe0 [2021-10-13 07:59:34,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:59:34,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:59:34,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:59:34,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:59:34,810 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:59:34,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c [2021-10-13 07:59:34,872 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/data/b78831fa7/8ffb906134734190ab08fc869aaa7680/FLAG5debd91dc [2021-10-13 07:59:35,332 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:59:35,333 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c [2021-10-13 07:59:35,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/data/b78831fa7/8ffb906134734190ab08fc869aaa7680/FLAG5debd91dc [2021-10-13 07:59:35,737 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/data/b78831fa7/8ffb906134734190ab08fc869aaa7680 [2021-10-13 07:59:35,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:59:35,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:59:35,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:59:35,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:59:35,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:59:35,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:35,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1a6838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35, skipping insertion in model container [2021-10-13 07:59:35,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:35,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:59:35,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:59:35,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:59:35,943 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:59:35,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:59:35,982 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:59:35,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35 WrapperNode [2021-10-13 07:59:35,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:59:35,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:59:35,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:59:35,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:59:35,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:59:36,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:59:36,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:59:36,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:59:36,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:59:36,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:59:36,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:59:36,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:59:36,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (1/1) ... [2021-10-13 07:59:36,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:59:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:59:36,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:59:36,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:59:36,128 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2021-10-13 07:59:36,128 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2021-10-13 07:59:36,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:59:36,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:59:36,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:59:36,414 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 07:59:36,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:59:36 BoogieIcfgContainer [2021-10-13 07:59:36,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:59:36,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:59:36,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:59:36,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:59:36,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:59:35" (1/3) ... [2021-10-13 07:59:36,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f8e19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:59:36, skipping insertion in model container [2021-10-13 07:59:36,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:59:35" (2/3) ... [2021-10-13 07:59:36,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f8e19b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:59:36, skipping insertion in model container [2021-10-13 07:59:36,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:59:36" (3/3) ... [2021-10-13 07:59:36,440 INFO L111 eAbstractionObserver]: Analyzing ICFG RecursiveMultiplication-2.c [2021-10-13 07:59:36,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:59:36,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-13 07:59:36,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:59:36,512 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 [2021-10-13 07:59:36,513 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-13 07:59:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.625) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 07:59:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:59:36,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:59:36,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:59:36,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-10-13 07:59:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:59:36,539 INFO L82 PathProgramCache]: Analyzing trace with hash 58479830, now seen corresponding path program 1 times [2021-10-13 07:59:36,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:59:36,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276209523] [2021-10-13 07:59:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:59:36,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:59:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:59:36,629 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:59:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:59:36,655 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:59:36,657 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:59:36,658 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,660 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr6ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location multErr7ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 07:59:36,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:59:36,670 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:59:36,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:59:36 BoogieIcfgContainer [2021-10-13 07:59:36,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:59:36,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:59:36,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:59:36,688 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:59:36,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:59:36" (3/4) ... [2021-10-13 07:59:36,691 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:59:36,729 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:59:36,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:59:36,732 INFO L168 Benchmark]: Toolchain (without parser) took 990.35 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 77.8 MB in the beginning and 80.8 MB in the end (delta: -3.0 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:59:36,733 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 107.0 MB. Free memory is still 64.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:59:36,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.69 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 77.5 MB in the beginning and 107.4 MB in the end (delta: -29.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:59:36,735 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.52 ms. Allocated memory is still 130.0 MB. Free memory was 107.3 MB in the beginning and 105.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:59:36,739 INFO L168 Benchmark]: Boogie Preprocessor took 17.70 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 105.2 MB in the end (delta: 729.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:59:36,740 INFO L168 Benchmark]: RCFGBuilder took 379.72 ms. Allocated memory is still 130.0 MB. Free memory was 105.2 MB in the beginning and 95.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:59:36,743 INFO L168 Benchmark]: TraceAbstraction took 268.24 ms. Allocated memory is still 130.0 MB. Free memory was 95.1 MB in the beginning and 82.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:59:36,745 INFO L168 Benchmark]: Witness Printer took 42.48 ms. Allocated memory is still 130.0 MB. Free memory was 82.1 MB in the beginning and 80.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:59:36,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 107.0 MB. Free memory is still 64.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 240.69 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 77.5 MB in the beginning and 107.4 MB in the end (delta: -29.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.52 ms. Allocated memory is still 130.0 MB. Free memory was 107.3 MB in the beginning and 105.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.70 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 105.2 MB in the end (delta: 729.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 379.72 ms. Allocated memory is still 130.0 MB. Free memory was 105.2 MB in the beginning and 95.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 268.24 ms. Allocated memory is still 130.0 MB. Free memory was 95.1 MB in the beginning and 82.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 42.48 ms. Allocated memory is still 130.0 MB. Free memory was 82.1 MB in the beginning and 80.8 MB in the end (delta: 1.3 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: 14]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int m = __VERIFIER_nondet_int(); [L24] int n = __VERIFIER_nondet_int(); [L25] CALL mult(m, n) VAL [\old(m)=-2147483648, \old(n)=0] [L13] COND TRUE m < 0 VAL [\old(m)=-2147483648, \old(n)=0, m=-2147483648, n=0] [L14] -m VAL [\old(m)=-2147483648, \old(n)=0, m=-2147483648, n=0] - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 19]: 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, 29 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 165.9ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 6.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: 5.5ms SsaConstructionTime, 22.6ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 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! [2021-10-13 07:59:36,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36781ea6-55c6-4b01-ab24-1d75588e0073/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...