./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan --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 0.2.0-a4ecdab [2020-11-30 02:01:41,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:01:41,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:01:41,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:01:41,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:01:41,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:01:41,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:01:41,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:01:41,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:01:41,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:01:41,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:01:41,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:01:41,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:01:41,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:01:41,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:01:41,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:01:41,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:01:41,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:01:41,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:01:41,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:01:41,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:01:41,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:01:41,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:01:41,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:01:41,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:01:41,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:01:41,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:01:41,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:01:41,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:01:41,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:01:41,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:01:41,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:01:41,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:01:41,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:01:41,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:01:41,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:01:41,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:01:41,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:01:41,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:01:41,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:01:41,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:01:42,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-30 02:01:42,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:01:42,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:01:42,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:01:42,051 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:01:42,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:01:42,052 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:01:42,052 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:01:42,052 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:01:42,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:01:42,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:01:42,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:01:42,054 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:01:42,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:01:42,054 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:01:42,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:01:42,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:01:42,056 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:01:42,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:01:42,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:01:42,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:01:42,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:01:42,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:01:42,057 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-30 02:01:42,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:01:42,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:01:42,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:01:42,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:01:42,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:01:42,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:01:42,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:01:42,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:01:42,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:01:42,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:01:42,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:01:42,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:01:42,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:01:42,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:01:42,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:01:42,063 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-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03c07d21e8c83715935a492e9413e7409ba63fe0 [2020-11-30 02:01:42,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:01:42,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:01:42,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:01:42,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:01:42,388 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:01:42,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c [2020-11-30 02:01:42,474 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/data/3eb16e92a/6964b43057274a9fbb913b4f36e4bf98/FLAG7089f9e9e [2020-11-30 02:01:42,993 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:01:42,994 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c [2020-11-30 02:01:43,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/data/3eb16e92a/6964b43057274a9fbb913b4f36e4bf98/FLAG7089f9e9e [2020-11-30 02:01:43,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/data/3eb16e92a/6964b43057274a9fbb913b4f36e4bf98 [2020-11-30 02:01:43,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:01:43,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:01:43,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:01:43,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:01:43,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:01:43,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b4ade6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43, skipping insertion in model container [2020-11-30 02:01:43,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:01:43,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:01:43,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:01:43,586 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:01:43,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:01:43,634 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:01:43,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43 WrapperNode [2020-11-30 02:01:43,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:01:43,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:01:43,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:01:43,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:01:43,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:01:43,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:01:43,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:01:43,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:01:43,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... [2020-11-30 02:01:43,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:01:43,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:01:43,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:01:43,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:01:43,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/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 [2020-11-30 02:01:43,778 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-11-30 02:01:43,778 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-11-30 02:01:43,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:01:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:01:44,192 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:01:44,192 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-30 02:01:44,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:01:44 BoogieIcfgContainer [2020-11-30 02:01:44,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:01:44,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:01:44,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:01:44,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:01:44,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:01:43" (1/3) ... [2020-11-30 02:01:44,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bd63f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:01:44, skipping insertion in model container [2020-11-30 02:01:44,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:01:43" (2/3) ... [2020-11-30 02:01:44,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bd63f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:01:44, skipping insertion in model container [2020-11-30 02:01:44,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:01:44" (3/3) ... [2020-11-30 02:01:44,207 INFO L111 eAbstractionObserver]: Analyzing ICFG RecursiveMultiplication-2.c [2020-11-30 02:01:44,219 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:01:44,223 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-30 02:01:44,239 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-30 02:01:44,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:01:44,275 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:01:44,275 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:01:44,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:01:44,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:01:44,275 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:01:44,275 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:01:44,275 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:01:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-30 02:01:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:01:44,298 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:44,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:01:44,299 INFO L429 AbstractCegarLoop]: === Iteration 1 === [multErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:01:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 58479830, now seen corresponding path program 1 times [2020-11-30 02:01:44,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:44,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409251695] [2020-11-30 02:01:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:01:44,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:01:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:01:44,433 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:01:44,452 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 02:01:44,452 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:01:44,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:01:44,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:01:44 BoogieIcfgContainer [2020-11-30 02:01:44,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:01:44,477 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:01:44,477 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:01:44,477 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:01:44,478 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:01:44" (3/4) ... [2020-11-30 02:01:44,481 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 02:01:44,534 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dc1b2e55-421a-493e-bea7-47701ee5b629/bin/utaipan/witness.graphml [2020-11-30 02:01:44,534 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:01:44,536 INFO L168 Benchmark]: Toolchain (without parser) took 1161.73 ms. Allocated memory is still 117.4 MB. Free memory was 81.4 MB in the beginning and 68.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:44,548 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 117.4 MB. Free memory is still 97.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:01:44,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.82 ms. Allocated memory is still 117.4 MB. Free memory was 81.2 MB in the beginning and 95.5 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:44,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.15 ms. Allocated memory is still 117.4 MB. Free memory was 95.5 MB in the beginning and 94.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:01:44,550 INFO L168 Benchmark]: Boogie Preprocessor took 19.90 ms. Allocated memory is still 117.4 MB. Free memory was 94.3 MB in the beginning and 93.5 MB in the end (delta: 791.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:01:44,551 INFO L168 Benchmark]: RCFGBuilder took 502.68 ms. Allocated memory is still 117.4 MB. Free memory was 93.5 MB in the beginning and 81.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:44,552 INFO L168 Benchmark]: TraceAbstraction took 278.62 ms. Allocated memory is still 117.4 MB. Free memory was 81.0 MB in the beginning and 70.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:44,552 INFO L168 Benchmark]: Witness Printer took 57.36 ms. Allocated memory is still 117.4 MB. Free memory was 69.9 MB in the beginning and 68.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:01:44,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 117.4 MB. Free memory is still 97.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.82 ms. Allocated memory is still 117.4 MB. Free memory was 81.2 MB in the beginning and 95.5 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.15 ms. Allocated memory is still 117.4 MB. Free memory was 95.5 MB in the beginning and 94.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.90 ms. Allocated memory is still 117.4 MB. Free memory was 94.3 MB in the beginning and 93.5 MB in the end (delta: 791.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 502.68 ms. Allocated memory is still 117.4 MB. Free memory was 93.5 MB in the beginning and 81.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 278.62 ms. Allocated memory is still 117.4 MB. Free memory was 81.0 MB in the beginning and 70.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 57.36 ms. Allocated memory is still 117.4 MB. Free memory was 69.9 MB in the beginning and 68.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 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! Received shutdown request...