./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex6.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE --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 78741214800a0b84d55aaf48eb07d6d31c527d6c92aeea37b41275f82a13b130 ............................................................................................................................................................................................................................................................................. 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-e943c26 [2021-10-24 10:32:30,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:32:30,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:32:30,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:32:30,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:32:30,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:32:30,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:32:30,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:32:30,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:32:30,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:32:30,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:32:30,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:32:30,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:32:30,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:32:30,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:32:30,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:32:30,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:32:30,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:32:30,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:32:30,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:32:30,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:32:30,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:32:30,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:32:30,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:32:30,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:32:30,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:32:30,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:32:31,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:32:31,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:32:31,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:32:31,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:32:31,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:32:31,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:32:31,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:32:31,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:32:31,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:32:31,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:32:31,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:32:31,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:32:31,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:32:31,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:32:31,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-24 10:32:31,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:32:31,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:32:31,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:32:31,039 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:32:31,039 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:32:31,039 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:32:31,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:32:31,040 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:32:31,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:32:31,040 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:32:31,040 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:32:31,040 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:32:31,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:32:31,041 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:32:31,041 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:32:31,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:32:31,042 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 10:32:31,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:32:31,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:32:31,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:32:31,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:32:31,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:32:31,043 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-24 10:32:31,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:32:31,044 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:32:31,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:32:31,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:32:31,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:32:31,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:32:31,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:32:31,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:32:31,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:32:31,045 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:32:31,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:32:31,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:32:31,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:32:31,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:32:31,046 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_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78741214800a0b84d55aaf48eb07d6d31c527d6c92aeea37b41275f82a13b130 [2021-10-24 10:32:31,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:32:31,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:32:31,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:32:31,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:32:31,341 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:32:31,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex6.c [2021-10-24 10:32:31,410 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/data/8cad6b31a/85fb9c4dcf6e4003a25324439dfebab2/FLAG057aaa10a [2021-10-24 10:32:31,912 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:32:31,913 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex6.c [2021-10-24 10:32:31,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/data/8cad6b31a/85fb9c4dcf6e4003a25324439dfebab2/FLAG057aaa10a [2021-10-24 10:32:32,304 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/data/8cad6b31a/85fb9c4dcf6e4003a25324439dfebab2 [2021-10-24 10:32:32,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:32:32,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:32:32,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:32:32,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:32:32,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:32:32,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707ada2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32, skipping insertion in model container [2021-10-24 10:32:32,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:32:32,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:32:32,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:32:32,490 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:32:32,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:32:32,519 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:32:32,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32 WrapperNode [2021-10-24 10:32:32,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:32:32,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:32:32,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:32:32,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:32:32,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:32:32,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:32:32,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:32:32,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:32:32,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:32:32,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:32:32,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:32:32,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:32:32,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (1/1) ... [2021-10-24 10:32:32,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:32:32,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:32:32,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:32:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:32:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-10-24 10:32:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-10-24 10:32:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-10-24 10:32:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-10-24 10:32:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:32:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:32:32,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:32:32,852 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-24 10:32:32,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:32:32 BoogieIcfgContainer [2021-10-24 10:32:32,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:32:32,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:32:32,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:32:32,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:32:32,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:32:32" (1/3) ... [2021-10-24 10:32:32,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2996f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:32:32, skipping insertion in model container [2021-10-24 10:32:32,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:32:32" (2/3) ... [2021-10-24 10:32:32,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2996f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:32:32, skipping insertion in model container [2021-10-24 10:32:32,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:32:32" (3/3) ... [2021-10-24 10:32:32,869 INFO L111 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex6.c [2021-10-24 10:32:32,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:32:32,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-24 10:32:32,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:32:32,937 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, mAutomataTypeConcurrency=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 [2021-10-24 10:32:32,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-24 10:32:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-24 10:32:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:32:32,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:32:32,961 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:32:32,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-10-24 10:32:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:32:32,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1926226671, now seen corresponding path program 1 times [2021-10-24 10:32:32,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:32:32,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521076980] [2021-10-24 10:32:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:32:32,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:32:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:32:33,067 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:32:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:32:33,099 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:32:33,101 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:32:33,103 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,105 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,106 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,106 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,107 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,107 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,107 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,108 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:32:33,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:32:33,116 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:32:33,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:32:33 BoogieIcfgContainer [2021-10-24 10:32:33,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:32:33,136 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:32:33,136 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:32:33,136 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:32:33,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:32:32" (3/4) ... [2021-10-24 10:32:33,139 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 10:32:33,170 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:32:33,171 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:32:33,173 INFO L168 Benchmark]: Toolchain (without parser) took 863.02 ms. Allocated memory is still 130.0 MB. Free memory was 103.4 MB in the beginning and 67.2 MB in the end (delta: 36.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:32:33,174 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:32:33,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.72 ms. Allocated memory is still 130.0 MB. Free memory was 103.2 MB in the beginning and 94.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:32:33,175 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 130.0 MB. Free memory was 94.5 MB in the beginning and 93.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:32:33,176 INFO L168 Benchmark]: Boogie Preprocessor took 19.52 ms. Allocated memory is still 130.0 MB. Free memory was 93.2 MB in the beginning and 92.5 MB in the end (delta: 742.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:32:33,177 INFO L168 Benchmark]: RCFGBuilder took 283.47 ms. Allocated memory is still 130.0 MB. Free memory was 92.4 MB in the beginning and 82.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:32:33,177 INFO L168 Benchmark]: TraceAbstraction took 278.15 ms. Allocated memory is still 130.0 MB. Free memory was 82.0 MB in the beginning and 68.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:32:33,178 INFO L168 Benchmark]: Witness Printer took 35.38 ms. Allocated memory is still 130.0 MB. Free memory was 68.6 MB in the beginning and 67.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:32:33,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 204.72 ms. Allocated memory is still 130.0 MB. Free memory was 103.2 MB in the beginning and 94.7 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.85 ms. Allocated memory is still 130.0 MB. Free memory was 94.5 MB in the beginning and 93.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.52 ms. Allocated memory is still 130.0 MB. Free memory was 93.2 MB in the beginning and 92.5 MB in the end (delta: 742.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 283.47 ms. Allocated memory is still 130.0 MB. Free memory was 92.4 MB in the beginning and 82.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 278.15 ms. Allocated memory is still 130.0 MB. Free memory was 82.0 MB in the beginning and 68.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 35.38 ms. Allocated memory is still 130.0 MB. Free memory was 68.6 MB in the beginning and 67.2 MB in the end (delta: 1.4 MB). There was no memory consumed. 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: 21]: integer overflow possible integer overflow possible We found a FailurePath: [L34] int a = __VERIFIER_nondet_int(); [L35] int b = __VERIFIER_nondet_int(); [L36] COND TRUE a >= 0 && b >= 0 [L37] CALL f(a, b) VAL [\old(a)=2147483647, \old(b)=1] [L18] COND FALSE !(b == 0) VAL [\old(a)=2147483647, \old(b)=1, a=2147483647, b=1] [L21] 1+a VAL [\old(a)=2147483647, \old(b)=1, a=2147483647, b=1] - UnprovableResult [Line: 21]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 21]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 21]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 29]: 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 3 procedures, 36 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 186.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 8.6ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred 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: 5.1ms SsaConstructionTime, 30.1ms 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! [2021-10-24 10:32:33,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2708ff7c-3ba0-4c8d-9206-67062b82892b/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...