./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.11.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs --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 e9d7ecce3341c1a0e7dbaa773a0e3b75c2ae418634be1c3bbfc6e77df313f180 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:01:39,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:01:39,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:01:39,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:01:39,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:01:39,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:01:39,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:01:39,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:01:39,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:01:39,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:01:39,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:01:39,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:01:39,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:01:39,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:01:39,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:01:39,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:01:39,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:01:39,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:01:39,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:01:39,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:01:39,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:01:39,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:01:39,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:01:39,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:01:39,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:01:39,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:01:39,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:01:39,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:01:39,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:01:39,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:01:39,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:01:39,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:01:39,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:01:39,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:01:39,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:01:39,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:01:39,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:01:39,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:01:39,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:01:39,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:01:39,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:01:39,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-19 15:01:39,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:01:39,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:01:39,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:01:39,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:01:39,664 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:01:39,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:01:39,665 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:01:39,665 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:01:39,665 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:01:39,666 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:01:39,667 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:01:39,667 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:01:39,668 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:01:39,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:01:39,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:01:39,669 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:01:39,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:01:39,671 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 15:01:39,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:01:39,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:01:39,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:01:39,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:01:39,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:01:39,673 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-19 15:01:39,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:01:39,673 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:01:39,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:01:39,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:01:39,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:01:39,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:39,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:01:39,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:01:39,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:01:39,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:01:39,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:01:39,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:01:39,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:01:39,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:01:39,679 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_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9d7ecce3341c1a0e7dbaa773a0e3b75c2ae418634be1c3bbfc6e77df313f180 [2021-11-19 15:01:40,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:01:40,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:01:40,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:01:40,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:01:40,046 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:01:40,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.11.c [2021-11-19 15:01:40,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/data/a5fa1fdbc/26743eeac81d4461870686bff206ab6b/FLAG00773f9e2 [2021-11-19 15:01:40,637 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:01:40,638 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.11.c [2021-11-19 15:01:40,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/data/a5fa1fdbc/26743eeac81d4461870686bff206ab6b/FLAG00773f9e2 [2021-11-19 15:01:41,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/data/a5fa1fdbc/26743eeac81d4461870686bff206ab6b [2021-11-19 15:01:41,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:01:41,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:01:41,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:41,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:01:41,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:01:41,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a7d3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41, skipping insertion in model container [2021-11-19 15:01:41,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:01:41,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:01:41,248 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:41,289 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:01:41,316 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:01:41,337 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:01:41,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41 WrapperNode [2021-11-19 15:01:41,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:01:41,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:41,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:01:41,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:01:41,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,375 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2021-11-19 15:01:41,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:01:41,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:01:41,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:01:41,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:01:41,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:01:41,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:01:41,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:01:41,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:01:41,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (1/1) ... [2021-11-19 15:01:41,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:01:41,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:01:41,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:01:41,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:01:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:01:41,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:01:41,589 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:01:41,592 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:01:41,723 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:01:41,738 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:01:41,738 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:01:41,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:01:41 BoogieIcfgContainer [2021-11-19 15:01:41,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:01:41,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:01:41,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:01:41,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:01:41,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:01:41" (1/3) ... [2021-11-19 15:01:41,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d786ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:01:41, skipping insertion in model container [2021-11-19 15:01:41,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:01:41" (2/3) ... [2021-11-19 15:01:41,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d786ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:01:41, skipping insertion in model container [2021-11-19 15:01:41,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:01:41" (3/3) ... [2021-11-19 15:01:41,750 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex2.11.c [2021-11-19 15:01:41,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:01:41,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-19 15:01:41,821 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:01:41,830 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 [2021-11-19 15:01:41,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-19 15:01:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:01:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-19 15:01:41,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:41,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-19 15:01:41,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-11-19 15:01:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:41,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2456, now seen corresponding path program 1 times [2021-11-19 15:01:41,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:01:41,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383038610] [2021-11-19 15:01:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:41,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:01:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 15:01:41,994 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 15:01:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 15:01:42,019 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 15:01:42,022 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 15:01:42,023 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 14 remaining) [2021-11-19 15:01:42,026 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 14 remaining) [2021-11-19 15:01:42,027 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 14 remaining) [2021-11-19 15:01:42,027 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 14 remaining) [2021-11-19 15:01:42,028 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 14 remaining) [2021-11-19 15:01:42,028 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 14 remaining) [2021-11-19 15:01:42,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 14 remaining) [2021-11-19 15:01:42,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 14 remaining) [2021-11-19 15:01:42,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 14 remaining) [2021-11-19 15:01:42,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 14 remaining) [2021-11-19 15:01:42,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 14 remaining) [2021-11-19 15:01:42,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 14 remaining) [2021-11-19 15:01:42,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 14 remaining) [2021-11-19 15:01:42,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 14 remaining) [2021-11-19 15:01:42,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 15:01:42,039 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-19 15:01:42,043 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 15:01:42,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 03:01:42 BoogieIcfgContainer [2021-11-19 15:01:42,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 15:01:42,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 15:01:42,066 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 15:01:42,066 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 15:01:42,067 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:01:41" (3/4) ... [2021-11-19 15:01:42,069 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 15:01:42,101 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 15:01:42,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 15:01:42,103 INFO L158 Benchmark]: Toolchain (without parser) took 1067.72ms. Allocated memory is still 100.7MB. Free memory was 68.4MB in the beginning and 51.6MB in the end (delta: 16.8MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-11-19 15:01:42,104 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:01:42,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.27ms. Allocated memory is still 100.7MB. Free memory was 68.4MB in the beginning and 78.5MB in the end (delta: -10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 15:01:42,106 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.62ms. Allocated memory is still 100.7MB. Free memory was 77.9MB in the beginning and 76.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:01:42,107 INFO L158 Benchmark]: Boogie Preprocessor took 33.24ms. Allocated memory is still 100.7MB. Free memory was 76.8MB in the beginning and 75.8MB in the end (delta: 971.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 15:01:42,107 INFO L158 Benchmark]: RCFGBuilder took 329.66ms. Allocated memory is still 100.7MB. Free memory was 75.8MB in the beginning and 66.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 15:01:42,108 INFO L158 Benchmark]: TraceAbstraction took 321.77ms. Allocated memory is still 100.7MB. Free memory was 65.9MB in the beginning and 53.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 15:01:42,109 INFO L158 Benchmark]: Witness Printer took 36.59ms. Allocated memory is still 100.7MB. Free memory was 53.3MB in the beginning and 51.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 15:01:42,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 297.27ms. Allocated memory is still 100.7MB. Free memory was 68.4MB in the beginning and 78.5MB in the end (delta: -10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.62ms. Allocated memory is still 100.7MB. Free memory was 77.9MB in the beginning and 76.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.24ms. Allocated memory is still 100.7MB. Free memory was 76.8MB in the beginning and 75.8MB in the end (delta: 971.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 329.66ms. Allocated memory is still 100.7MB. Free memory was 75.8MB in the beginning and 66.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 321.77ms. Allocated memory is still 100.7MB. Free memory was 65.9MB in the beginning and 53.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 36.59ms. Allocated memory is still 100.7MB. Free memory was 53.3MB in the beginning and 51.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, y, oldx; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] 4*x VAL [x=536870912, y=0] - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: 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 1 procedures, 32 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 2 NumberOfCodeBlocks, 2 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! [2021-11-19 15:01:42,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7fe0287-d1cf-404d-a6e5-b0b9479ecf3b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)