./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_1_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_1_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 17445458ba8d623c3c0fdc1c0c03b23eaf5b75fd03e8e26d6837d08cfa4b709a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:18:32,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:18:32,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:18:32,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:18:32,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:18:32,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:18:32,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:18:32,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:18:32,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:18:32,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:18:32,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:18:32,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:18:32,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:18:32,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:18:32,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:18:32,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:18:32,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:18:32,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:18:32,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:18:32,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:18:32,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:18:32,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:18:32,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:18:32,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:18:32,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:18:32,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:18:32,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:18:32,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:18:32,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:18:32,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:18:32,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:18:32,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:18:32,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:18:32,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:18:32,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:18:32,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:18:32,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:18:32,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:18:32,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:18:32,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:18:32,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:18:32,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:18:32,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:18:32,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:18:32,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:18:32,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:18:32,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:18:32,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:18:32,580 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:18:32,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:18:32,581 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:18:32,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:18:32,582 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:18:32,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:18:32,583 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:18:32,583 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:18:32,583 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:18:32,584 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:18:32,584 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:18:32,584 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:18:32,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:18:32,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:18:32,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:18:32,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:18:32,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:18:32,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:18:32,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:18:32,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:18:32,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:18:32,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:18:32,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:18:32,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:18:32,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:18:32,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:18:32,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:18:32,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:18:32,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:18:32,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:18:32,594 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:18:32,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:18:32,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:18:32,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:18:32,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:18:32,595 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_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17445458ba8d623c3c0fdc1c0c03b23eaf5b75fd03e8e26d6837d08cfa4b709a [2021-11-21 00:18:32,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:18:32,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:18:32,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:18:32,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:18:32,948 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:18:32,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/gcd_3+newton_1_3.i [2021-11-21 00:18:33,022 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/b1f43e811/1dd545cb764f4834b1369af6c0b806cb/FLAG107c08ffc [2021-11-21 00:18:33,514 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:18:33,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i [2021-11-21 00:18:33,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/b1f43e811/1dd545cb764f4834b1369af6c0b806cb/FLAG107c08ffc [2021-11-21 00:18:33,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/b1f43e811/1dd545cb764f4834b1369af6c0b806cb [2021-11-21 00:18:33,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:18:33,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:18:33,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:18:33,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:18:33,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:18:33,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:18:33" (1/1) ... [2021-11-21 00:18:33,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79502af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:33, skipping insertion in model container [2021-11-21 00:18:33,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:18:33" (1/1) ... [2021-11-21 00:18:33,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:18:33,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:18:34,147 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[1226,1239] [2021-11-21 00:18:34,201 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[2820,2833] [2021-11-21 00:18:34,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:18:34,224 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:18:34,259 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[1226,1239] [2021-11-21 00:18:34,283 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[2820,2833] [2021-11-21 00:18:34,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:18:34,315 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:18:34,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34 WrapperNode [2021-11-21 00:18:34,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:18:34,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:18:34,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:18:34,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:18:34,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,394 INFO L137 Inliner]: procedures = 27, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 78 [2021-11-21 00:18:34,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:18:34,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:18:34,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:18:34,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:18:34,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:18:34,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:18:34,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:18:34,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:18:34,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (1/1) ... [2021-11-21 00:18:34,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:18:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:18:34,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:18:34,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:18:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:18:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:18:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:18:34,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:18:34,646 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:18:34,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:18:34,810 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:18:34,867 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:18:34,867 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:18:34,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:18:34 BoogieIcfgContainer [2021-11-21 00:18:34,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:18:34,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:18:34,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:18:34,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:18:34,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:18:33" (1/3) ... [2021-11-21 00:18:34,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5896d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:18:34, skipping insertion in model container [2021-11-21 00:18:34,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:34" (2/3) ... [2021-11-21 00:18:34,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5896d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:18:34, skipping insertion in model container [2021-11-21 00:18:34,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:18:34" (3/3) ... [2021-11-21 00:18:34,879 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_1_3.i [2021-11-21 00:18:34,885 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:18:34,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:18:34,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:18:34,949 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 [2021-11-21 00:18:34,949 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:18:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 14 states have internal predecessors, (19), 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) [2021-11-21 00:18:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:18:34,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:18:34,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:18:34,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:18:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:18:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash 3484809, now seen corresponding path program 1 times [2021-11-21 00:18:34,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:18:34,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213145551] [2021-11-21 00:18:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:18:34,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:18:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:18:35,107 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:18:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:18:35,147 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:18:35,150 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:18:35,151 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-21 00:18:35,154 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-21 00:18:35,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:18:35,160 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-21 00:18:35,169 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:18:35,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:18:35 BoogieIcfgContainer [2021-11-21 00:18:35,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:18:35,234 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:18:35,234 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:18:35,234 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:18:35,235 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:18:34" (3/4) ... [2021-11-21 00:18:35,239 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:18:35,239 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:18:35,241 INFO L158 Benchmark]: Toolchain (without parser) took 1361.55ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 73.5MB in the beginning and 101.9MB in the end (delta: -28.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:18:35,242 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory was 58.9MB in the beginning and 58.9MB in the end (delta: 14.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:18:35,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 431.35ms. Allocated memory is still 104.9MB. Free memory was 73.2MB in the beginning and 79.0MB in the end (delta: -5.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:18:35,244 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.46ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 77.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:18:35,244 INFO L158 Benchmark]: Boogie Preprocessor took 56.27ms. Allocated memory is still 104.9MB. Free memory was 77.3MB in the beginning and 76.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:18:35,245 INFO L158 Benchmark]: RCFGBuilder took 417.11ms. Allocated memory is still 104.9MB. Free memory was 76.1MB in the beginning and 63.7MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:18:35,258 INFO L158 Benchmark]: TraceAbstraction took 360.83ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 63.1MB in the beginning and 102.5MB in the end (delta: -39.4MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2021-11-21 00:18:35,260 INFO L158 Benchmark]: Witness Printer took 5.71ms. Allocated memory is still 125.8MB. Free memory was 102.5MB in the beginning and 101.9MB in the end (delta: 669.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:18:35,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory was 58.9MB in the beginning and 58.9MB in the end (delta: 14.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 431.35ms. Allocated memory is still 104.9MB. Free memory was 73.2MB in the beginning and 79.0MB in the end (delta: -5.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.46ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 77.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.27ms. Allocated memory is still 104.9MB. Free memory was 77.3MB in the beginning and 76.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 417.11ms. Allocated memory is still 104.9MB. Free memory was 76.1MB in the beginning and 63.7MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 360.83ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 63.1MB in the beginning and 102.5MB in the end (delta: -39.4MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * Witness Printer took 5.71ms. Allocated memory is still 125.8MB. Free memory was 102.5MB in the beginning and 101.9MB in the end (delta: 669.0kB). There was no memory consumed. 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 - UnprovableResult [Line: 102]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 91, overapproximation of someBinaryDOUBLEComparisonOperation at line 101, overapproximation of someBinaryArithmeticFLOAToperation at line 80. Possible FailurePath: [L108] COND FALSE !(__VERIFIER_nondet_int()) [L111] CALL main2() [L90] float IN = __VERIFIER_nondet_float(); [L91] CALL assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L75] COND FALSE !(!cond) [L91] RET assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L93] CALL, EXPR f(IN) [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L93] RET, EXPR f(IN) [L93] CALL, EXPR fp(IN) [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L93] RET, EXPR fp(IN) [L93] float x = IN - f(IN)/fp(IN); [L101] COND TRUE !(x < 0.1) VAL [IN=49] [L102] reach_error() VAL [IN=49] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 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=15occurred 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, 4 NumberOfCodeBlocks, 4 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 could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:18:35,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_1_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 17445458ba8d623c3c0fdc1c0c03b23eaf5b75fd03e8e26d6837d08cfa4b709a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:18:38,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:18:38,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:18:38,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:18:38,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:18:38,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:18:38,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:18:38,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:18:38,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:18:38,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:18:38,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:18:38,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:18:38,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:18:38,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:18:38,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:18:38,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:18:38,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:18:38,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:18:38,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:18:38,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:18:38,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:18:38,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:18:38,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:18:38,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:18:38,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:18:38,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:18:38,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:18:38,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:18:38,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:18:38,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:18:38,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:18:38,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:18:38,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:18:38,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:18:38,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:18:38,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:18:38,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:18:38,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:18:38,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:18:38,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:18:38,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:18:38,324 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:18:38,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:18:38,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:18:38,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:18:38,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:18:38,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:18:38,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:18:38,376 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:18:38,377 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:18:38,377 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:18:38,377 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:18:38,379 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:18:38,379 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:18:38,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:18:38,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:18:38,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:18:38,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:18:38,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:18:38,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:18:38,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:18:38,383 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:18:38,383 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:18:38,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:18:38,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:18:38,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:18:38,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:18:38,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:18:38,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:18:38,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:18:38,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:18:38,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:18:38,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:18:38,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:18:38,388 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:18:38,388 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:18:38,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:18:38,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:18:38,389 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:18:38,389 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17445458ba8d623c3c0fdc1c0c03b23eaf5b75fd03e8e26d6837d08cfa4b709a [2021-11-21 00:18:38,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:18:38,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:18:38,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:18:38,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:18:38,961 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:18:38,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/gcd_3+newton_1_3.i [2021-11-21 00:18:39,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/c143f9fd5/8423949bbcd34cc585942bf5d10ac18e/FLAG6ee045d9c [2021-11-21 00:18:39,609 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:18:39,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i [2021-11-21 00:18:39,618 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/c143f9fd5/8423949bbcd34cc585942bf5d10ac18e/FLAG6ee045d9c [2021-11-21 00:18:39,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/data/c143f9fd5/8423949bbcd34cc585942bf5d10ac18e [2021-11-21 00:18:39,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:18:39,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:18:39,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:18:39,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:18:39,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:18:39,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:18:39" (1/1) ... [2021-11-21 00:18:39,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5ef961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:39, skipping insertion in model container [2021-11-21 00:18:39,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:18:39" (1/1) ... [2021-11-21 00:18:40,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:18:40,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:18:40,186 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[1226,1239] [2021-11-21 00:18:40,258 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[2820,2833] [2021-11-21 00:18:40,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:18:40,285 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:18:40,305 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[1226,1239] [2021-11-21 00:18:40,334 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/sv-benchmarks/c/combinations/gcd_3+newton_1_3.i[2820,2833] [2021-11-21 00:18:40,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:18:40,352 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:18:40,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40 WrapperNode [2021-11-21 00:18:40,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:18:40,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:18:40,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:18:40,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:18:40,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,415 INFO L137 Inliner]: procedures = 28, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 73 [2021-11-21 00:18:40,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:18:40,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:18:40,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:18:40,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:18:40,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:18:40,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:18:40,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:18:40,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:18:40,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (1/1) ... [2021-11-21 00:18:40,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:18:40,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:18:40,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:18:40,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:18:40,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:18:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:18:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:18:40,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:18:40,664 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:18:40,666 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:18:47,286 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:18:47,292 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:18:47,315 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:18:47,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:18:47 BoogieIcfgContainer [2021-11-21 00:18:47,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:18:47,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:18:47,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:18:47,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:18:47,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:18:39" (1/3) ... [2021-11-21 00:18:47,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a16e996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:18:47, skipping insertion in model container [2021-11-21 00:18:47,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:18:40" (2/3) ... [2021-11-21 00:18:47,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a16e996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:18:47, skipping insertion in model container [2021-11-21 00:18:47,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:18:47" (3/3) ... [2021-11-21 00:18:47,328 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_1_3.i [2021-11-21 00:18:47,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:18:47,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:18:47,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:18:47,394 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 [2021-11-21 00:18:47,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:18:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 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) [2021-11-21 00:18:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:18:47,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:18:47,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:18:47,419 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:18:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:18:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash 447749113, now seen corresponding path program 1 times [2021-11-21 00:18:47,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:18:47,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492873752] [2021-11-21 00:18:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:18:47,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:18:47,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:18:47,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:18:47,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:18:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:18:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:18:48,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:18:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:18:48,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:18:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:18:48,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:18:48,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492873752] [2021-11-21 00:18:48,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492873752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:18:48,960 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:18:48,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:18:48,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204575259] [2021-11-21 00:18:48,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:18:48,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:18:48,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:18:49,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:18:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:18:49,017 INFO L87 Difference]: Start difference. First operand has 27 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-21 00:18:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:18:49,042 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2021-11-21 00:18:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:18:49,050 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) Word has length 9 [2021-11-21 00:18:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:18:49,059 INFO L225 Difference]: With dead ends: 47 [2021-11-21 00:18:49,059 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 00:18:49,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:18:49,067 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:18:49,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:18:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 00:18:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 00:18:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-11-21 00:18:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-21 00:18:49,107 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-11-21 00:18:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:18:49,108 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-21 00:18:49,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-21 00:18:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-21 00:18:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:18:49,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:18:49,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:18:49,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:18:49,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:18:49,334 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:18:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:18:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash 505007415, now seen corresponding path program 1 times [2021-11-21 00:18:49,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:18:49,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038609054] [2021-11-21 00:18:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:18:49,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:18:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:18:49,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:18:49,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7386290-38bd-4094-8d64-129b4fd84bf7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process