./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_1_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_1_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V --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 f2d1b02369a1f0b5046b14bc967075017a0d2438bdce8876a41d0f5cadb3a872 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:25:17,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:25:17,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:25:17,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:25:17,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:25:17,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:25:17,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:25:17,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:25:17,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:25:17,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:25:17,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:25:17,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:25:17,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:25:17,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:25:17,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:25:17,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:25:17,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:25:17,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:25:17,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:25:17,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:25:17,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:25:17,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:25:17,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:25:17,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:25:17,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:25:17,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:25:17,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:25:17,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:25:17,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:25:17,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:25:17,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:25:17,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:25:17,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:25:17,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:25:17,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:25:17,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:25:17,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:25:17,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:25:17,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:25:17,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:25:17,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:25:17,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:25:17,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:25:17,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:25:17,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:25:17,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:25:17,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:25:17,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:25:17,732 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:25:17,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:25:17,732 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:25:17,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:25:17,734 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:25:17,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:25:17,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:25:17,734 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:25:17,735 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:25:17,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:25:17,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:25:17,735 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:25:17,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:25:17,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:25:17,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:25:17,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:25:17,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:25:17,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:25:17,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:25:17,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:25:17,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:25:17,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:25:17,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:25:17,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:25:17,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:25:17,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:25:17,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:25:17,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:25:17,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:25:17,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:25:17,742 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:25:17,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:25:17,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:25:17,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:25:17,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:25:17,743 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_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2d1b02369a1f0b5046b14bc967075017a0d2438bdce8876a41d0f5cadb3a872 [2021-11-23 02:25:18,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:25:18,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:25:18,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:25:18,111 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:25:18,111 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:25:18,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/gcd_1+newton_1_2.i [2021-11-23 02:25:18,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/382960d4f/c1a1a38f39774c0fa81a46908f36b6fa/FLAGcc770c5e3 [2021-11-23 02:25:18,722 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:25:18,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i [2021-11-23 02:25:18,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/382960d4f/c1a1a38f39774c0fa81a46908f36b6fa/FLAGcc770c5e3 [2021-11-23 02:25:19,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/382960d4f/c1a1a38f39774c0fa81a46908f36b6fa [2021-11-23 02:25:19,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:25:19,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:25:19,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:25:19,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:25:19,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:25:19,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dcd04a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19, skipping insertion in model container [2021-11-23 02:25:19,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:25:19,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:25:19,324 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[1226,1239] [2021-11-23 02:25:19,358 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[2786,2799] [2021-11-23 02:25:19,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:25:19,371 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:25:19,383 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[1226,1239] [2021-11-23 02:25:19,395 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[2786,2799] [2021-11-23 02:25:19,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:25:19,409 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:25:19,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19 WrapperNode [2021-11-23 02:25:19,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:25:19,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:25:19,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:25:19,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:25:19,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,475 INFO L137 Inliner]: procedures = 27, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 78 [2021-11-23 02:25:19,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:25:19,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:25:19,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:25:19,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:25:19,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:25:19,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:25:19,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:25:19,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:25:19,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (1/1) ... [2021-11-23 02:25:19,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:25:19,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:25:19,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:25:19,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:25:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:25:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:25:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:25:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:25:19,666 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:25:19,667 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:25:19,858 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:25:19,903 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:25:19,904 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:25:19,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:19 BoogieIcfgContainer [2021-11-23 02:25:19,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:25:19,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:25:19,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:25:19,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:25:19,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:25:19" (1/3) ... [2021-11-23 02:25:19,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788bd3bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:19, skipping insertion in model container [2021-11-23 02:25:19,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:19" (2/3) ... [2021-11-23 02:25:19,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788bd3bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:19, skipping insertion in model container [2021-11-23 02:25:19,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:19" (3/3) ... [2021-11-23 02:25:19,935 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_1_2.i [2021-11-23 02:25:19,941 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:25:19,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:25:20,015 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:25:20,022 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 [2021-11-23 02:25:20,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:25:20,059 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) [2021-11-23 02:25:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 02:25:20,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:20,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 02:25:20,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash 3484809, now seen corresponding path program 1 times [2021-11-23 02:25:20,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:20,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601455352] [2021-11-23 02:25:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:20,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:25:20,193 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:25:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:25:20,225 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:25:20,226 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:25:20,228 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 02:25:20,230 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 02:25:20,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:25:20,235 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 02:25:20,238 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:25:20,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:25:20 BoogieIcfgContainer [2021-11-23 02:25:20,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:25:20,270 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:25:20,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:25:20,271 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:25:20,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:19" (3/4) ... [2021-11-23 02:25:20,275 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:25:20,275 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:25:20,277 INFO L158 Benchmark]: Toolchain (without parser) took 1189.25ms. Allocated memory is still 98.6MB. Free memory was 61.8MB in the beginning and 44.1MB in the end (delta: 17.7MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2021-11-23 02:25:20,279 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:25:20,280 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.52ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 73.5MB in the end (delta: -11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:25:20,281 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.30ms. Allocated memory is still 98.6MB. Free memory was 73.5MB in the beginning and 71.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:25:20,282 INFO L158 Benchmark]: Boogie Preprocessor took 26.41ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 70.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:25:20,288 INFO L158 Benchmark]: RCFGBuilder took 403.23ms. Allocated memory is still 98.6MB. Free memory was 70.4MB in the beginning and 57.7MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:25:20,290 INFO L158 Benchmark]: TraceAbstraction took 356.89ms. Allocated memory is still 98.6MB. Free memory was 57.2MB in the beginning and 44.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:25:20,291 INFO L158 Benchmark]: Witness Printer took 5.19ms. Allocated memory is still 98.6MB. Free memory was 44.6MB in the beginning and 44.1MB in the end (delta: 480.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:25:20,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.52ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 73.5MB in the end (delta: -11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.30ms. Allocated memory is still 98.6MB. Free memory was 73.5MB in the beginning and 71.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.41ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 70.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 403.23ms. Allocated memory is still 98.6MB. Free memory was 70.4MB in the beginning and 57.7MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 356.89ms. Allocated memory is still 98.6MB. Free memory was 57.2MB in the beginning and 44.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 5.19ms. Allocated memory is still 98.6MB. Free memory was 44.6MB in the beginning and 44.1MB in the end (delta: 480.4kB). 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 > -0.4f && IN < 0.4f) [L75] COND FALSE !(!cond) [L91] RET assume_abort_if_not(IN > -0.4f && IN < 0.4f) [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 [2021-11-23 02:25:20,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/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 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_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_1_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V --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 f2d1b02369a1f0b5046b14bc967075017a0d2438bdce8876a41d0f5cadb3a872 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:25:22,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:25:22,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:25:23,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:25:23,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:25:23,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:25:23,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:25:23,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:25:23,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:25:23,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:25:23,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:25:23,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:25:23,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:25:23,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:25:23,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:25:23,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:25:23,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:25:23,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:25:23,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:25:23,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:25:23,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:25:23,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:25:23,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:25:23,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:25:23,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:25:23,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:25:23,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:25:23,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:25:23,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:25:23,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:25:23,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:25:23,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:25:23,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:25:23,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:25:23,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:25:23,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:25:23,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:25:23,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:25:23,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:25:23,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:25:23,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:25:23,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:25:23,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:25:23,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:25:23,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:25:23,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:25:23,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:25:23,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:25:23,175 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:25:23,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:25:23,175 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:25:23,175 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:25:23,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:25:23,177 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:25:23,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:25:23,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:25:23,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:25:23,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:25:23,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:25:23,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:25:23,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:25:23,180 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:25:23,180 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:25:23,180 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:25:23,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:25:23,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:25:23,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:25:23,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:25:23,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:25:23,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:25:23,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:25:23,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:25:23,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:25:23,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:25:23,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:25:23,183 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:25:23,183 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:25:23,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:25:23,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:25:23,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:25:23,184 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_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2d1b02369a1f0b5046b14bc967075017a0d2438bdce8876a41d0f5cadb3a872 [2021-11-23 02:25:23,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:25:23,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:25:23,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:25:23,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:25:23,618 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:25:23,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/gcd_1+newton_1_2.i [2021-11-23 02:25:23,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/fc1cec8c8/6ea2f43db2cb4f7f8cba20c05c2759c8/FLAGf52b90da3 [2021-11-23 02:25:24,259 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:25:24,264 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i [2021-11-23 02:25:24,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/fc1cec8c8/6ea2f43db2cb4f7f8cba20c05c2759c8/FLAGf52b90da3 [2021-11-23 02:25:24,610 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/data/fc1cec8c8/6ea2f43db2cb4f7f8cba20c05c2759c8 [2021-11-23 02:25:24,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:25:24,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:25:24,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:25:24,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:25:24,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:25:24,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:24,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6956a982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24, skipping insertion in model container [2021-11-23 02:25:24,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:24,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:25:24,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:25:24,810 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[1226,1239] [2021-11-23 02:25:24,834 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[2786,2799] [2021-11-23 02:25:24,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:25:24,887 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:25:24,911 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[1226,1239] [2021-11-23 02:25:24,938 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_952bf21f-f781-45f8-ae3d-f8007bb35213/sv-benchmarks/c/combinations/gcd_1+newton_1_2.i[2786,2799] [2021-11-23 02:25:24,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:25:24,965 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:25:24,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24 WrapperNode [2021-11-23 02:25:24,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:25:24,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:25:24,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:25:24,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:25:24,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:24,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,009 INFO L137 Inliner]: procedures = 28, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 73 [2021-11-23 02:25:25,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:25:25,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:25:25,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:25:25,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:25:25,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:25:25,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:25:25,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:25:25,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:25:25,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (1/1) ... [2021-11-23 02:25:25,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:25:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:25:25,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:25:25,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:25:25,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:25:25,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:25:25,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:25:25,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:25:25,197 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:25:25,199 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:25:31,847 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:25:31,854 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:25:31,854 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:25:31,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:31 BoogieIcfgContainer [2021-11-23 02:25:31,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:25:31,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:25:31,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:25:31,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:25:31,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:25:24" (1/3) ... [2021-11-23 02:25:31,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686ffb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:31, skipping insertion in model container [2021-11-23 02:25:31,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:24" (2/3) ... [2021-11-23 02:25:31,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686ffb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:31, skipping insertion in model container [2021-11-23 02:25:31,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:31" (3/3) ... [2021-11-23 02:25:31,866 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_1_2.i [2021-11-23 02:25:31,872 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:25:31,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:25:31,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:25:31,923 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 [2021-11-23 02:25:31,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:25:31,944 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) [2021-11-23 02:25:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:25:31,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:31,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:31,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash 447749113, now seen corresponding path program 1 times [2021-11-23 02:25:31,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:25:31,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526397518] [2021-11-23 02:25:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:31,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:25:31,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:25:31,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:25:31,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:25:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:25:33,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:25:33,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:25:33,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:25:33,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526397518] [2021-11-23 02:25:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526397518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:33,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:33,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:25:33,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588415691] [2021-11-23 02:25:33,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:33,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:25:33,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:25:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:25:33,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:25:33,548 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) [2021-11-23 02:25:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:33,567 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-23 02:25:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:25:33,570 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 [2021-11-23 02:25:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:33,578 INFO L225 Difference]: With dead ends: 46 [2021-11-23 02:25:33,579 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 02:25:33,582 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 [2021-11-23 02:25:33,588 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 [2021-11-23 02:25:33,590 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] [2021-11-23 02:25:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 02:25:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 02:25:33,622 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) [2021-11-23 02:25:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 02:25:33,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-11-23 02:25:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:33,626 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 02:25:33,627 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) [2021-11-23 02:25:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 02:25:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:25:33,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:33,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:33,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 02:25:33,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:25:33,850 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:33,851 INFO L85 PathProgramCache]: Analyzing trace with hash 505007415, now seen corresponding path program 1 times [2021-11-23 02:25:33,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:25:33,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125933150] [2021-11-23 02:25:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:33,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:25:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:25:33,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:25:33,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_952bf21f-f781-45f8-ae3d-f8007bb35213/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process