./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_3_8.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_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/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_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/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_c4b75698-1a30-4b6c-857e-16a5044028fa/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 6398dd839d77433d1687aba555077cd298c276d20f879ef7dc3c0a3d5c207e2a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:55:33,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:55:33,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:55:33,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:55:33,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:55:33,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:55:33,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:55:33,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:55:33,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:55:33,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:55:33,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:55:33,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:55:33,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:55:33,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:55:33,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:55:33,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:55:33,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:55:33,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:55:33,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:55:33,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:55:33,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:55:33,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:55:33,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:55:33,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:55:33,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:55:33,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:55:33,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:55:33,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:55:33,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:55:33,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:55:33,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:55:33,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:55:33,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:55:33,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:55:33,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:55:33,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:55:33,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:55:33,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:55:33,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:55:33,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:55:33,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:55:33,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:55:33,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:55:33,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:55:33,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:55:33,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:55:33,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:55:33,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:55:33,687 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:55:33,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:55:33,688 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:55:33,688 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:55:33,688 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:55:33,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:55:33,689 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:55:33,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:55:33,690 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:55:33,690 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:55:33,690 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:55:33,690 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:55:33,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:55:33,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:55:33,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:55:33,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:55:33,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:55:33,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:55:33,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:55:33,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:55:33,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:55:33,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:55:33,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:55:33,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:55:33,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:55:33,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:55:33,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:55:33,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:55:33,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:55:33,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:55:33,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:55:33,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:55:33,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:55:33,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:55:33,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:55:33,697 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_c4b75698-1a30-4b6c-857e-16a5044028fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6398dd839d77433d1687aba555077cd298c276d20f879ef7dc3c0a3d5c207e2a [2021-11-21 01:55:33,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:55:33,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:55:33,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:55:33,998 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:55:33,999 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:55:34,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/gcd_3+newton_3_8.i [2021-11-21 01:55:34,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/data/4e0661f05/e04ce4d429584fd09e1a92c611aee9ed/FLAG47b7c0083 [2021-11-21 01:55:34,598 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:55:34,599 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i [2021-11-21 01:55:34,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/data/4e0661f05/e04ce4d429584fd09e1a92c611aee9ed/FLAG47b7c0083 [2021-11-21 01:55:34,959 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/data/4e0661f05/e04ce4d429584fd09e1a92c611aee9ed [2021-11-21 01:55:34,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:55:34,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:55:34,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:55:34,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:55:34,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:55:34,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:34" (1/1) ... [2021-11-21 01:55:34,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2320c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:34, skipping insertion in model container [2021-11-21 01:55:34,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:34" (1/1) ... [2021-11-21 01:55:34,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:55:35,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:55:35,240 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_c4b75698-1a30-4b6c-857e-16a5044028fa/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[1226,1239] [2021-11-21 01:55:35,296 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_c4b75698-1a30-4b6c-857e-16a5044028fa/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[2862,2875] [2021-11-21 01:55:35,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:55:35,314 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:55:35,335 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_c4b75698-1a30-4b6c-857e-16a5044028fa/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[1226,1239] [2021-11-21 01:55:35,365 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_c4b75698-1a30-4b6c-857e-16a5044028fa/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[2862,2875] [2021-11-21 01:55:35,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:55:35,391 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:55:35,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35 WrapperNode [2021-11-21 01:55:35,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:55:35,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:55:35,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:55:35,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:55:35,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,455 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-11-21 01:55:35,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:55:35,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:55:35,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:55:35,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:55:35,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:55:35,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:55:35,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:55:35,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:55:35,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (1/1) ... [2021-11-21 01:55:35,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:55:35,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:35,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:55:35,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:55:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:55:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-21 01:55:35,608 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-21 01:55:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-21 01:55:35,608 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-21 01:55:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:55:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:55:35,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:55:35,684 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:55:35,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:55:35,892 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:55:35,961 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:55:35,961 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:55:35,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:35 BoogieIcfgContainer [2021-11-21 01:55:35,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:55:35,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:55:35,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:55:35,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:55:35,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:55:34" (1/3) ... [2021-11-21 01:55:35,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6059b6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:35, skipping insertion in model container [2021-11-21 01:55:35,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:35" (2/3) ... [2021-11-21 01:55:35,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6059b6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:35, skipping insertion in model container [2021-11-21 01:55:35,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:35" (3/3) ... [2021-11-21 01:55:35,973 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_8.i [2021-11-21 01:55:35,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:55:35,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:55:36,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:55:36,039 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 01:55:36,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:55:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:55:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:55:36,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:36,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:55:36,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:36,065 INFO L85 PathProgramCache]: Analyzing trace with hash -291944571, now seen corresponding path program 1 times [2021-11-21 01:55:36,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203043905] [2021-11-21 01:55:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:36,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:36,339 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 01:55:36,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:36,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203043905] [2021-11-21 01:55:36,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203043905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:36,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:36,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:55:36,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598641140] [2021-11-21 01:55:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:36,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:55:36,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:55:36,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:55:36,376 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 01:55:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:36,544 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-11-21 01:55:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:55:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2021-11-21 01:55:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:36,555 INFO L225 Difference]: With dead ends: 48 [2021-11-21 01:55:36,555 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 01:55:36,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:55:36,566 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:36,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 84 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:55:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 01:55:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-21 01:55:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:55:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-21 01:55:36,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2021-11-21 01:55:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:36,606 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-21 01:55:36,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 01:55:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-21 01:55:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:55:36,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:36,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:36,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:55:36,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:36,609 INFO L85 PathProgramCache]: Analyzing trace with hash -533010262, now seen corresponding path program 1 times [2021-11-21 01:55:36,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:36,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923906149] [2021-11-21 01:55:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:36,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:36,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:55:36,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496798517] [2021-11-21 01:55:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:36,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:36,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:36,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:36,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:55:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:36,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:55:36,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:55:47,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:55:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:55:56,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:56,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923906149] [2021-11-21 01:55:56,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:55:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496798517] [2021-11-21 01:55:56,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496798517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:55:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294511436] [2021-11-21 01:55:56,330 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:55:56,331 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:55:56,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:55:56,340 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:55:56,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:56:17,368 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:56:29,833 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:56:29,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:56:29,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-21 01:56:29,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463542440] [2021-11-21 01:56:29,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:56:29,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:56:29,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:56:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=142, Unknown=5, NotChecked=0, Total=182 [2021-11-21 01:56:29,838 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 01:57:19,197 WARN L227 SmtUtils]: Spent 47.68s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:57:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:19,282 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-21 01:57:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:57:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 7 [2021-11-21 01:57:19,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:19,284 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:57:19,284 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:57:19,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.9s TimeCoverageRelationStatistics Valid=41, Invalid=164, Unknown=5, NotChecked=0, Total=210 [2021-11-21 01:57:19,287 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:19,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 9 Unchecked, 0.8s Time] [2021-11-21 01:57:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:57:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 01:57:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:57:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-21 01:57:19,309 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2021-11-21 01:57:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-21 01:57:19,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 01:57:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-21 01:57:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:57:19,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:19,311 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:19,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:19,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:19,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:57:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash 583887909, now seen corresponding path program 2 times [2021-11-21 01:57:19,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:57:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142084520] [2021-11-21 01:57:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:19,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:57:19,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:57:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189685261] [2021-11-21 01:57:19,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:57:19,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:19,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:19,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:19,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:57:19,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:57:19,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 01:57:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:41,763 WARN L227 SmtUtils]: Spent 19.07s on a formula simplification. DAG size of input: 61 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:59:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:12,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:21,943 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (or (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse14 (mod (+ |ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (let ((.cse1 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse8 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse14) 256) 0))) (.cse9 (<= 0 |ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse11 (< 127 .cse14)) (.cse13 (mod (+ (* |ULTIMATE.start_gcd_test_~b#1| 255) .cse12) 256))) (let ((.cse0 (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse13) 256) 0))) (.cse2 (< |ULTIMATE.start_gcd_test_~b#1| 0)) (.cse3 (<= .cse13 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse5 (or .cse1 .cse8 .cse9 .cse10 .cse11)) (.cse4 (< 127 .cse13)) (.cse6 (mod .cse12 256))) (and (or (and (or .cse0 .cse1 .cse2 .cse3 .cse4) .cse5) (<= .cse6 127)) (or (let ((.cse7 (= .cse12 0))) (and (or (and (or .cse0 .cse1 .cse2 .cse3 .cse7) .cse5) .cse4) (or (<= .cse6 |c_ULTIMATE.start_main1_~x~0#1|) (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= (mod (mod |ULTIMATE.start_gcd_test_~b#1| .cse6) 256) 0))) (or .cse1 .cse8 .cse9 .cse10 .cse7 .cse11))) (< 127 .cse6))))))) (= |ULTIMATE.start_gcd_test_~b#1| 0)))) is different from false [2021-11-21 02:01:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 02:01:22,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:01:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142084520] [2021-11-21 02:01:22,018 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 02:01:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189685261] [2021-11-21 02:01:22,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189685261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637739652] [2021-11-21 02:01:22,021 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 02:01:22,021 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:01:22,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:01:22,022 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:01:22,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:01:30,565 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:01:39,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 02:01:39,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 02:01:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-21 02:01:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577889835] [2021-11-21 02:01:39,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 02:01:39,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 02:01:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 02:01:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 02:01:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=166, Unknown=3, NotChecked=26, Total=240 [2021-11-21 02:01:39,502 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 02:01:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:01:42,076 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-21 02:01:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 02:01:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 8 [2021-11-21 02:01:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:01:42,078 INFO L225 Difference]: With dead ends: 32 [2021-11-21 02:01:42,078 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 02:01:42,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=45, Invalid=166, Unknown=3, NotChecked=26, Total=240 [2021-11-21 02:01:42,080 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 02:01:42,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 172 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 21 Unchecked, 2.5s Time] [2021-11-21 02:01:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 02:01:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-21 02:01:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 02:01:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-21 02:01:42,088 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-11-21 02:01:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:01:42,088 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-21 02:01:42,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 02:01:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-21 02:01:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 02:01:42,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:01:42,089 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-21 02:01:42,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 02:01:42,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:42,295 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:01:42,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:01:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash 445311173, now seen corresponding path program 3 times [2021-11-21 02:01:42,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 02:01:42,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133337300] [2021-11-21 02:01:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:01:42,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 02:01:42,305 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 02:01:42,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338413025] [2021-11-21 02:01:42,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:01:42,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:42,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:01:42,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:01:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b75698-1a30-4b6c-857e-16a5044028fa/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 02:01:42,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:01:42,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 02:01:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:08,395 WARN L227 SmtUtils]: Spent 23.72s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:05:38,751 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_34|) 256))) (let ((.cse3 (+ (- 256) .cse4))) (and (let ((.cse1 (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse0 (= .cse1 0))) (or (and .cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse1 256))) (and (let ((.cse2 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256))) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (= (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse1) 256) .cse2)) (and (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse1) 256) .cse2)))) (not .cse0))))) (< 127 .cse4) (let ((.cse5 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse3))) (or (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse5 256))) (and (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse5 .cse4) 256)) (not (= .cse5 0))))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_34|) 256))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= .cse6 127) (not (= 0 .cse6)) (let ((.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse6))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse7 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (and (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (not (= .cse7 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse7 (* .cse6 255)) 256))))))))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (let ((.cse10 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse9 (mod (mod (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_34|) 256))) (and (let ((.cse8 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse9))) (or (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse8 256))) (and (not (= .cse8 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse8 (* .cse9 255)) 256))))) (not (= .cse9 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse9 |c_ULTIMATE.start_gcd_test_~a#1|) 256))))) (<= .cse10 127)) (and (< 127 .cse10) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse11 (+ (- 256) (mod (+ (* |v_ULTIMATE.start_gcd_test_~a#1_34| 255) (mod (+ (- 256) (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256)) |v_ULTIMATE.start_gcd_test_~a#1_34|)) 256)))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse11) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (let ((.cse12 (mod .cse11 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse13 (= .cse12 0))) (or (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse12 256)) .cse13) (and (= (mod (+ .cse12 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256) (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (not .cse13)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse18 (mod (+ |v_ULTIMATE.start_gcd_test_~a#1_34| (mod (+ (- 256) (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256)) |v_ULTIMATE.start_gcd_test_~a#1_34|)) 256))) (let ((.cse17 (+ (- 256) .cse18))) (let ((.cse14 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse17))) (and (not (= .cse14 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (let ((.cse15 (mod .cse17 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse16 (= 0 .cse15))) (or (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse15 256)) .cse16) (and (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse15) 256) (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (not .cse16))))) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse14 .cse18) 256))))))))))) (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-21 02:05:42,301 WARN L860 $PredicateComparison]: unable to prove that (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_34|) 256))) (let ((.cse3 (+ (- 256) .cse4))) (and (let ((.cse1 (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse0 (= .cse1 0))) (or (and .cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse1 256))) (and (let ((.cse2 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256))) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (= (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse1) 256) .cse2)) (and (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse1) 256) .cse2)))) (not .cse0))))) (< 127 .cse4) (let ((.cse5 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse3))) (or (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse5 256))) (and (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse5 .cse4) 256)) (not (= .cse5 0))))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_34|) 256))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= .cse6 127) (not (= 0 .cse6)) (let ((.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse6))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse7 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|)) (and (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (not (= .cse7 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse7 (* .cse6 255)) 256))))))))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (let ((.cse10 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse9 (mod (mod (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_34|) 256))) (and (let ((.cse8 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse9))) (or (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse8 256))) (and (not (= .cse8 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse8 (* .cse9 255)) 256))))) (not (= .cse9 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse9 |c_ULTIMATE.start_gcd_test_~a#1|) 256))))) (<= .cse10 127)) (and (< 127 .cse10) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse11 (+ (- 256) (mod (+ (* |v_ULTIMATE.start_gcd_test_~a#1_34| 255) (mod (+ (- 256) (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256)) |v_ULTIMATE.start_gcd_test_~a#1_34|)) 256)))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse11) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_34|) (let ((.cse12 (mod .cse11 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse13 (= .cse12 0))) (or (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse12 256)) .cse13) (and (= (mod (+ .cse12 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256) (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (not .cse13)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_34| Int)) (let ((.cse18 (mod (+ |v_ULTIMATE.start_gcd_test_~a#1_34| (mod (+ (- 256) (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256)) |v_ULTIMATE.start_gcd_test_~a#1_34|)) 256))) (let ((.cse17 (+ (- 256) .cse18))) (let ((.cse14 (mod |v_ULTIMATE.start_gcd_test_~a#1_34| .cse17))) (and (not (= .cse14 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_34| 0) (let ((.cse15 (mod .cse17 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse16 (= 0 .cse15))) (or (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse15 256)) .cse16) (and (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse15) 256) (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (not .cse16))))) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse14 .cse18) 256))))))))))) (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from true