./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56632fc3bb2b6db322c5e40eff8fe15b1c7affe1d35304d711252a046867d952 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:45:23,051 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:45:23,126 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Overflow-32bit-Taipan_Default.epf [2024-11-13 23:45:23,132 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:45:23,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:45:23,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:45:23,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:45:23,155 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:45:23,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:45:23,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:45:23,158 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:45:23,159 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:45:23,159 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:45:23,159 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:45:23,159 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:45:23,159 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:45:23,160 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:45:23,161 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:45:23,161 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:45:23,161 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:45:23,161 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:45:23,161 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:45:23,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 23:45:23,162 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 23:45:23,163 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:45:23,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:45:23,163 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:45:23,163 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:45:23,163 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:45:23,163 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:45:23,163 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:45:23,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:45:23,165 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56632fc3bb2b6db322c5e40eff8fe15b1c7affe1d35304d711252a046867d952 [2024-11-13 23:45:23,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:45:23,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:45:23,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:45:23,596 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:45:23,597 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:45:23,600 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd.c Unable to find full path for "g++" [2024-11-13 23:45:25,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:45:25,860 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:45:25,861 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd.c [2024-11-13 23:45:25,868 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/data/578bdcf36/7fd6dcb80f434e06b51010601115d006/FLAG2ecfda6eb [2024-11-13 23:45:25,883 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/data/578bdcf36/7fd6dcb80f434e06b51010601115d006 [2024-11-13 23:45:25,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:45:25,888 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:45:25,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:45:25,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:45:25,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:45:25,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:45:25" (1/1) ... [2024-11-13 23:45:25,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5c74a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:25, skipping insertion in model container [2024-11-13 23:45:25,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:45:25" (1/1) ... [2024-11-13 23:45:25,917 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:45:26,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:45:26,158 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:45:26,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:45:26,212 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:45:26,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26 WrapperNode [2024-11-13 23:45:26,213 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:45:26,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:45:26,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:45:26,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:45:26,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,263 INFO L138 Inliner]: procedures = 16, calls = 114, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 151 [2024-11-13 23:45:26,264 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:45:26,264 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:45:26,264 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:45:26,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:45:26,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,289 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,295 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,299 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:45:26,300 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:45:26,300 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:45:26,300 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:45:26,302 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (1/1) ... [2024-11-13 23:45:26,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:45:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:26,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:45:26,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:45:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:45:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-11-13 23:45:26,400 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-11-13 23:45:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-13 23:45:26,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-13 23:45:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:45:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:45:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:45:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:45:26,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:45:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:45:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 23:45:26,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 23:45:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:45:26,541 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:45:26,544 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:45:27,520 INFO L? ?]: Removed 165 outVars from TransFormulas that were not future-live. [2024-11-13 23:45:27,520 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:45:27,572 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:45:27,572 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 23:45:27,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:45:27 BoogieIcfgContainer [2024-11-13 23:45:27,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:45:27,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:45:27,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:45:27,582 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:45:27,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:45:25" (1/3) ... [2024-11-13 23:45:27,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3444613d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:45:27, skipping insertion in model container [2024-11-13 23:45:27,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:45:26" (2/3) ... [2024-11-13 23:45:27,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3444613d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:45:27, skipping insertion in model container [2024-11-13 23:45:27,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:45:27" (3/3) ... [2024-11-13 23:45:27,586 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd.c [2024-11-13 23:45:27,601 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:45:27,603 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_egcd.c that has 4 procedures, 145 locations, 1 initial locations, 0 loop locations, and 56 error locations. [2024-11-13 23:45:27,667 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:45:27,686 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a87132, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:45:27,686 INFO L334 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2024-11-13 23:45:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 74 states have (on average 1.7972972972972974) internal successors, (133), 131 states have internal predecessors, (133), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 23:45:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 23:45:27,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:27,705 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:27,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_33_to_48_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_33_to_48_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_33_to_48_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 23:45:27,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1223583593, now seen corresponding path program 1 times [2024-11-13 23:45:27,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:27,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855511140] [2024-11-13 23:45:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:45:27,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882437952] [2024-11-13 23:45:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:27,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:27,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:27,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea30fad2-ace1-4d87-920f-7847e1abec13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:45:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:28,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 23:45:28,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:28,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:45:28,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 469 treesize of output 469 [2024-11-13 23:45:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:45:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:45:30,049 INFO L224 Elim1Store]: Index analysis took 134 ms