./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91 --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 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:54:00,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:54:01,113 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:54:01,125 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:54:01,126 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:54:01,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:54:01,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:54:01,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:54:01,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:54:01,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:54:01,182 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:54:01,183 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:54:01,183 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:54:01,184 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:54:01,185 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:54:01,185 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:54:01,186 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:54:01,186 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:54:01,187 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:54:01,188 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:54:01,188 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:54:01,189 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:54:01,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:54:01,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:54:01,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:54:01,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:54:01,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:54:01,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:54:01,193 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:54:01,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:54:01,194 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:54:01,194 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:54:01,195 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:54:01,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:54:01,196 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:54:01,196 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:54:01,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:54:01,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:54:01,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:54:01,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:54:01,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:54:01,199 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:54:01,200 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:54:01,200 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:54:01,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:54:01,201 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:54:01,201 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:54:01,202 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:54:01,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:54:01,203 INFO L153 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_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 [2023-11-24 23:54:01,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:54:01,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:54:01,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:54:01,492 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:54:01,493 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:54:01,494 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2023-11-24 23:54:04,688 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:54:04,925 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:54:04,925 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2023-11-24 23:54:04,934 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/data/a00038cf4/19c9c477f0cb453f87bcb04fcb1d94c5/FLAGc63a8e826 [2023-11-24 23:54:04,951 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/data/a00038cf4/19c9c477f0cb453f87bcb04fcb1d94c5 [2023-11-24 23:54:04,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:54:04,963 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:54:04,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:54:04,965 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:54:04,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:54:04,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:54:04" (1/1) ... [2023-11-24 23:54:04,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f2ac9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:04, skipping insertion in model container [2023-11-24 23:54:04,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:54:04" (1/1) ... [2023-11-24 23:54:05,005 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:54:05,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:54:05,297 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:54:05,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:54:05,391 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:54:05,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05 WrapperNode [2023-11-24 23:54:05,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:54:05,394 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:54:05,394 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:54:05,394 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:54:05,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,468 INFO L138 Inliner]: procedures = 17, calls = 142, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 158 [2023-11-24 23:54:05,469 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:54:05,470 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:54:05,470 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:54:05,470 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:54:05,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,515 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:54:05,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:54:05,521 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:54:05,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:54:05,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (1/1) ... [2023-11-24 23:54:05,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:54:05,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:05,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:54:05,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:54:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:54:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:54:05,658 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:54:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:54:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:54:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:54:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2023-11-24 23:54:05,661 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2023-11-24 23:54:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2023-11-24 23:54:05,662 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2023-11-24 23:54:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:54:05,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:54:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:54:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:54:05,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:54:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:54:05,829 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:54:05,831 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:54:06,634 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:54:06,679 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:54:06,680 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:54:06,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:54:06 BoogieIcfgContainer [2023-11-24 23:54:06,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:54:06,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:54:06,686 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:54:06,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:54:06,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:54:04" (1/3) ... [2023-11-24 23:54:06,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d643ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:54:06, skipping insertion in model container [2023-11-24 23:54:06,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:05" (2/3) ... [2023-11-24 23:54:06,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d643ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:54:06, skipping insertion in model container [2023-11-24 23:54:06,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:54:06" (3/3) ... [2023-11-24 23:54:06,696 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2023-11-24 23:54:06,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:54:06,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2023-11-24 23:54:06,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:54:06,792 INFO L357 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=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;@65733bbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:54:06,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-24 23:54:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 87 states have (on average 1.7816091954022988) internal successors, (155), 153 states have internal predecessors, (155), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-24 23:54:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:54:06,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:06,806 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:54:06,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_45_to_53_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_45_to_53_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2023-11-24 23:54:06,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1770724805, now seen corresponding path program 1 times [2023-11-24 23:54:06,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:06,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322031622] [2023-11-24 23:54:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:06,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:07,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:54:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850215233] [2023-11-24 23:54:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:07,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:07,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:07,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:07,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d07d36c-874f-4e6e-8262-21a3981f19ce/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:54:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:07,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-24 23:54:07,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:07,838 INFO L349 Elim1Store]: treesize reduction 267, result has 7.6 percent of original size [2023-11-24 23:54:07,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 71047 treesize of output 70930 [2023-11-24 23:54:19,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-24 23:54:19,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 23:54:22,137 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_1| Int)) (and (not (= |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_1| |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_1|)) (let ((.cse0 (select |c_#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_1|))) (= .cse0 (store (select (store (store |c_#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_1| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_1| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_1| (select .cse0 |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_1|)))))) is different from true [2023-11-24 23:54:24,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:24,553 INFO L349 Elim1Store]: treesize reduction 109, result has 32.3 percent of original size [2023-11-24 23:54:24,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 416 treesize of output 261 [2023-11-24 23:54:24,877 INFO L349 Elim1Store]: treesize reduction 148, result has 31.8 percent of original size [2023-11-24 23:54:24,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 232 treesize of output 206 [2023-11-24 23:54:25,214 INFO L349 Elim1Store]: treesize reduction 172, result has 28.6 percent of original size [2023-11-24 23:54:25,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 167 treesize of output 202 [2023-11-24 23:54:25,551 INFO L349 Elim1Store]: treesize reduction 204, result has 25.3 percent of original size [2023-11-24 23:54:25,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 150 treesize of output 204 [2023-11-24 23:54:25,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:26,118 INFO L349 Elim1Store]: treesize reduction 320, result has 29.4 percent of original size [2023-11-24 23:54:26,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 31 case distinctions, treesize of input 139 treesize of output 262 [2023-11-24 23:54:26,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:54:26,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 166 treesize of output 348 [2023-11-24 23:54:26,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 23:54:26,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 23:54:27,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 23:54:41,032 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:41,091 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,065 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,111 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,156 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,721 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,745 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,820 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,843 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:42,952 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:43,035 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:43,059 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:54:46,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:54:46,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:54:46,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:54:46,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:54:46,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 63 [2023-11-24 23:54:46,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:46,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:46,288 INFO L349 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2023-11-24 23:54:46,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 421 treesize of output 215 [2023-11-24 23:54:46,325 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-11-24 23:54:46,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 23 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 210 treesize of output 122 [2023-11-24 23:54:46,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 26 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 93 [2023-11-24 23:54:46,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 30 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 88 [2023-11-24 23:54:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:54:46,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 36 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2023-11-24 23:54:46,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 55 [2023-11-24 23:54:46,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:54:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-24 23:54:47,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:54:51,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322031622] [2023-11-24 23:54:51,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:54:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850215233] [2023-11-24 23:54:51,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850215233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:51,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787955591] [2023-11-24 23:54:51,961 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-24 23:54:51,961 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:54:51,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:54:51,970 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:54:51,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs