./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_2_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bef70c39331e78595b45dbc9116e80e68130a83e4d55fdf4189b866d036d57fe --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:06:28,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:06:28,324 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:06:28,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:06:28,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:06:28,357 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:06:28,358 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:06:28,358 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:06:28,359 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:06:28,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:06:28,360 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:06:28,361 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:06:28,361 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:06:28,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:06:28,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:06:28,363 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:06:28,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:06:28,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:06:28,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:06:28,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:06:28,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:06:28,366 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:06:28,367 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:06:28,367 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:06:28,368 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:06:28,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:06:28,369 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:06:28,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:06:28,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:06:28,370 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:06:28,371 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:06:28,371 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:06:28,371 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:06:28,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:06:28,372 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:06:28,373 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:06:28,373 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:06:28,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:06:28,373 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:06:28,374 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bef70c39331e78595b45dbc9116e80e68130a83e4d55fdf4189b866d036d57fe [2023-11-06 23:06:28,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:06:28,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:06:28,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:06:28,643 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:06:28,644 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:06:28,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/combinations/gcd_1+newton_2_5.i [2023-11-06 23:06:31,665 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:06:31,921 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:06:31,921 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i [2023-11-06 23:06:31,930 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/data/22004ee70/2d207bf01eea4b5cacce4ee5781e6b46/FLAG25a4cd47f [2023-11-06 23:06:31,943 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/data/22004ee70/2d207bf01eea4b5cacce4ee5781e6b46 [2023-11-06 23:06:31,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:06:31,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:06:31,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:06:31,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:06:31,958 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:06:31,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:31" (1/1) ... [2023-11-06 23:06:31,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdad5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:31, skipping insertion in model container [2023-11-06 23:06:31,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:06:31" (1/1) ... [2023-11-06 23:06:31,987 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:06:32,139 WARN L240 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_fc4b04ae-7e5c-4335-a855-18405a9fc262/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[1226,1239] [2023-11-06 23:06:32,165 WARN L240 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_fc4b04ae-7e5c-4335-a855-18405a9fc262/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[2807,2820] [2023-11-06 23:06:32,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:06:32,185 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:06:32,197 WARN L240 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_fc4b04ae-7e5c-4335-a855-18405a9fc262/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[1226,1239] [2023-11-06 23:06:32,208 WARN L240 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_fc4b04ae-7e5c-4335-a855-18405a9fc262/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[2807,2820] [2023-11-06 23:06:32,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:06:32,224 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:06:32,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32 WrapperNode [2023-11-06 23:06:32,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:06:32,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:06:32,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:06:32,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:06:32,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,279 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2023-11-06 23:06:32,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:06:32,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:06:32,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:06:32,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:06:32,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,292 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,292 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,302 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:06:32,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:06:32,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:06:32,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:06:32,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (1/1) ... [2023-11-06 23:06:32,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:06:32,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:32,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:06:32,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:06:32,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:06:32,386 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-06 23:06:32,386 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-06 23:06:32,386 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-06 23:06:32,386 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-06 23:06:32,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:06:32,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:06:32,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:06:32,458 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:06:32,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:06:32,635 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:06:32,642 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:06:32,642 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:06:32,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:32 BoogieIcfgContainer [2023-11-06 23:06:32,644 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:06:32,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:06:32,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:06:32,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:06:32,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:06:31" (1/3) ... [2023-11-06 23:06:32,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f22ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:32, skipping insertion in model container [2023-11-06 23:06:32,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:06:32" (2/3) ... [2023-11-06 23:06:32,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f22ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:06:32, skipping insertion in model container [2023-11-06 23:06:32,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:06:32" (3/3) ... [2023-11-06 23:06:32,671 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_5.i [2023-11-06 23:06:32,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:06:32,700 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 23:06:32,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:06:32,774 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b3c8c65, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:06:32,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 23:06:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:06:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:06:32,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:32,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:32,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:32,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:32,792 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2023-11-06 23:06:32,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:32,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720940836] [2023-11-06 23:06:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:32,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:32,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:32,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229305861] [2023-11-06 23:06:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:32,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:32,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:32,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:06:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:33,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:06:33,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:33,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720940836] [2023-11-06 23:06:33,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:33,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229305861] [2023-11-06 23:06:33,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229305861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:33,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:33,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:06:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359262280] [2023-11-06 23:06:33,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:33,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:06:33,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:06:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:06:33,089 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2023-11-06 23:06:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:33,112 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-11-06 23:06:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:06:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 11 [2023-11-06 23:06:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:33,121 INFO L225 Difference]: With dead ends: 66 [2023-11-06 23:06:33,122 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 23:06:33,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:06:33,129 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:33,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:06:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 23:06:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 23:06:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:06:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-06 23:06:33,167 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2023-11-06 23:06:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:33,167 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-06 23:06:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2023-11-06 23:06:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-06 23:06:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:06:33,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:33,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:33,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:33,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:06:33,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:33,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2023-11-06 23:06:33,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665746652] [2023-11-06 23:06:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:33,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:33,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326321665] [2023-11-06 23:06:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:33,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:33,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:33,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:33,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:06:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:33,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:06:33,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:33,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665746652] [2023-11-06 23:06:33,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326321665] [2023-11-06 23:06:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326321665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:33,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:06:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045888455] [2023-11-06 23:06:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:06:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:06:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:06:33,549 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2023-11-06 23:06:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:33,565 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-06 23:06:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:06:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2023-11-06 23:06:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:33,566 INFO L225 Difference]: With dead ends: 36 [2023-11-06 23:06:33,567 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 23:06:33,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:06:33,569 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:33,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 55 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:06:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 23:06:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-06 23:06:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:06:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-11-06 23:06:33,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2023-11-06 23:06:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:33,578 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-11-06 23:06:33,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2023-11-06 23:06:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-11-06 23:06:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 23:06:33,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:33,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:33,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:33,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:33,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:33,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2023-11-06 23:06:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903283443] [2023-11-06 23:06:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:33,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:33,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971036711] [2023-11-06 23:06:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:33,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:33,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:33,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:33,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:06:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:33,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:06:33,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:33,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:34,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:34,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903283443] [2023-11-06 23:06:34,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:34,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971036711] [2023-11-06 23:06:34,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971036711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:34,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:34,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-11-06 23:06:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91308645] [2023-11-06 23:06:34,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:34,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:06:34,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:06:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:06:34,009 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-06 23:06:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:34,077 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-11-06 23:06:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:06:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 12 [2023-11-06 23:06:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:34,079 INFO L225 Difference]: With dead ends: 36 [2023-11-06 23:06:34,079 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 23:06:34,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:06:34,081 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:34,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 155 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:06:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 23:06:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-06 23:06:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 23:06:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-11-06 23:06:34,088 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2023-11-06 23:06:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:34,089 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-11-06 23:06:34,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-06 23:06:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-11-06 23:06:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 23:06:34,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:34,090 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:34,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:34,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:34,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:34,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:34,297 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2023-11-06 23:06:34,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:34,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356696459] [2023-11-06 23:06:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:34,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:34,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:34,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608126863] [2023-11-06 23:06:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:34,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:34,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc4b04ae-7e5c-4335-a855-18405a9fc262/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:06:39,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:39,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 23:06:39,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:02,380 WARN L839 $PredicateComparison]: unable to prove that (exists ((v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|v_ULTIMATE.start_gcd_test_~a#1_16| Int)) (let ((.cse4 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| |v_ULTIMATE.start_gcd_test_~a#1_16|))) (let ((.cse0 (mod .cse4 256))) (let ((.cse5 (mod |v_ULTIMATE.start_gcd_test_~a#1_16| .cse0))) (let ((.cse1 (* 256 v_y_1)) (.cse2 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_15|)) (.cse3 (mod .cse5 256))) (and (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_16|) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (<= 0 (+ .cse1 .cse2 128)) (= (mod (+ .cse1 .cse2) |v_ULTIMATE.start_gcd_test_~a#1_16|) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| 127) (<= (+ .cse1 .cse2 1) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| .cse3) (<= .cse3 127) (<= 128 (mod (+ (* 255 .cse4) .cse5) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|))))))) is different from false [2023-11-06 23:08:25,518 WARN L839 $PredicateComparison]: unable to prove that (exists ((v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|v_ULTIMATE.start_gcd_test_~a#1_16| Int)) (let ((.cse4 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| |v_ULTIMATE.start_gcd_test_~a#1_16|))) (let ((.cse0 (mod .cse4 256))) (let ((.cse1 (* 256 v_y_1)) (.cse2 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_15|)) (.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_16| .cse0))) (and (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_16|) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (<= 0 (+ .cse1 .cse2 128)) (= (mod (+ .cse1 .cse2) |v_ULTIMATE.start_gcd_test_~a#1_16|) 0) (= (mod .cse3 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| 127) (<= (+ .cse1 .cse2 1) 0) (<= 128 (mod (+ (* 255 .cse4) .cse3) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|)))))) is different from false [2023-11-06 23:08:50,469 WARN L839 $PredicateComparison]: unable to prove that (exists ((v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|v_ULTIMATE.start_gcd_test_~a#1_16| Int)) (let ((.cse4 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| |v_ULTIMATE.start_gcd_test_~a#1_16|))) (let ((.cse2 (mod .cse4 256))) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_15|)) (.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_16| .cse2))) (and (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_16|) (<= 0 (+ .cse0 .cse1 128)) (= .cse2 |c_ULTIMATE.start_gcd_test_#res#1|) (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_16|) 0) (= (mod .cse3 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| 127) (<= (+ .cse0 .cse1 1) 0) (<= 128 (mod (+ (* 255 .cse4) .cse3) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|)))))) is different from false [2023-11-06 23:09:12,690 WARN L839 $PredicateComparison]: unable to prove that (exists ((v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|v_ULTIMATE.start_gcd_test_~a#1_16| Int)) (let ((.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| |v_ULTIMATE.start_gcd_test_~a#1_16|))) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_15|)) (.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_16| (mod .cse3 256)))) (and (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_16|) (<= 0 (+ .cse0 .cse1 128)) (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_16|) 0) (= (mod .cse2 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| 127) (<= (+ .cse0 .cse1 1) 0) (<= 128 (mod (+ (* 255 .cse3) .cse2) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|))))) is different from false [2023-11-06 23:09:12,744 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_y_1 Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|v_ULTIMATE.start_gcd_test_~a#1_16| Int)) (let ((.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| |v_ULTIMATE.start_gcd_test_~a#1_16|))) (let ((.cse0 (* 256 v_y_1)) (.cse1 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_15|)) (.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_16| (mod .cse3 256)))) (and (<= 1 |v_ULTIMATE.start_gcd_test_~a#1_16|) (<= 0 (+ .cse0 .cse1 128)) (= (mod (+ .cse0 .cse1) |v_ULTIMATE.start_gcd_test_~a#1_16|) 0) (= (mod .cse2 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| 127) (<= (+ .cse0 .cse1 1) 0) (<= 128 (mod (+ (* 255 .cse3) .cse2) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|))))) is different from true [2023-11-06 23:09:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-06 23:09:32,632 INFO L327 TraceCheckSpWp]: Computing backward predicates...