./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_1_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_1_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/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 65d58fd3e8c5638a351c469fc6c6b86b0bc6efe1f0f08d6df11bfe5a3616f3a3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:43,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:43,370 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:57:43,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:43,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:43,402 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:43,403 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:43,403 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:43,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:43,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:43,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:43,406 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:43,407 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:43,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:43,408 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:57:43,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:43,409 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:43,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:43,410 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:43,410 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:57:43,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:43,411 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:57:43,412 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:43,412 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:57:43,413 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:43,413 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:43,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:43,414 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:43,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:43,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:43,416 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:43,416 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:57:43,416 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:43,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:43,417 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:43,417 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:57:43,417 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:43,417 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:43,418 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:43,418 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65d58fd3e8c5638a351c469fc6c6b86b0bc6efe1f0f08d6df11bfe5a3616f3a3 [2023-11-06 21:57:43,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:43,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:43,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:43,724 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:43,727 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:43,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/combinations/gcd_4+newton_1_2.i [2023-11-06 21:57:47,004 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:47,272 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:47,273 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i [2023-11-06 21:57:47,285 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data/f8bca00f6/ac6fc03f1db04172ba305f5870b7f304/FLAGfd287401c [2023-11-06 21:57:47,306 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data/f8bca00f6/ac6fc03f1db04172ba305f5870b7f304 [2023-11-06 21:57:47,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:47,319 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:47,324 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:47,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:47,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:47,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1969cbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47, skipping insertion in model container [2023-11-06 21:57:47,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,371 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:47,609 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[1224,1237] [2023-11-06 21:57:47,640 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[2806,2819] [2023-11-06 21:57:47,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:47,655 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:47,671 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[1224,1237] [2023-11-06 21:57:47,693 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[2806,2819] [2023-11-06 21:57:47,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:47,714 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:47,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47 WrapperNode [2023-11-06 21:57:47,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:47,717 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:47,717 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:47,717 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:47,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,787 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2023-11-06 21:57:47,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:47,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:47,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:47,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:47,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,807 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,832 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,837 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:47,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:47,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:47,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:47,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (1/1) ... [2023-11-06 21:57:47,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:47,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:47,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:47,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:47,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:47,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 21:57:47,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 21:57:48,051 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:48,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:48,359 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:48,368 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:48,369 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:57:48,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:48 BoogieIcfgContainer [2023-11-06 21:57:48,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:48,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:48,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:48,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:48,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:47" (1/3) ... [2023-11-06 21:57:48,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fb3cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:48, skipping insertion in model container [2023-11-06 21:57:48,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:47" (2/3) ... [2023-11-06 21:57:48,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fb3cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:48, skipping insertion in model container [2023-11-06 21:57:48,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:48" (3/3) ... [2023-11-06 21:57:48,384 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_1_2.i [2023-11-06 21:57:48,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:48,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 21:57:48,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:57:48,525 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;@4aa4b6d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:57:48,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 21:57:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:57:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:57:48,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:48,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:48,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:48,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1386425161, now seen corresponding path program 1 times [2023-11-06 21:57:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:48,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738780696] [2023-11-06 21:57:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:48,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:48,741 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 21:57:48,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:48,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738780696] [2023-11-06 21:57:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738780696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:48,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:48,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511205425] [2023-11-06 21:57:48,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:48,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:57:48,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:48,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:57:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:57:48,792 INFO L87 Difference]: Start difference. First operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:48,835 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-11-06 21:57:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:57:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 21:57:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:48,849 INFO L225 Difference]: With dead ends: 57 [2023-11-06 21:57:48,849 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:57:48,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 21:57:48,859 INFO L413 NwaCegarLoop]: 40 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, 40 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 21:57:48,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:57:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 21:57:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:57:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-06 21:57:48,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2023-11-06 21:57:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:48,901 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-06 21:57:48,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-06 21:57:48,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:57:48,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:48,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:48,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:57:48,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:48,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1329166859, now seen corresponding path program 1 times [2023-11-06 21:57:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:48,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342539267] [2023-11-06 21:57:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:57:48,938 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:57:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:57:48,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:57:48,993 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:57:48,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-06 21:57:48,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-06 21:57:48,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:57:49,002 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 21:57:49,006 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:57:49,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:57:49 BoogieIcfgContainer [2023-11-06 21:57:49,030 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:57:49,031 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:57:49,031 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:57:49,032 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:57:49,032 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:48" (3/4) ... [2023-11-06 21:57:49,035 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-06 21:57:49,036 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:57:49,038 INFO L158 Benchmark]: Toolchain (without parser) took 1718.45ms. Allocated memory was 136.3MB in the beginning and 174.1MB in the end (delta: 37.7MB). Free memory was 92.2MB in the beginning and 125.4MB in the end (delta: -33.2MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2023-11-06 21:57:49,038 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 136.3MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:57:49,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 391.86ms. Allocated memory is still 136.3MB. Free memory was 92.2MB in the beginning and 80.5MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 21:57:49,040 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.92ms. Allocated memory is still 136.3MB. Free memory was 80.5MB in the beginning and 78.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:57:49,041 INFO L158 Benchmark]: Boogie Preprocessor took 48.59ms. Allocated memory is still 136.3MB. Free memory was 78.4MB in the beginning and 77.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:57:49,041 INFO L158 Benchmark]: RCFGBuilder took 533.74ms. Allocated memory is still 136.3MB. Free memory was 77.2MB in the beginning and 65.6MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 21:57:49,042 INFO L158 Benchmark]: TraceAbstraction took 655.31ms. Allocated memory was 136.3MB in the beginning and 174.1MB in the end (delta: 37.7MB). Free memory was 64.9MB in the beginning and 126.3MB in the end (delta: -61.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:57:49,043 INFO L158 Benchmark]: Witness Printer took 5.48ms. Allocated memory is still 174.1MB. Free memory was 126.3MB in the beginning and 125.4MB in the end (delta: 900.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:57:49,047 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 136.3MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 391.86ms. Allocated memory is still 136.3MB. Free memory was 92.2MB in the beginning and 80.5MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.92ms. Allocated memory is still 136.3MB. Free memory was 80.5MB in the beginning and 78.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.59ms. Allocated memory is still 136.3MB. Free memory was 78.4MB in the beginning and 77.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 533.74ms. Allocated memory is still 136.3MB. Free memory was 77.2MB in the beginning and 65.6MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 655.31ms. Allocated memory was 136.3MB in the beginning and 174.1MB in the end (delta: 37.7MB). Free memory was 64.9MB in the beginning and 126.3MB in the end (delta: -61.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.48ms. Allocated memory is still 174.1MB. Free memory was 126.3MB in the beginning and 125.4MB in the end (delta: 900.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 100. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.4f && IN < 0.4f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.4f && IN < 0.4f) [L100] CALL, EXPR f(IN) [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=109, x=109] [L100] RET, EXPR f(IN) [L100] CALL, EXPR fp(IN) [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=109, x=109] [L100] RET, EXPR fp(IN) [L100] float x = IN - f(IN)/fp(IN); [L108] COND TRUE !(x < 0.1) VAL [IN=109] [L109] reach_error() VAL [IN=109] - UnprovableResult [Line: 27]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 33 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 40 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 40 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-06 21:57:49,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_1_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/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 65d58fd3e8c5638a351c469fc6c6b86b0bc6efe1f0f08d6df11bfe5a3616f3a3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:52,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:52,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-06 21:57:52,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:52,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:52,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:52,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:52,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:52,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:52,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:52,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:52,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:52,248 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:52,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:52,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:57:52,250 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:52,250 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:52,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:52,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:57:52,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:52,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:57:52,253 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:57:52,254 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 21:57:52,254 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 21:57:52,255 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:52,255 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:57:52,256 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:52,256 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:52,257 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:52,257 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:52,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:52,258 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:52,259 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:52,259 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:57:52,260 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 21:57:52,260 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 21:57:52,260 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:52,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:57:52,261 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:52,261 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:52,262 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 21:57:52,263 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:52,264 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65d58fd3e8c5638a351c469fc6c6b86b0bc6efe1f0f08d6df11bfe5a3616f3a3 [2023-11-06 21:57:52,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:52,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:52,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:52,696 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:52,696 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:52,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/combinations/gcd_4+newton_1_2.i [2023-11-06 21:57:55,949 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:56,221 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:56,222 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i [2023-11-06 21:57:56,231 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data/769c21f42/c87fe015026e4705932d3f32964e5a78/FLAG13b4b9d16 [2023-11-06 21:57:56,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/data/769c21f42/c87fe015026e4705932d3f32964e5a78 [2023-11-06 21:57:56,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:56,250 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:56,251 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:56,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:56,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:56,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d4f79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56, skipping insertion in model container [2023-11-06 21:57:56,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,284 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:56,494 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[1224,1237] [2023-11-06 21:57:56,553 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[2806,2819] [2023-11-06 21:57:56,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:56,584 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:56,607 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[1224,1237] [2023-11-06 21:57:56,630 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_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/sv-benchmarks/c/combinations/gcd_4+newton_1_2.i[2806,2819] [2023-11-06 21:57:56,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:56,651 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:56,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56 WrapperNode [2023-11-06 21:57:56,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:56,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:56,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:56,654 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:56,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,727 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 79 [2023-11-06 21:57:56,728 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:56,729 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:56,729 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:56,729 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:56,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,774 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,779 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,797 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:56,798 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:56,798 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:56,798 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:56,799 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (1/1) ... [2023-11-06 21:57:56,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:56,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:56,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:56,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 21:57:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:56,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 21:57:56,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 21:57:57,029 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:57,031 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:58:04,243 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:58:04,251 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:58:04,252 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:58:04,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:04 BoogieIcfgContainer [2023-11-06 21:58:04,255 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:58:04,258 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:58:04,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:58:04,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:58:04,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:56" (1/3) ... [2023-11-06 21:58:04,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cf0446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:04, skipping insertion in model container [2023-11-06 21:58:04,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:56" (2/3) ... [2023-11-06 21:58:04,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cf0446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:04, skipping insertion in model container [2023-11-06 21:58:04,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:04" (3/3) ... [2023-11-06 21:58:04,281 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_1_2.i [2023-11-06 21:58:04,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:58:04,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 21:58:04,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:04,367 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;@15e02d91, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:04,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 21:58:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:58:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:58:04,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:04,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:04,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:04,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1386425161, now seen corresponding path program 1 times [2023-11-06 21:58:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:04,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862429126] [2023-11-06 21:58:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:04,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:04,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 21:58:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:05,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:58:05,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:05,902 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 21:58:05,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:05,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:58:05,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862429126] [2023-11-06 21:58:05,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862429126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:05,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:05,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678583397] [2023-11-06 21:58:05,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:05,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:58:05,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:58:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:58:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:58:05,945 INFO L87 Difference]: Start difference. First operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:05,982 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-11-06 21:58:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:58:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 21:58:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:05,993 INFO L225 Difference]: With dead ends: 57 [2023-11-06 21:58:05,993 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:58:05,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 21:58:06,000 INFO L413 NwaCegarLoop]: 40 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, 40 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 21:58:06,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:58:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 21:58:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:58:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-06 21:58:06,043 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2023-11-06 21:58:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:06,043 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-06 21:58:06,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-06 21:58:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:58:06,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:06,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:06,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:06,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:06,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:06,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:06,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1329166859, now seen corresponding path program 1 times [2023-11-06 21:58:06,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:58:06,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474040543] [2023-11-06 21:58:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:06,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:58:06,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:58:06,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:58:06,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03541d6d-ee71-45a2-b3ce-cea00b62d8ed/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process