./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 a0165632 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_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bef70c39331e78595b45dbc9116e80e68130a83e4d55fdf4189b866d036d57fe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:44:35,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:44:35,619 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:44:35,625 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:44:35,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:44:35,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:44:35,670 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:44:35,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:44:35,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:44:35,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:44:35,674 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:44:35,675 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:44:35,675 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:44:35,676 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:44:35,676 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:44:35,676 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:44:35,680 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:44:35,680 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:44:35,681 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:44:35,681 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:44:35,682 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:44:35,686 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:44:35,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:44:35,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:44:35,687 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:44:35,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:44:35,688 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:44:35,688 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:44:35,689 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:44:35,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:44:35,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:44:35,691 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:44:35,692 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:44:35,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:44:35,695 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:44:35,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:44:35,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:44:35,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:44:35,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:44:35,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:44:35,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:44:35,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:44:35,698 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:44:35,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:44:35,698 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:44:35,699 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:44:35,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:44:35,700 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bef70c39331e78595b45dbc9116e80e68130a83e4d55fdf4189b866d036d57fe [2024-11-09 04:44:36,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:44:36,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:44:36,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:44:36,210 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:44:36,211 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:44:36,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/gcd_1+newton_2_5.i Unable to find full path for "g++" [2024-11-09 04:44:38,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:44:39,235 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:44:39,236 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i [2024-11-09 04:44:39,248 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data/29630f4ae/3b76aa8446f34a4c913b53a2fb3b1bf9/FLAGa12cafaf4 [2024-11-09 04:44:39,276 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data/29630f4ae/3b76aa8446f34a4c913b53a2fb3b1bf9 [2024-11-09 04:44:39,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:44:39,282 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:44:39,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:44:39,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:44:39,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:44:39,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3936dba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39, skipping insertion in model container [2024-11-09 04:44:39,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:44:39,682 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[1226,1239] [2024-11-09 04:44:39,726 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[2807,2820] [2024-11-09 04:44:39,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:44:39,743 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:44:39,768 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[1226,1239] [2024-11-09 04:44:39,798 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[2807,2820] [2024-11-09 04:44:39,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:44:39,834 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:44:39,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39 WrapperNode [2024-11-09 04:44:39,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:44:39,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:44:39,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:44:39,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:44:39,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,903 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2024-11-09 04:44:39,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:44:39,908 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:44:39,908 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:44:39,909 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:44:39,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,962 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,965 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:44:39,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:44:39,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:44:39,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:44:39,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (1/1) ... [2024-11-09 04:44:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:44:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:44:40,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:44:40,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:44:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:44:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2024-11-09 04:44:40,086 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2024-11-09 04:44:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-09 04:44:40,087 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-09 04:44:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:44:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:44:40,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:44:40,218 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:44:40,225 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:44:40,630 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-11-09 04:44:40,630 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:44:40,766 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:44:40,767 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:44:40,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:44:40 BoogieIcfgContainer [2024-11-09 04:44:40,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:44:40,778 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:44:40,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:44:40,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:44:40,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:44:39" (1/3) ... [2024-11-09 04:44:40,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78799524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:44:40, skipping insertion in model container [2024-11-09 04:44:40,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:44:39" (2/3) ... [2024-11-09 04:44:40,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78799524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:44:40, skipping insertion in model container [2024-11-09 04:44:40,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:44:40" (3/3) ... [2024-11-09 04:44:40,791 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_5.i [2024-11-09 04:44:40,814 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:44:40,814 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 04:44:40,899 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:44:40,910 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53e3214f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:44:40,910 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 04:44:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 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) [2024-11-09 04:44:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:44:40,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:44:40,933 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:44:40,934 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:44:40,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:44:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash 455660133, now seen corresponding path program 1 times [2024-11-09 04:44:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:44:40,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194628806] [2024-11-09 04:44:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:44:40,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:44:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:44:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:44:41,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:44:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194628806] [2024-11-09 04:44:41,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194628806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:44:41,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:44:41,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:44:41,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909861345] [2024-11-09 04:44:41,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:44:41,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:44:41,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:44:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:44:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:44:41,554 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-11-09 04:44:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:44:41,663 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-11-09 04:44:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:44:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:44:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:44:41,677 INFO L225 Difference]: With dead ends: 38 [2024-11-09 04:44:41,678 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 04:44:41,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:44:41,686 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:44:41,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:44:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 04:44:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 04:44:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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) [2024-11-09 04:44:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 04:44:41,750 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2024-11-09 04:44:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:44:41,750 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 04:44:41,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-11-09 04:44:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 04:44:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:44:41,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:44:41,754 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:44:41,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:44:41,755 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:44:41,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:44:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash -460632374, now seen corresponding path program 1 times [2024-11-09 04:44:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:44:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878341483] [2024-11-09 04:44:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:44:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:44:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:44:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:44:42,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:44:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878341483] [2024-11-09 04:44:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878341483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:44:42,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556523624] [2024-11-09 04:44:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:44:42,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:44:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:44:42,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:44:42,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:44:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:44:42,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:44:42,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:44:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:44:42,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:44:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:44:42,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556523624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:44:42,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723922791] [2024-11-09 04:44:42,744 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 04:44:42,745 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:44:42,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:44:42,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:44:42,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:44:50,740 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:44:52,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117#true' at error location [2024-11-09 04:44:52,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:44:52,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:44:52,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-09 04:44:52,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215931077] [2024-11-09 04:44:52,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:44:52,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:44:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:44:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:44:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:44:52,932 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2024-11-09 04:44:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:44:53,705 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-09 04:44:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:44:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 [2024-11-09 04:44:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:44:53,712 INFO L225 Difference]: With dead ends: 30 [2024-11-09 04:44:53,712 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 04:44:53,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:44:53,718 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:44:53,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:44:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 04:44:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 04:44:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2024-11-09 04:44:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-09 04:44:53,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 9 [2024-11-09 04:44:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:44:53,737 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-09 04:44:53,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2024-11-09 04:44:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-09 04:44:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 04:44:53,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:44:53,743 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:44:53,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:44:53,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:44:53,950 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:44:53,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:44:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash -549435921, now seen corresponding path program 2 times [2024-11-09 04:44:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:44:53,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503941321] [2024-11-09 04:44:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:44:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:44:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 04:44:54,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85141806] [2024-11-09 04:44:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:44:54,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:44:54,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:44:54,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:44:54,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:45:04,339 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:45:04,339 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:45:04,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 04:45:04,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:45:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:14,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:46:52,970 WARN L286 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 123 DAG size of output: 120 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:48:17,296 WARN L286 SmtUtils]: Spent 27.81s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:48:41,953 WARN L286 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:49:02,225 WARN L286 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 9 DAG size of output: 4 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:49:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:49:02,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:49:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503941321] [2024-11-09 04:49:02,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 04:49:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85141806] [2024-11-09 04:49:02,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85141806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:49:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338320187] [2024-11-09 04:49:02,232 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 04:49:02,233 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:49:02,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:49:02,233 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:49:02,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:49:07,802 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:49:14,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '255#true' at error location [2024-11-09 04:49:14,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:49:14,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:49:14,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2024-11-09 04:49:14,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659519118] [2024-11-09 04:49:14,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:49:14,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:49:14,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:49:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:49:14,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=195, Unknown=3, NotChecked=0, Total=240 [2024-11-09 04:49:14,685 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2024-11-09 04:49:34,372 WARN L286 SmtUtils]: Spent 16.52s on a formula simplification. DAG size of input: 43 DAG size of output: 27 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 04:49:36,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:49:39,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 04:49:41,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-09 04:49:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:49:42,464 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-09 04:49:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:49:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 [2024-11-09 04:49:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:49:42,469 INFO L225 Difference]: With dead ends: 26 [2024-11-09 04:49:42,469 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 04:49:42,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 131.1s TimeCoverageRelationStatistics Valid=46, Invalid=222, Unknown=4, NotChecked=0, Total=272 [2024-11-09 04:49:42,471 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:49:42,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2024-11-09 04:49:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 04:49:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 04:49:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 8 states have (on average 1.0) internal successors, (8), 8 states have internal predecessors, (8), 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) [2024-11-09 04:49:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-09 04:49:42,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2024-11-09 04:49:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:49:42,478 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-09 04:49:42,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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) [2024-11-09 04:49:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-09 04:49:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 04:49:42,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:49:42,481 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:49:42,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 04:49:42,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:49:42,682 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:49:42,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:49:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash 235847532, now seen corresponding path program 1 times [2024-11-09 04:49:42,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:49:42,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177655072] [2024-11-09 04:49:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:42,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:49:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 04:49:42,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 04:49:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 04:49:42,719 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 04:49:42,720 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 04:49:42,721 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-09 04:49:42,723 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-09 04:49:42,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:49:42,728 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2024-11-09 04:49:42,755 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 04:49:42,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:49:42 BoogieIcfgContainer [2024-11-09 04:49:42,763 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 04:49:42,764 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 04:49:42,764 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 04:49:42,764 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 04:49:42,765 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:44:40" (3/4) ... [2024-11-09 04:49:42,769 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-09 04:49:42,772 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 04:49:42,773 INFO L158 Benchmark]: Toolchain (without parser) took 303491.17ms. Allocated memory was 180.4MB in the beginning and 262.1MB in the end (delta: 81.8MB). Free memory was 145.4MB in the beginning and 154.7MB in the end (delta: -9.3MB). Peak memory consumption was 72.2MB. Max. memory is 16.1GB. [2024-11-09 04:49:42,773 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 115.3MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:49:42,774 INFO L158 Benchmark]: CACSL2BoogieTranslator took 550.99ms. Allocated memory is still 180.4MB. Free memory was 145.4MB in the beginning and 143.7MB in the end (delta: 1.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-09 04:49:42,774 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.76ms. Allocated memory is still 180.4MB. Free memory was 143.7MB in the beginning and 142.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:49:42,776 INFO L158 Benchmark]: Boogie Preprocessor took 60.88ms. Allocated memory is still 180.4MB. Free memory was 142.1MB in the beginning and 140.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:49:42,776 INFO L158 Benchmark]: RCFGBuilder took 800.86ms. Allocated memory is still 180.4MB. Free memory was 140.8MB in the beginning and 121.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-09 04:49:42,777 INFO L158 Benchmark]: TraceAbstraction took 301984.43ms. Allocated memory was 180.4MB in the beginning and 262.1MB in the end (delta: 81.8MB). Free memory was 121.2MB in the beginning and 155.7MB in the end (delta: -34.6MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2024-11-09 04:49:42,779 INFO L158 Benchmark]: Witness Printer took 8.51ms. Allocated memory is still 262.1MB. Free memory was 155.7MB in the beginning and 154.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:49:42,781 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 115.3MB. Free memory is still 84.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 550.99ms. Allocated memory is still 180.4MB. Free memory was 145.4MB in the beginning and 143.7MB in the end (delta: 1.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.76ms. Allocated memory is still 180.4MB. Free memory was 143.7MB in the beginning and 142.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.88ms. Allocated memory is still 180.4MB. Free memory was 142.1MB in the beginning and 140.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 800.86ms. Allocated memory is still 180.4MB. Free memory was 140.8MB in the beginning and 121.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 301984.43ms. Allocated memory was 180.4MB in the beginning and 262.1MB in the end (delta: 81.8MB). Free memory was 121.2MB in the beginning and 155.7MB in the end (delta: -34.6MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. * Witness Printer took 8.51ms. Allocated memory is still 262.1MB. Free memory was 155.7MB in the beginning and 154.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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: 102]: 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 91, overapproximation of someBinaryDOUBLEComparisonOperation at line 101, overapproximation of someBinaryArithmeticFLOAToperation at line 95. Possible FailurePath: [L108] COND FALSE !(__VERIFIER_nondet_int()) [L111] CALL main2() [L90] float IN = __VERIFIER_nondet_float(); [L91] CALL assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L75] COND FALSE !(!cond) [L91] RET assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L93] CALL, EXPR f(IN) VAL [\old(x)=109] [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L93] RET, EXPR f(IN) VAL [IN=109] [L93] CALL, EXPR fp(IN) VAL [\old(x)=109] [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L93] RET, EXPR fp(IN) VAL [IN=109] [L93] float x = IN - f(IN)/fp(IN); [L95] CALL, EXPR f(x) VAL [\old(x)=110] [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L95] RET, EXPR f(x) VAL [IN=109, x=110] [L95] CALL, EXPR fp(x) VAL [\old(x)=110] [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L95] RET, EXPR fp(x) VAL [IN=109, x=110] [L95] x = x - f(x)/fp(x) [L101] COND TRUE !(x < 0.1) VAL [IN=109] [L102] 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 3 procedures, 27 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 301.9s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 28.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 9.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 222 SdHoareTripleChecker+Invalid, 9.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 170 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 130 IncrementalHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 52 mSDtfsCounter, 130 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 133.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 10.4s SatisfiabilityAnalysisTime, 239.0s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 50 ConstructedInterpolants, 4 QuantifiedInterpolants, 3132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 2/11 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 [2024-11-09 04:49:43,005 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2024-11-09 04:49:43,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 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_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bef70c39331e78595b45dbc9116e80e68130a83e4d55fdf4189b866d036d57fe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:49:46,003 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:49:46,131 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-09 04:49:46,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:49:46,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:49:46,198 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:49:46,201 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:49:46,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:49:46,202 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:49:46,203 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:49:46,204 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:49:46,204 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:49:46,205 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:49:46,208 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:49:46,209 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:49:46,209 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:49:46,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:49:46,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:49:46,211 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:49:46,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:49:46,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:49:46,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:49:46,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:49:46,217 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:49:46,217 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:49:46,217 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-09 04:49:46,218 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:49:46,218 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-09 04:49:46,218 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:49:46,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:49:46,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:49:46,219 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:49:46,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 04:49:46,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:49:46,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:49:46,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:49:46,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:49:46,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:49:46,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:49:46,225 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-09 04:49:46,226 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 04:49:46,226 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:49:46,227 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:49:46,227 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bef70c39331e78595b45dbc9116e80e68130a83e4d55fdf4189b866d036d57fe [2024-11-09 04:49:46,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:49:46,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:49:46,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:49:46,795 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:49:46,796 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:49:46,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/gcd_1+newton_2_5.i Unable to find full path for "g++" [2024-11-09 04:49:49,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:49:49,683 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:49:49,683 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i [2024-11-09 04:49:49,697 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data/df7d87454/2ebb42c9f08d49e39e9034d470b482ce/FLAGe37d6ecf6 [2024-11-09 04:49:49,721 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/data/df7d87454/2ebb42c9f08d49e39e9034d470b482ce [2024-11-09 04:49:49,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:49:49,728 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:49:49,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:49:49,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:49:49,739 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:49:49,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:49:49" (1/1) ... [2024-11-09 04:49:49,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd1421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:49, skipping insertion in model container [2024-11-09 04:49:49,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:49:49" (1/1) ... [2024-11-09 04:49:49,777 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:49:50,069 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[1226,1239] [2024-11-09 04:49:50,122 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[2807,2820] [2024-11-09 04:49:50,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:49:50,151 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:49:50,175 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[1226,1239] [2024-11-09 04:49:50,202 WARN L250 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_efa9dff1-8d61-4ab3-b883-86310628fc11/sv-benchmarks/c/combinations/gcd_1+newton_2_5.i[2807,2820] [2024-11-09 04:49:50,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:49:50,273 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:49:50,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50 WrapperNode [2024-11-09 04:49:50,274 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:49:50,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:49:50,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:49:50,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:49:50,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,358 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 80 [2024-11-09 04:49:50,359 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:49:50,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:49:50,360 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:49:50,360 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:49:50,382 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,405 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:49:50,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:49:50,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:49:50,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:49:50,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (1/1) ... [2024-11-09 04:49:50,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:49:50,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:49:50,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:49:50,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:49:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:49:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-09 04:49:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2024-11-09 04:49:50,487 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2024-11-09 04:49:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-09 04:49:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-09 04:49:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:49:50,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:49:50,580 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:49:50,583 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:49:59,283 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-11-09 04:49:59,284 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:49:59,306 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:49:59,308 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:49:59,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:49:59 BoogieIcfgContainer [2024-11-09 04:49:59,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:49:59,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:49:59,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:49:59,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:49:59,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:49:49" (1/3) ... [2024-11-09 04:49:59,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438fe32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:49:59, skipping insertion in model container [2024-11-09 04:49:59,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:49:50" (2/3) ... [2024-11-09 04:49:59,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438fe32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:49:59, skipping insertion in model container [2024-11-09 04:49:59,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:49:59" (3/3) ... [2024-11-09 04:49:59,324 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_5.i [2024-11-09 04:49:59,372 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:49:59,373 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 04:49:59,457 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:49:59,466 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6b1c4112, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:49:59,467 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 04:49:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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) [2024-11-09 04:49:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 04:49:59,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:49:59,486 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:49:59,487 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:49:59,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:49:59,496 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2024-11-09 04:49:59,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:49:59,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5509505] [2024-11-09 04:49:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:59,518 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 [2024-11-09 04:49:59,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:49:59,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 04:49:59,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 04:49:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:59,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:49:59,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:49:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:49:59,816 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:49:59,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:49:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5509505] [2024-11-09 04:49:59,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5509505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:49:59,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:49:59,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:49:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395919276] [2024-11-09 04:49:59,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:49:59,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:49:59,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:49:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:49:59,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:49:59,859 INFO L87 Difference]: Start difference. First operand has 38 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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 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) [2024-11-09 04:50:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:00,008 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2024-11-09 04:50:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:50:00,013 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 [2024-11-09 04:50:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:00,024 INFO L225 Difference]: With dead ends: 71 [2024-11-09 04:50:00,024 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 04:50:00,029 INFO L431 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 [2024-11-09 04:50:00,036 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:00,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:50:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 04:50:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 04:50:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 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) [2024-11-09 04:50:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-09 04:50:00,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2024-11-09 04:50:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:00,109 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-09 04:50:00,110 INFO L472 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) [2024-11-09 04:50:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-09 04:50:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:50:00,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:00,114 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:50:00,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 04:50:00,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 04:50:00,315 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:50:00,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:00,317 INFO L85 PathProgramCache]: Analyzing trace with hash -415487823, now seen corresponding path program 1 times [2024-11-09 04:50:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:50:00,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590637694] [2024-11-09 04:50:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:00,322 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 [2024-11-09 04:50:00,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:50:00,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 04:50:00,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 [2024-11-09 04:50:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:00,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:50:00,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:00,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:01,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:50:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590637694] [2024-11-09 04:50:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590637694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [294641941] [2024-11-09 04:50:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:01,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:50:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:50:01,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:50:01,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-09 04:50:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:01,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:50:01,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:01,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [294641941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253764129] [2024-11-09 04:50:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:01,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:50:01,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:50:01,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:50:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:02,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:50:02,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:02,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:03,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253764129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:03,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:50:03,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 11 [2024-11-09 04:50:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684910945] [2024-11-09 04:50:03,234 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:50:03,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 04:50:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:50:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 04:50:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:50:03,237 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2024-11-09 04:50:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:03,816 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-09 04:50:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:50:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 13 [2024-11-09 04:50:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:03,819 INFO L225 Difference]: With dead ends: 39 [2024-11-09 04:50:03,819 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 04:50:03,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:50:03,821 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:03,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 215 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:50:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 04:50:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-09 04:50:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 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) [2024-11-09 04:50:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-09 04:50:03,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2024-11-09 04:50:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:03,831 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-09 04:50:03,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2024-11-09 04:50:03,832 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-09 04:50:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:50:03,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:03,833 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:50:03,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-09 04:50:04,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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)] Forceful destruction successful, exit code 0 [2024-11-09 04:50:04,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:50:04,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:04,435 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:50:04,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1887761044, now seen corresponding path program 2 times [2024-11-09 04:50:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:50:04,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457145415] [2024-11-09 04:50:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:50:04,437 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 [2024-11-09 04:50:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:50:04,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 04:50:04,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 (6)] Waiting until timeout for monitored process [2024-11-09 04:50:06,119 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:50:06,119 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:50:06,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 04:50:06,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:10,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:22,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:50:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457145415] [2024-11-09 04:50:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457145415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827751805] [2024-11-09 04:50:22,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:50:22,075 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:50:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:50:22,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:50:22,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-09 04:50:22,931 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:50:22,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:50:22,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 04:50:22,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:26,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827751805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:36,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005446766] [2024-11-09 04:50:36,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:50:36,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:36,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:50:36,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:50:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:50:37,951 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:50:37,952 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:50:37,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 04:50:37,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:41,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:50:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:53,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005446766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:50:53,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:50:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 5, 9, 5, 12] total 17 [2024-11-09 04:50:53,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911046029] [2024-11-09 04:50:53,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:50:53,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:50:53,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:50:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:50:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=204, Unknown=1, NotChecked=0, Total=272 [2024-11-09 04:50:53,608 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2024-11-09 04:50:56,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:50:59,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:51:01,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:51:03,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:51:05,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:51:07,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 04:51:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:14,511 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-11-09 04:51:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:51:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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 15 [2024-11-09 04:51:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:14,512 INFO L225 Difference]: With dead ends: 50 [2024-11-09 04:51:14,513 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 04:51:14,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=77, Invalid=228, Unknown=1, NotChecked=0, Total=306 [2024-11-09 04:51:14,514 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:14,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 210 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 6 Unknown, 0 Unchecked, 16.1s Time] [2024-11-09 04:51:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 04:51:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 04:51:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 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) [2024-11-09 04:51:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-11-09 04:51:14,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 15 [2024-11-09 04:51:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:14,524 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-11-09 04:51:14,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 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) [2024-11-09 04:51:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-11-09 04:51:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 04:51:14,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:14,526 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:14,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:51:14,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:14,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:15,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 04:51:15,128 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:51:15,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash 10075241, now seen corresponding path program 1 times [2024-11-09 04:51:15,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:51:15,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706883173] [2024-11-09 04:51:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:15,130 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 [2024-11-09 04:51:15,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:51:15,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 04:51:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 (9)] Waiting until timeout for monitored process [2024-11-09 04:51:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:15,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:51:15,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:51:15,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:51:16,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:51:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706883173] [2024-11-09 04:51:16,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706883173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:16,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136642204] [2024-11-09 04:51:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:51:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:51:16,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:51:16,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-09 04:51:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:17,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:51:17,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:18,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136642204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:26,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039500486] [2024-11-09 04:51:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:26,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:26,502 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:26,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:51:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:28,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:51:28,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:51:31,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039500486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:53,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:51:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 7, 5, 12] total 25 [2024-11-09 04:51:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906605630] [2024-11-09 04:51:53,238 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:53,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 04:51:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:51:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 04:51:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:51:53,241 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 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) [2024-11-09 04:51:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:54,279 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-11-09 04:51:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:51:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 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 17 [2024-11-09 04:51:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:54,292 INFO L225 Difference]: With dead ends: 35 [2024-11-09 04:51:54,292 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 04:51:54,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-11-09 04:51:54,293 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:54,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 366 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 04:51:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 04:51:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 04:51:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0) internal successors, (13), 13 states have internal predecessors, (13), 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) [2024-11-09 04:51:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-09 04:51:54,299 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2024-11-09 04:51:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:54,299 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-09 04:51:54,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 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) [2024-11-09 04:51:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-09 04:51:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:51:54,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:54,303 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:54,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 (9)] Ended with exit code 0 [2024-11-09 04:51:54,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 04:51:54,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:54,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt [2024-11-09 04:51:54,906 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:51:54,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1535073882, now seen corresponding path program 1 times [2024-11-09 04:51:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:51:54,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77203461] [2024-11-09 04:51:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:54,907 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 [2024-11-09 04:51:54,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:51:54,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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) [2024-11-09 04:51:54,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efa9dff1-8d61-4ab3-b883-86310628fc11/bin/utaipan-verify-YMUCfTKeje/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 (12)] Waiting until timeout for monitored process