./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91 --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 64bit --witnessprinter.graph.data.programhash c247f7785da4bad35b227af25ef3ffc26bc077e1b05f1520f2d707a8c759410c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:08:33,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:08:33,996 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:08:34,006 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:08:34,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:08:34,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:08:34,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:08:34,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:08:34,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:08:34,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:08:34,063 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:08:34,064 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:08:34,064 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:08:34,065 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:08:34,065 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:08:34,066 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:08:34,067 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:08:34,067 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:08:34,068 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:08:34,069 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:08:34,069 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:08:34,070 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:08:34,071 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:08:34,071 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:08:34,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:08:34,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:08:34,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:08:34,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:08:34,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:08:34,074 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:08:34,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:08:34,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:08:34,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:08:34,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:08:34,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:34,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:08:34,078 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:08:34,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:08:34,079 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:08:34,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:08:34,080 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:08:34,080 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:08:34,081 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:08:34,081 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:08:34,081 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_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c247f7785da4bad35b227af25ef3ffc26bc077e1b05f1520f2d707a8c759410c [2023-11-25 00:08:34,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:08:34,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:08:34,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:08:34,482 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:08:34,483 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:08:34,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i [2023-11-25 00:08:37,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:08:38,567 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:08:38,568 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i [2023-11-25 00:08:38,628 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/data/cd09c86a5/6ae49db274e5437598d75d33729a6f68/FLAG52358a8ec [2023-11-25 00:08:38,653 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/data/cd09c86a5/6ae49db274e5437598d75d33729a6f68 [2023-11-25 00:08:38,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:08:38,666 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:08:38,669 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:38,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:08:38,676 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:08:38,677 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:38" (1/1) ... [2023-11-25 00:08:38,678 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bf752c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:38, skipping insertion in model container [2023-11-25 00:08:38,679 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:38" (1/1) ... [2023-11-25 00:08:38,833 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:08:41,326 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298288,298301] [2023-11-25 00:08:41,332 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298435,298448] [2023-11-25 00:08:41,333 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298574,298587] [2023-11-25 00:08:41,333 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298732,298745] [2023-11-25 00:08:41,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:41,429 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:08:41,616 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5396] [2023-11-25 00:08:41,618 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5403] [2023-11-25 00:08:41,619 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("":); [5410] [2023-11-25 00:08:41,894 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298288,298301] [2023-11-25 00:08:41,894 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298435,298448] [2023-11-25 00:08:41,895 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298574,298587] [2023-11-25 00:08:41,896 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i[298732,298745] [2023-11-25 00:08:41,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:42,159 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:08:42,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42 WrapperNode [2023-11-25 00:08:42,160 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:42,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:42,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:08:42,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:08:42,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:42,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:42,662 INFO L138 Inliner]: procedures = 311, calls = 3195, calls flagged for inlining = 173, calls inlined = 160, statements flattened = 6002 [2023-11-25 00:08:42,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:42,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:08:42,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:08:42,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:08:42,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:42,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:42,714 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:42,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:43,026 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:43,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:43,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:43,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:43,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:08:43,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:08:43,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:08:43,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:08:43,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (1/1) ... [2023-11-25 00:08:43,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:43,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:43,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:08:43,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cc990e9-d92c-4d4b-a734-7432c49da546/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:08:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure read_bulk_callback [2023-11-25 00:08:43,282 INFO L138 BoogieDeclarations]: Found implementation of procedure read_bulk_callback [2023-11-25 00:08:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-25 00:08:43,282 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-25 00:08:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-25 00:08:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-25 00:08:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-25 00:08:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-25 00:08:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-25 00:08:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-25 00:08:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-25 00:08:43,284 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-25 00:08:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure write_mii_word [2023-11-25 00:08:43,284 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mii_word [2023-11-25 00:08:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2023-11-25 00:08:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2023-11-25 00:08:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-25 00:08:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-25 00:08:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2023-11-25 00:08:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2023-11-25 00:08:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure set_carrier [2023-11-25 00:08:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure set_carrier [2023-11-25 00:08:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-25 00:08:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-25 00:08:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2023-11-25 00:08:43,287 INFO L138 BoogieDeclarations]: Found implementation of procedure strsep [2023-11-25 00:08:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure read_mii_word [2023-11-25 00:08:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mii_word [2023-11-25 00:08:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-25 00:08:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-25 00:08:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2023-11-25 00:08:43,289 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2023-11-25 00:08:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_open [2023-11-25 00:08:43,289 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_open [2023-11-25 00:08:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-11-25 00:08:43,290 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-11-25 00:08:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_netdev_dbg [2023-11-25 00:08:43,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_netdev_dbg [2023-11-25 00:08:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2023-11-25 00:08:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2023-11-25 00:08:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:08:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure read_eprom_word [2023-11-25 00:08:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure read_eprom_word [2023-11-25 00:08:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2023-11-25 00:08:43,292 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2023-11-25 00:08:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:08:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_nway_reset [2023-11-25 00:08:43,292 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_nway_reset [2023-11-25 00:08:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2023-11-25 00:08:43,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2023-11-25 00:08:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-11-25 00:08:43,293 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-11-25 00:08:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-11-25 00:08:43,294 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-11-25 00:08:43,294 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-25 00:08:43,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-25 00:08:43,294 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_resume [2023-11-25 00:08:43,294 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_resume [2023-11-25 00:08:43,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:08:43,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:08:43,295 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-25 00:08:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-25 00:08:43,296 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-25 00:08:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-25 00:08:43,296 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-11-25 00:08:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-11-25 00:08:43,296 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2023-11-25 00:08:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2023-11-25 00:08:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_tx_timeout [2023-11-25 00:08:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_tx_timeout [2023-11-25 00:08:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-25 00:08:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-25 00:08:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_dec_workqueue [2023-11-25 00:08:43,298 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_dec_workqueue [2023-11-25 00:08:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-25 00:08:43,298 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-25 00:08:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-25 00:08:43,299 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-25 00:08:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure free_all_urbs [2023-11-25 00:08:43,299 INFO L138 BoogieDeclarations]: Found implementation of procedure free_all_urbs [2023-11-25 00:08:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-11-25 00:08:43,300 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-11-25 00:08:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2023-11-25 00:08:43,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2023-11-25 00:08:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_disconnect [2023-11-25 00:08:43,300 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_disconnect [2023-11-25 00:08:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-25 00:08:43,301 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-25 00:08:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-25 00:08:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2023-11-25 00:08:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2023-11-25 00:08:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-25 00:08:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure __mii_op [2023-11-25 00:08:43,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __mii_op [2023-11-25 00:08:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2023-11-25 00:08:43,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2023-11-25 00:08:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-25 00:08:43,303 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-25 00:08:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:08:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2023-11-25 00:08:43,304 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2023-11-25 00:08:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2023-11-25 00:08:43,304 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2023-11-25 00:08:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure intr_callback [2023-11-25 00:08:43,305 INFO L138 BoogieDeclarations]: Found implementation of procedure intr_callback [2023-11-25 00:08:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-25 00:08:43,305 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-25 00:08:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_set_wol [2023-11-25 00:08:43,305 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_set_wol [2023-11-25 00:08:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb_ip_align [2023-11-25 00:08:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb_ip_align [2023-11-25 00:08:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-25 00:08:43,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-25 00:08:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2023-11-25 00:08:43,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2023-11-25 00:08:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-25 00:08:43,307 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-25 00:08:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-25 00:08:43,307 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-25 00:08:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_pegasus_exit_11_2 [2023-11-25 00:08:43,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_pegasus_exit_11_2 [2023-11-25 00:08:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-25 00:08:43,308 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-25 00:08:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:08:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-25 00:08:43,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-25 00:08:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-25 00:08:43,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-25 00:08:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_set_multicast [2023-11-25 00:08:43,310 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_set_multicast [2023-11-25 00:08:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure set_register [2023-11-25 00:08:43,310 INFO L138 BoogieDeclarations]: Found implementation of procedure set_register [2023-11-25 00:08:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:08:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-11-25 00:08:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-11-25 00:08:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2023-11-25 00:08:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2023-11-25 00:08:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2023-11-25 00:08:43,312 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2023-11-25 00:08:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:08:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-25 00:08:43,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-25 00:08:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:08:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2023-11-25 00:08:43,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2023-11-25 00:08:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2023-11-25 00:08:43,314 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2023-11-25 00:08:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-25 00:08:43,314 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-25 00:08:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-25 00:08:43,314 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-25 00:08:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2023-11-25 00:08:43,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2023-11-25 00:08:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_close [2023-11-25 00:08:43,315 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_close [2023-11-25 00:08:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2023-11-25 00:08:43,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2023-11-25 00:08:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure get_registers [2023-11-25 00:08:43,316 INFO L138 BoogieDeclarations]: Found implementation of procedure get_registers [2023-11-25 00:08:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2023-11-25 00:08:43,316 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2023-11-25 00:08:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2023-11-25 00:08:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2023-11-25 00:08:43,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2023-11-25 00:08:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:08:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure set_registers [2023-11-25 00:08:43,318 INFO L138 BoogieDeclarations]: Found implementation of procedure set_registers [2023-11-25 00:08:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2023-11-25 00:08:43,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2023-11-25 00:08:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:08:43,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:08:44,153 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:08:44,166 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:08:45,208 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-25 00:08:53,248 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2023-11-25 00:08:53,910 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:08:56,716 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:08:56,716 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-25 00:08:56,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:56 BoogieIcfgContainer [2023-11-25 00:08:56,720 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:08:56,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:08:56,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:08:56,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:08:56,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:08:38" (1/3) ... [2023-11-25 00:08:56,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c6004e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:56, skipping insertion in model container [2023-11-25 00:08:56,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:42" (2/3) ... [2023-11-25 00:08:56,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c6004e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:56, skipping insertion in model container [2023-11-25 00:08:56,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:56" (3/3) ... [2023-11-25 00:08:56,738 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-usb-dev_drivers-net-usb-pegasus.cil.i [2023-11-25 00:08:56,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:08:56,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-25 00:08:56,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:08:56,899 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7129eba9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:08:56,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-25 00:08:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 1129 states, 714 states have (on average 1.334733893557423) internal successors, (953), 723 states have internal predecessors, (953), 337 states have call successors, (337), 77 states have call predecessors, (337), 76 states have return successors, (331), 329 states have call predecessors, (331), 331 states have call successors, (331) [2023-11-25 00:08:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-25 00:08:56,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:56,963 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:56,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:56,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1597957347, now seen corresponding path program 1 times [2023-11-25 00:08:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:56,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667440454] [2023-11-25 00:08:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:56,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2023-11-25 00:08:58,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:58,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667440454] [2023-11-25 00:08:58,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667440454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:58,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:58,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:08:58,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966092841] [2023-11-25 00:08:58,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:58,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:58,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:08:58,935 INFO L87 Difference]: Start difference. First operand has 1129 states, 714 states have (on average 1.334733893557423) internal successors, (953), 723 states have internal predecessors, (953), 337 states have call successors, (337), 77 states have call predecessors, (337), 76 states have return successors, (331), 329 states have call predecessors, (331), 331 states have call successors, (331) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:09:04,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:06,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:08,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:08,842 INFO L93 Difference]: Finished difference Result 3245 states and 4667 transitions. [2023-11-25 00:09:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:09:08,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 140 [2023-11-25 00:09:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:08,907 INFO L225 Difference]: With dead ends: 3245 [2023-11-25 00:09:08,907 INFO L226 Difference]: Without dead ends: 2131 [2023-11-25 00:09:08,925 INFO L412 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 [2023-11-25 00:09:08,930 INFO L413 NwaCegarLoop]: 1374 mSDtfsCounter, 1521 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:08,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 2663 Invalid, 524 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 514 Invalid, 3 Unknown, 0 Unchecked, 9.5s Time] [2023-11-25 00:09:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2023-11-25 00:09:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2129. [2023-11-25 00:09:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 1359 states have (on average 1.3311258278145695) internal successors, (1809), 1376 states have internal predecessors, (1809), 621 states have call successors, (621), 148 states have call predecessors, (621), 147 states have return successors, (618), 614 states have call predecessors, (618), 618 states have call successors, (618) [2023-11-25 00:09:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 3048 transitions. [2023-11-25 00:09:09,267 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 3048 transitions. Word has length 140 [2023-11-25 00:09:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:09,273 INFO L495 AbstractCegarLoop]: Abstraction has 2129 states and 3048 transitions. [2023-11-25 00:09:09,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:09:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 3048 transitions. [2023-11-25 00:09:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-25 00:09:09,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:09,298 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:09,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:09:09,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:09,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1670040503, now seen corresponding path program 1 times [2023-11-25 00:09:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:09,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657282575] [2023-11-25 00:09:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:09,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2023-11-25 00:09:10,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657282575] [2023-11-25 00:09:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657282575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:10,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:10,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:09:10,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960531073] [2023-11-25 00:09:10,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:10,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:09:10,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:09:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:09:10,300 INFO L87 Difference]: Start difference. First operand 2129 states and 3048 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-25 00:09:15,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:17,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:09:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:17,668 INFO L93 Difference]: Finished difference Result 5147 states and 7343 transitions. [2023-11-25 00:09:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:09:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 201 [2023-11-25 00:09:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:17,695 INFO L225 Difference]: With dead ends: 5147 [2023-11-25 00:09:17,695 INFO L226 Difference]: Without dead ends: 3043 [2023-11-25 00:09:17,705 INFO L412 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 [2023-11-25 00:09:17,706 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 669 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:17,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 2682 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 539 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-11-25 00:09:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2023-11-25 00:09:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 3032. [2023-11-25 00:09:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 1961 states have (on average 1.3396226415094339) internal successors, (2627), 1991 states have internal predecessors, (2627), 838 states have call successors, (838), 232 states have call predecessors, (838), 231 states have return successors, (835), 822 states have call predecessors, (835), 835 states have call successors, (835) [2023-11-25 00:09:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4300 transitions. [2023-11-25 00:09:17,891 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4300 transitions. Word has length 201 [2023-11-25 00:09:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:17,893 INFO L495 AbstractCegarLoop]: Abstraction has 3032 states and 4300 transitions. [2023-11-25 00:09:17,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-25 00:09:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4300 transitions. [2023-11-25 00:09:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-25 00:09:17,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:17,902 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:17,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:09:17,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:17,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:17,903 INFO L85 PathProgramCache]: Analyzing trace with hash -585123425, now seen corresponding path program 1 times [2023-11-25 00:09:17,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:17,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359393822] [2023-11-25 00:09:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:17,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2023-11-25 00:09:19,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359393822] [2023-11-25 00:09:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359393822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:09:19,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:09:19,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:09:19,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166852092] [2023-11-25 00:09:19,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:09:19,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:09:19,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:09:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:09:19,320 INFO L87 Difference]: Start difference. First operand 3032 states and 4300 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22)