./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--mISDN--mISDN_dsp.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--mISDN--mISDN_dsp.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire --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 cb5bfc1a8464cddde83cddd5aff6365e1e8e8f5fea381390d6f1d2e53f223890 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:19:39,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:19:39,294 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:19:39,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:19:39,302 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:19:39,347 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:19:39,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:19:39,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:19:39,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:19:39,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:19:39,359 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:19:39,361 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:19:39,361 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:19:39,363 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:19:39,364 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:19:39,364 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:19:39,364 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:19:39,365 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:19:39,365 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:19:39,366 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:19:39,366 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:19:39,367 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:19:39,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:19:39,368 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:19:39,369 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:19:39,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:19:39,369 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:19:39,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:19:39,370 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:19:39,371 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:19:39,372 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:19:39,372 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:19:39,372 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:19:39,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:19:39,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:39,373 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:19:39,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:19:39,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:19:39,374 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:19:39,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:19:39,374 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:19:39,375 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:19:39,375 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:19:39,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:19:39,376 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_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb5bfc1a8464cddde83cddd5aff6365e1e8e8f5fea381390d6f1d2e53f223890 [2023-11-23 21:19:39,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:19:39,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:19:39,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:19:39,673 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:19:39,674 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:19:39,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--mISDN--mISDN_dsp.ko-entry_point.cil.out.i [2023-11-23 21:19:42,842 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:43,544 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:43,544 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--mISDN--mISDN_dsp.ko-entry_point.cil.out.i [2023-11-23 21:19:43,613 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/data/daa7afc16/f4aa0a6decf24959b8da6018f8932249/FLAG461b9b22d [2023-11-23 21:19:43,634 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/data/daa7afc16/f4aa0a6decf24959b8da6018f8932249 [2023-11-23 21:19:43,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:43,642 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:43,643 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:43,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:43,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:43,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:43" (1/1) ... [2023-11-23 21:19:43,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30979714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:43, skipping insertion in model container [2023-11-23 21:19:43,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:43" (1/1) ... [2023-11-23 21:19:43,853 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:44,501 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [5701] [2023-11-23 21:19:44,501 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [5702-5703] [2023-11-23 21:19:45,003 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_3cf3e455-310e-404d-b39c-55c467f68e21/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--mISDN--mISDN_dsp.ko-entry_point.cil.out.i[171010,171023] [2023-11-23 21:19:47,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:47,451 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:47,624 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [5701] [2023-11-23 21:19:47,624 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [5702-5703] [2023-11-23 21:19:47,641 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_3cf3e455-310e-404d-b39c-55c467f68e21/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--mISDN--mISDN_dsp.ko-entry_point.cil.out.i[171010,171023] [2023-11-23 21:19:48,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:48,339 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:19:48,348 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:48,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48 WrapperNode [2023-11-23 21:19:48,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:48,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:48,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:48,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:48,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:48,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:48,921 INFO L138 Inliner]: procedures = 293, calls = 6236, calls flagged for inlining = 93, calls inlined = 48, statements flattened = 4633 [2023-11-23 21:19:48,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:48,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:48,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:48,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:48,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:48,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:48,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:48,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:49,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:49,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:49,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:49,150 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:49,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:49,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:49,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:49,174 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:49,175 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (1/1) ... [2023-11-23 21:19:49,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:49,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:49,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:49,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cf3e455-310e-404d-b39c-55c467f68e21/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:19:49,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:19:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 21:19:49,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 21:19:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:19:49,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:19:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure linear2alaw [2023-11-23 21:19:49,255 INFO L138 BoogieDeclarations]: Found implementation of procedure linear2alaw [2023-11-23 21:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:19:49,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:19:49,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:19:49,257 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:19:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-23 21:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 21:19:49,263 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 21:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-11-23 21:19:49,264 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-11-23 21:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure linear2ulaw [2023-11-23 21:19:49,265 INFO L138 BoogieDeclarations]: Found implementation of procedure linear2ulaw [2023-11-23 21:19:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:19:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:19:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-23 21:19:49,268 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-23 21:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:19:49,268 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:19:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 21:19:49,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 21:19:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2023-11-23 21:19:49,270 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2023-11-23 21:19:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_dsp_element_unregister [2023-11-23 21:19:49,270 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_dsp_element_unregister [2023-11-23 21:19:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:19:49,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 21:19:49,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 21:19:49,271 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:19:49,271 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:19:49,271 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-23 21:19:49,271 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-23 21:19:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:19:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:19:49,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:19:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:19:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_4 [2023-11-23 21:19:49,272 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_4 [2023-11-23 21:19:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:19:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:19:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_4 [2023-11-23 21:19:49,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_4 [2023-11-23 21:19:49,274 INFO L130 BoogieDeclarations]: Found specification of procedure device_unregister [2023-11-23 21:19:49,274 INFO L138 BoogieDeclarations]: Found implementation of procedure device_unregister [2023-11-23 21:19:49,275 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-11-23 21:19:49,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-11-23 21:19:49,276 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_bits [2023-11-23 21:19:49,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_bits [2023-11-23 21:19:49,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:19:49,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:49,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:49,277 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:19:49,277 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:19:49,709 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:49,712 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:50,059 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:20:06,494 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:20:08,189 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:20:08,189 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:20:08,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:08 BoogieIcfgContainer [2023-11-23 21:20:08,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:20:08,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:20:08,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:20:08,199 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:20:08,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:43" (1/3) ... [2023-11-23 21:20:08,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15be6547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:08, skipping insertion in model container [2023-11-23 21:20:08,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:48" (2/3) ... [2023-11-23 21:20:08,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15be6547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:08, skipping insertion in model container [2023-11-23 21:20:08,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:08" (3/3) ... [2023-11-23 21:20:08,204 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--mISDN--mISDN_dsp.ko-entry_point.cil.out.i [2023-11-23 21:20:08,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:20:08,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:20:08,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:20:08,292 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;@1934f0eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:20:08,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:20:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 180 states have (on average 1.4055555555555554) internal successors, (253), 187 states have internal predecessors, (253), 68 states have call successors, (68), 27 states have call predecessors, (68), 26 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-23 21:20:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:20:08,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:08,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:08,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:08,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1322407419, now seen corresponding path program 1 times [2023-11-23 21:20:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:08,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762499673] [2023-11-23 21:20:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:08,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:10,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762499673] [2023-11-23 21:20:10,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762499673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:10,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:10,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:20:10,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866618478] [2023-11-23 21:20:10,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:10,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:10,187 INFO L87 Difference]: Start difference. First operand has 276 states, 180 states have (on average 1.4055555555555554) internal successors, (253), 187 states have internal predecessors, (253), 68 states have call successors, (68), 27 states have call predecessors, (68), 26 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:12,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:20:15,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:20:17,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:20:19,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:20:22,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:20:24,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:20:27,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:20:29,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:20:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:30,348 INFO L93 Difference]: Finished difference Result 767 states and 1074 transitions. [2023-11-23 21:20:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:20:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:30,372 INFO L225 Difference]: With dead ends: 767 [2023-11-23 21:20:30,372 INFO L226 Difference]: Without dead ends: 413 [2023-11-23 21:20:30,379 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 [2023-11-23 21:20:30,383 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 307 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:30,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 629 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 8 Unknown, 0 Unchecked, 20.0s Time] [2023-11-23 21:20:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-23 21:20:30,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 398. [2023-11-23 21:20:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 268 states have (on average 1.4179104477611941) internal successors, (380), 276 states have internal predecessors, (380), 90 states have call successors, (90), 40 states have call predecessors, (90), 39 states have return successors, (88), 81 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-23 21:20:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 558 transitions. [2023-11-23 21:20:30,489 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 558 transitions. Word has length 17 [2023-11-23 21:20:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:30,489 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 558 transitions. [2023-11-23 21:20:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 558 transitions. [2023-11-23 21:20:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:20:30,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:30,494 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:20:30,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:20:30,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:30,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:30,496 INFO L85 PathProgramCache]: Analyzing trace with hash 883668892, now seen corresponding path program 1 times [2023-11-23 21:20:30,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:30,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760981943] [2023-11-23 21:20:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:30,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:20:32,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760981943] [2023-11-23 21:20:32,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760981943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:32,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:32,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:20:32,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828303867] [2023-11-23 21:20:32,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:32,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:20:32,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:20:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:20:32,467 INFO L87 Difference]: Start difference. First operand 398 states and 558 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:20:34,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []