./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e3b9005361fd0095f8dbb62f5fee3acdc88198cbc01de43b11979176397f6891 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:05:43,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:05:43,839 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-19 05:05:43,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:05:43,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:05:43,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:05:43,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:05:43,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:05:43,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:05:43,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:05:43,901 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:05:43,903 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:05:43,903 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:05:43,905 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:05:43,906 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:05:43,906 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:05:43,907 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:05:43,907 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:05:43,908 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:05:43,908 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:05:43,909 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:05:43,910 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:05:43,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:05:43,912 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:05:43,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:05:43,913 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:05:43,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:05:43,914 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:05:43,914 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:05:43,915 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 05:05:43,916 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:05:43,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:05:43,917 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:05:43,917 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:05:43,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:05:43,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:43,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:05:43,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:05:43,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:05:43,919 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:05:43,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:05:43,920 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:05:43,920 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:05:43,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:05:43,921 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_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3b9005361fd0095f8dbb62f5fee3acdc88198cbc01de43b11979176397f6891 [2023-11-19 05:05:44,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:05:44,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:05:44,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:05:44,306 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:05:44,307 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:05:44,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i [2023-11-19 05:05:47,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:05:48,218 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:05:48,219 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i [2023-11-19 05:05:48,277 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/data/9760bf506/65b775eb21a3446f9b9523eda6a202d2/FLAG8b52ea9bc [2023-11-19 05:05:48,690 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/data/9760bf506/65b775eb21a3446f9b9523eda6a202d2 [2023-11-19 05:05:48,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:05:48,700 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:05:48,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:48,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:05:48,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:05:48,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:48" (1/1) ... [2023-11-19 05:05:48,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dea2244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:48, skipping insertion in model container [2023-11-19 05:05:48,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:48" (1/1) ... [2023-11-19 05:05:48,885 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:05:50,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:50,623 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:05:50,915 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [7332] [2023-11-19 05:05:50,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:51,047 WARN L675 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:05:51,056 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:05:51,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51 WrapperNode [2023-11-19 05:05:51,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:51,058 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:51,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:05:51,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:05:51,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,258 INFO L138 Inliner]: procedures = 188, calls = 607, calls flagged for inlining = 75, calls inlined = 50, statements flattened = 1272 [2023-11-19 05:05:51,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:51,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:05:51,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:05:51,259 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:05:51,269 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,359 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,430 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,447 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,456 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:05:51,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:05:51,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:05:51,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:05:51,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (1/1) ... [2023-11-19 05:05:51,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:51,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:51,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:05:51,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:05:51,550 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-19 05:05:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-19 05:05:51,550 INFO L130 BoogieDeclarations]: Found specification of procedure uspace_ring_map [2023-11-19 05:05:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure uspace_ring_map [2023-11-19 05:05:51,550 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_unmap_user_pages [2023-11-19 05:05:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_unmap_user_pages [2023-11-19 05:05:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:05:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure hash_64 [2023-11-19 05:05:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_64 [2023-11-19 05:05:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_release_buffers [2023-11-19 05:05:51,552 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_release_buffers [2023-11-19 05:05:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:05:51,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:05:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2023-11-19 05:05:51,552 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2023-11-19 05:05:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_write [2023-11-19 05:05:51,553 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_write [2023-11-19 05:05:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:05:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:05:51,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:05:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:05:51,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:05:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_open [2023-11-19 05:05:51,554 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_open [2023-11-19 05:05:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_destroy [2023-11-19 05:05:51,554 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_destroy [2023-11-19 05:05:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:05:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tgt_cmd_to_host [2023-11-19 05:05:51,555 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tgt_cmd_to_host [2023-11-19 05:05:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 05:05:51,555 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 05:05:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:05:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_ring_idx_inc [2023-11-19 05:05:51,556 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_ring_idx_inc [2023-11-19 05:05:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:05:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:05:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_head_event [2023-11-19 05:05:51,557 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_head_event [2023-11-19 05:05:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_host_put [2023-11-19 05:05:51,557 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_host_put [2023-11-19 05:05:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2023-11-19 05:05:51,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2023-11-19 05:05:51,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:05:51,558 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 05:05:51,558 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 05:05:51,558 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-19 05:05:51,558 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-19 05:05:51,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:05:51,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:05:51,559 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_ring_exit [2023-11-19 05:05:51,559 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_ring_exit [2023-11-19 05:05:51,559 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:05:51,559 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:05:51,559 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tgt_cmd_destroy [2023-11-19 05:05:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tgt_cmd_destroy [2023-11-19 05:05:51,560 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_ring_init [2023-11-19 05:05:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_ring_init [2023-11-19 05:05:51,560 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-19 05:05:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-19 05:05:51,560 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_free [2023-11-19 05:05:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_free [2023-11-19 05:05:51,561 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_poll [2023-11-19 05:05:51,561 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_poll [2023-11-19 05:05:51,561 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-19 05:05:51,561 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-19 05:05:51,561 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_host_lookup [2023-11-19 05:05:51,561 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_host_lookup [2023-11-19 05:05:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_mmap [2023-11-19 05:05:51,562 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_mmap [2023-11-19 05:05:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:05:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-19 05:05:51,562 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-19 05:05:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:05:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:05:51,937 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:05:51,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:05:53,274 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:05:53,620 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:05:53,621 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:05:53,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:53 BoogieIcfgContainer [2023-11-19 05:05:53,630 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:05:53,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:05:53,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:05:53,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:05:53,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:05:48" (1/3) ... [2023-11-19 05:05:53,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39de9fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:53, skipping insertion in model container [2023-11-19 05:05:53,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:51" (2/3) ... [2023-11-19 05:05:53,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39de9fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:53, skipping insertion in model container [2023-11-19 05:05:53,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:53" (3/3) ... [2023-11-19 05:05:53,640 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i [2023-11-19 05:05:53,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:05:53,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 05:05:53,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:05:53,733 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;@2077fbc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:05:53,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-19 05:05:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 328 states, 203 states have (on average 1.3793103448275863) internal successors, (280), 220 states have internal predecessors, (280), 83 states have call successors, (83), 31 states have call predecessors, (83), 31 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-19 05:05:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:05:53,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:53,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:53,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, tgt_ring_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, uspace_ring_mapErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-19 05:05:53,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1519104012, now seen corresponding path program 1 times [2023-11-19 05:05:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12685928] [2023-11-19 05:05:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:54,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:54,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12685928] [2023-11-19 05:05:54,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12685928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:54,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:54,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813310290] [2023-11-19 05:05:54,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:54,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:54,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:54,352 INFO L87 Difference]: Start difference. First operand has 328 states, 203 states have (on average 1.3793103448275863) internal successors, (280), 220 states have internal predecessors, (280), 83 states have call successors, (83), 31 states have call predecessors, (83), 31 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:54,751 INFO L93 Difference]: Finished difference Result 733 states and 997 transitions. [2023-11-19 05:05:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:54,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 05:05:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:54,778 INFO L225 Difference]: With dead ends: 733 [2023-11-19 05:05:54,779 INFO L226 Difference]: Without dead ends: 382 [2023-11-19 05:05:54,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:54,794 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 100 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:54,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 734 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:05:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-19 05:05:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 378. [2023-11-19 05:05:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 238 states have (on average 1.3865546218487395) internal successors, (330), 254 states have internal predecessors, (330), 92 states have call successors, (92), 38 states have call predecessors, (92), 38 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-19 05:05:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 512 transitions. [2023-11-19 05:05:54,945 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 512 transitions. Word has length 12 [2023-11-19 05:05:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:54,946 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 512 transitions. [2023-11-19 05:05:54,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 512 transitions. [2023-11-19 05:05:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:05:54,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:54,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:54,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:05:54,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, tgt_ring_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, uspace_ring_mapErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-19 05:05:54,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 973496684, now seen corresponding path program 1 times [2023-11-19 05:05:54,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:54,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254576182] [2023-11-19 05:05:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:55,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254576182] [2023-11-19 05:05:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254576182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:55,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:05:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493995648] [2023-11-19 05:05:55,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:55,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:55,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:55,188 INFO L87 Difference]: Start difference. First operand 378 states and 512 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:05:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:56,047 INFO L93 Difference]: Finished difference Result 786 states and 1058 transitions. [2023-11-19 05:05:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:56,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-19 05:05:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:56,053 INFO L225 Difference]: With dead ends: 786 [2023-11-19 05:05:56,054 INFO L226 Difference]: Without dead ends: 409 [2023-11-19 05:05:56,055 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 [2023-11-19 05:05:56,058 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 75 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:56,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 679 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:05:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-19 05:05:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 396. [2023-11-19 05:05:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 254 states have (on average 1.389763779527559) internal successors, (353), 269 states have internal predecessors, (353), 89 states have call successors, (89), 43 states have call predecessors, (89), 43 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-19 05:05:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 530 transitions. [2023-11-19 05:05:56,102 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 530 transitions. Word has length 15 [2023-11-19 05:05:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:56,102 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 530 transitions. [2023-11-19 05:05:56,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:05:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 530 transitions. [2023-11-19 05:05:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:05:56,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:56,106 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:05:56,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:05:56,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting tgt_ring_initErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, tgt_ring_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, uspace_ring_mapErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-19 05:05:56,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 865701599, now seen corresponding path program 1 times [2023-11-19 05:05:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154052900] [2023-11-19 05:05:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:56,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:05:56,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154052900] [2023-11-19 05:05:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154052900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:56,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:56,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:56,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2761793] [2023-11-19 05:05:56,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:56,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:56,353 INFO L87 Difference]: Start difference. First operand 396 states and 530 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:05:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:56,528 INFO L93 Difference]: Finished difference Result 798 states and 1078 transitions. [2023-11-19 05:05:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-19 05:05:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:56,532 INFO L225 Difference]: With dead ends: 798 [2023-11-19 05:05:56,532 INFO L226 Difference]: Without dead ends: 412 [2023-11-19 05:05:56,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:56,535 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 4 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:56,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 727 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:05:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-11-19 05:05:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 404. [2023-11-19 05:05:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 262 states have (on average 1.3854961832061068) internal successors, (363), 277 states have internal predecessors, (363), 89 states have call successors, (89), 43 states have call predecessors, (89), 43 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-19 05:05:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 540 transitions. [2023-11-19 05:05:56,567 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 540 transitions. Word has length 31 [2023-11-19 05:05:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:56,568 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 540 transitions. [2023-11-19 05:05:56,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:05:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 540 transitions. [2023-11-19 05:05:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 05:05:56,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:56,570 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] [2023-11-19 05:05:56,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:05:56,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, tgt_ring_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, uspace_ring_mapErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-19 05:05:56,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2085543305, now seen corresponding path program 1 times [2023-11-19 05:05:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:56,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977184638] [2023-11-19 05:05:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:56,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:56,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977184638] [2023-11-19 05:05:56,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977184638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:56,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:56,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:05:56,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466270534] [2023-11-19 05:05:56,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:05:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:05:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:05:56,771 INFO L87 Difference]: Start difference. First operand 404 states and 540 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-11-19 05:05:58,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:58,549 INFO L93 Difference]: Finished difference Result 802 states and 1070 transitions. [2023-11-19 05:05:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:05:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) Word has length 29 [2023-11-19 05:05:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:58,552 INFO L225 Difference]: With dead ends: 802 [2023-11-19 05:05:58,552 INFO L226 Difference]: Without dead ends: 404 [2023-11-19 05:05:58,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:05:58,555 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:58,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1093 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-19 05:05:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-19 05:05:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2023-11-19 05:05:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 262 states have (on average 1.3778625954198473) internal successors, (361), 277 states have internal predecessors, (361), 89 states have call successors, (89), 43 states have call predecessors, (89), 43 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-19 05:05:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 538 transitions. [2023-11-19 05:05:58,578 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 538 transitions. Word has length 29 [2023-11-19 05:05:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:58,578 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 538 transitions. [2023-11-19 05:05:58,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-11-19 05:05:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 538 transitions. [2023-11-19 05:05:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 05:05:58,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:58,582 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:05:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:05:58,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting tgt_ring_initErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, tgt_ring_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, uspace_ring_mapErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-19 05:05:58,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1657137436, now seen corresponding path program 1 times [2023-11-19 05:05:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404359871] [2023-11-19 05:05:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:05:58,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:58,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404359871] [2023-11-19 05:05:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404359871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:05:58,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305886502] [2023-11-19 05:05:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:58,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:05:58,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:58,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:05:58,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:05:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:59,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:05:59,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:05:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:05:59,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:05:59,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305886502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:59,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:05:59,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-19 05:05:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983250096] [2023-11-19 05:05:59,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:59,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:05:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:05:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:05:59,266 INFO L87 Difference]: Start difference. First operand 404 states and 538 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:05:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:59,508 INFO L93 Difference]: Finished difference Result 412 states and 550 transitions. [2023-11-19 05:05:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:05:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-11-19 05:05:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:59,513 INFO L225 Difference]: With dead ends: 412 [2023-11-19 05:05:59,513 INFO L226 Difference]: Without dead ends: 411 [2023-11-19 05:05:59,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:05:59,515 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 9 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:59,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1083 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:05:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-19 05:05:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2023-11-19 05:05:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 262 states have (on average 1.3702290076335877) internal successors, (359), 276 states have internal predecessors, (359), 89 states have call successors, (89), 43 states have call predecessors, (89), 43 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-19 05:05:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 536 transitions. [2023-11-19 05:05:59,542 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 536 transitions. Word has length 35 [2023-11-19 05:05:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 536 transitions. [2023-11-19 05:05:59,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:05:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 536 transitions. [2023-11-19 05:05:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 05:05:59,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:59,545 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] [2023-11-19 05:05:59,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:05:59,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:05:59,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting tgt_ring_initErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [tgt_ring_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, tgt_ring_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, uspace_ring_mapErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-11-19 05:05:59,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash 168347461, now seen corresponding path program 1 times [2023-11-19 05:05:59,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:59,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512073549] [2023-11-19 05:05:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:06:00,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512073549] [2023-11-19 05:06:00,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512073549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:00,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589928569] [2023-11-19 05:06:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:00,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:00,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:00,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:00,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79b76524-a10d-4103-8b17-0753fe121231/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:06:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:00,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:06:00,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:06:00,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:06:00,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589928569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:00,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279751360] [2023-11-19 05:06:00,461 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-11-19 05:06:00,461 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:06:00,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:06:00,472 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:06:00,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:06:42,148 INFO L197 IcfgInterpreter]: Interpreting procedure tgt_ring_init with input of size 114 for LOIs