./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/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_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91 --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 0.2.4-dev-0e0057c [2023-11-24 23:55:22,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:55:22,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-24 23:55:22,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:55:22,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:55:22,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:55:22,279 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:55:22,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:55:22,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:55:22,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:55:22,286 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:55:22,287 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:55:22,287 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:55:22,289 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:55:22,289 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:55:22,290 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:55:22,290 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:55:22,291 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:55:22,291 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:55:22,292 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:55:22,292 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:55:22,293 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:55:22,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:55:22,295 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:55:22,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:55:22,296 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:55:22,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:55:22,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:55:22,297 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:55:22,297 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:55:22,299 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:55:22,299 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:55:22,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:55:22,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:55:22,300 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:55:22,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:55:22,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:22,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:55:22,301 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:55:22,301 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:55:22,302 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:55:22,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:55:22,302 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:55:22,302 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:55:22,303 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:55:22,303 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:55:22,304 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_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3b9005361fd0095f8dbb62f5fee3acdc88198cbc01de43b11979176397f6891 [2023-11-24 23:55:22,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:55:22,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:55:22,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:55:22,682 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:55:22,684 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:55:22,685 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i [2023-11-24 23:55:25,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:55:26,552 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:55:26,556 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i [2023-11-24 23:55:26,624 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/data/804758e1a/1b7df5e41e8346b9814009fb20f465f5/FLAG1fd7d15b9 [2023-11-24 23:55:26,650 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/data/804758e1a/1b7df5e41e8346b9814009fb20f465f5 [2023-11-24 23:55:26,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:55:26,660 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:55:26,664 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:26,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:55:26,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:55:26,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:26" (1/1) ... [2023-11-24 23:55:26,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6145cb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:26, skipping insertion in model container [2023-11-24 23:55:26,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:26" (1/1) ... [2023-11-24 23:55:26,854 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:55:28,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:28,651 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:55:29,014 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [7332] [2023-11-24 23:55:29,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:29,146 WARN L675 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:29,154 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:55:29,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29 WrapperNode [2023-11-24 23:55:29,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:29,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:29,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:55:29,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:55:29,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,352 INFO L138 Inliner]: procedures = 188, calls = 607, calls flagged for inlining = 75, calls inlined = 50, statements flattened = 1308 [2023-11-24 23:55:29,352 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:29,353 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:55:29,353 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:55:29,353 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:55:29,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,419 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,426 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,443 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:55:29,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:55:29,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:55:29,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:55:29,461 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (1/1) ... [2023-11-24 23:55:29,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:29,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:29,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:55:29,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:55:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-24 23:55:29,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-24 23:55:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure uspace_ring_map [2023-11-24 23:55:29,555 INFO L138 BoogieDeclarations]: Found implementation of procedure uspace_ring_map [2023-11-24 23:55:29,555 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_unmap_user_pages [2023-11-24 23:55:29,555 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_unmap_user_pages [2023-11-24 23:55:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:55:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure hash_64 [2023-11-24 23:55:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_64 [2023-11-24 23:55:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_release_buffers [2023-11-24 23:55:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_release_buffers [2023-11-24 23:55:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-24 23:55:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-24 23:55:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2023-11-24 23:55:29,559 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2023-11-24 23:55:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_write [2023-11-24 23:55:29,559 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_write [2023-11-24 23:55:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:55:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-24 23:55:29,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-24 23:55:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-24 23:55:29,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-24 23:55:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_open [2023-11-24 23:55:29,562 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_open [2023-11-24 23:55:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_destroy [2023-11-24 23:55:29,562 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_destroy [2023-11-24 23:55:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:55:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tgt_cmd_to_host [2023-11-24 23:55:29,564 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tgt_cmd_to_host [2023-11-24 23:55:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-24 23:55:29,564 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-24 23:55:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:55:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_ring_idx_inc [2023-11-24 23:55:29,564 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_ring_idx_inc [2023-11-24 23:55:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:55:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:55:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_head_event [2023-11-24 23:55:29,565 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_head_event [2023-11-24 23:55:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_host_put [2023-11-24 23:55:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_host_put [2023-11-24 23:55:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2023-11-24 23:55:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2023-11-24 23:55:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:55:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-24 23:55:29,566 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-24 23:55:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-11-24 23:55:29,567 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-11-24 23:55:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:55:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:55:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_ring_exit [2023-11-24 23:55:29,567 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_ring_exit [2023-11-24 23:55:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-24 23:55:29,568 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-24 23:55:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tgt_cmd_destroy [2023-11-24 23:55:29,568 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tgt_cmd_destroy [2023-11-24 23:55:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_ring_init [2023-11-24 23:55:29,569 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_ring_init [2023-11-24 23:55:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-24 23:55:29,569 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-24 23:55:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_free [2023-11-24 23:55:29,570 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_free [2023-11-24 23:55:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_poll [2023-11-24 23:55:29,571 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_poll [2023-11-24 23:55:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-24 23:55:29,571 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-24 23:55:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_host_lookup [2023-11-24 23:55:29,572 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_host_lookup [2023-11-24 23:55:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure tgt_mmap [2023-11-24 23:55:29,572 INFO L138 BoogieDeclarations]: Found implementation of procedure tgt_mmap [2023-11-24 23:55:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:55:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-24 23:55:29,573 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-24 23:55:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:55:29,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:55:29,985 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:55:29,988 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:55:31,199 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:55:31,554 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:55:31,554 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 23:55:31,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:31 BoogieIcfgContainer [2023-11-24 23:55:31,557 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:55:31,559 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:55:31,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:55:31,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:55:31,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:55:26" (1/3) ... [2023-11-24 23:55:31,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65daf902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:31, skipping insertion in model container [2023-11-24 23:55:31,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:29" (2/3) ... [2023-11-24 23:55:31,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65daf902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:31, skipping insertion in model container [2023-11-24 23:55:31,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:31" (3/3) ... [2023-11-24 23:55:31,568 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--scsi--scsi_tgt.ko-main.cil.out.i [2023-11-24 23:55:31,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:55:31,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-24 23:55:31,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:55:31,657 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;@12b62bad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:55:31,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-24 23:55:31,664 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) [2023-11-24 23:55:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:55:31,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:31,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:31,675 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)] === [2023-11-24 23:55:31,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash 873690324, now seen corresponding path program 1 times [2023-11-24 23:55:31,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:31,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130170539] [2023-11-24 23:55:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:31,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:32,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:32,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130170539] [2023-11-24 23:55:32,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130170539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:32,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:32,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403234860] [2023-11-24 23:55:32,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:32,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:32,215 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) [2023-11-24 23:55:34,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:55:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:34,689 INFO L93 Difference]: Finished difference Result 733 states and 997 transitions. [2023-11-24 23:55:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:34,692 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 [2023-11-24 23:55:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:34,708 INFO L225 Difference]: With dead ends: 733 [2023-11-24 23:55:34,708 INFO L226 Difference]: Without dead ends: 382 [2023-11-24 23:55:34,716 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 [2023-11-24 23:55:34,720 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 100 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:34,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 734 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-24 23:55:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-24 23:55:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 378. [2023-11-24 23:55:34,843 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) [2023-11-24 23:55:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 512 transitions. [2023-11-24 23:55:34,856 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 512 transitions. Word has length 12 [2023-11-24 23:55:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:34,857 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 512 transitions. [2023-11-24 23:55:34,859 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) [2023-11-24 23:55:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 512 transitions. [2023-11-24 23:55:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:55:34,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:34,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:34,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:55:34,863 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)] === [2023-11-24 23:55:34,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1248521206, now seen corresponding path program 1 times [2023-11-24 23:55:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:34,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429442858] [2023-11-24 23:55:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:35,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:35,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429442858] [2023-11-24 23:55:35,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429442858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:35,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:35,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:55:35,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640736405] [2023-11-24 23:55:35,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:35,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:35,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:35,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:35,079 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) [2023-11-24 23:55:37,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:55:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:37,664 INFO L93 Difference]: Finished difference Result 786 states and 1058 transitions. [2023-11-24 23:55:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:37,668 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 [2023-11-24 23:55:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:37,673 INFO L225 Difference]: With dead ends: 786 [2023-11-24 23:55:37,673 INFO L226 Difference]: Without dead ends: 409 [2023-11-24 23:55:37,678 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 [2023-11-24 23:55:37,679 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 75 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:37,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 679 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-11-24 23:55:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-24 23:55:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 396. [2023-11-24 23:55:37,711 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) [2023-11-24 23:55:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 530 transitions. [2023-11-24 23:55:37,716 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 530 transitions. Word has length 15 [2023-11-24 23:55:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:37,717 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 530 transitions. [2023-11-24 23:55:37,717 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) [2023-11-24 23:55:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 530 transitions. [2023-11-24 23:55:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 23:55:37,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:37,719 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] [2023-11-24 23:55:37,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:55:37,720 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)] === [2023-11-24 23:55:37,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1615844963, now seen corresponding path program 1 times [2023-11-24 23:55:37,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:37,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597088728] [2023-11-24 23:55:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:37,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:37,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597088728] [2023-11-24 23:55:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597088728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:37,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:37,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894407544] [2023-11-24 23:55:37,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:55:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:55:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:55:37,927 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) [2023-11-24 23:55:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:38,376 INFO L93 Difference]: Finished difference Result 798 states and 1078 transitions. [2023-11-24 23:55:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:55:38,377 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 [2023-11-24 23:55:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:38,381 INFO L225 Difference]: With dead ends: 798 [2023-11-24 23:55:38,381 INFO L226 Difference]: Without dead ends: 412 [2023-11-24 23:55:38,383 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 [2023-11-24 23:55:38,384 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 4 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:38,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 727 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:55:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-11-24 23:55:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 404. [2023-11-24 23:55:38,408 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) [2023-11-24 23:55:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 540 transitions. [2023-11-24 23:55:38,412 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 540 transitions. Word has length 31 [2023-11-24 23:55:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:38,413 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 540 transitions. [2023-11-24 23:55:38,413 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) [2023-11-24 23:55:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 540 transitions. [2023-11-24 23:55:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:55:38,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:38,415 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] [2023-11-24 23:55:38,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:55:38,416 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)] === [2023-11-24 23:55:38,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash 873668863, now seen corresponding path program 1 times [2023-11-24 23:55:38,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:38,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683368765] [2023-11-24 23:55:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:38,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:55:38,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:38,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683368765] [2023-11-24 23:55:38,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683368765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:38,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:38,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:55:38,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255456352] [2023-11-24 23:55:38,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:38,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:38,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:55:38,629 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) [2023-11-24 23:55:40,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:55:42,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:55:44,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:55:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:44,255 INFO L93 Difference]: Finished difference Result 802 states and 1070 transitions. [2023-11-24 23:55:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:44,256 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 [2023-11-24 23:55:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:44,259 INFO L225 Difference]: With dead ends: 802 [2023-11-24 23:55:44,259 INFO L226 Difference]: Without dead ends: 404 [2023-11-24 23:55:44,261 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 [2023-11-24 23:55:44,262 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:44,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1093 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2023-11-24 23:55:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-11-24 23:55:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2023-11-24 23:55:44,285 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) [2023-11-24 23:55:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 538 transitions. [2023-11-24 23:55:44,290 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 538 transitions. Word has length 29 [2023-11-24 23:55:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:44,290 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 538 transitions. [2023-11-24 23:55:44,291 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) [2023-11-24 23:55:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 538 transitions. [2023-11-24 23:55:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 23:55:44,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:44,293 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] [2023-11-24 23:55:44,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:55:44,293 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)] === [2023-11-24 23:55:44,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:44,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1857631415, now seen corresponding path program 1 times [2023-11-24 23:55:44,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:44,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122189136] [2023-11-24 23:55:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:44,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:44,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122189136] [2023-11-24 23:55:44,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122189136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:44,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974859807] [2023-11-24 23:55:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:44,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:44,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:44,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:55:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:44,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:55:44,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:44,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:44,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974859807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:44,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:55:44,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-24 23:55:44,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33489736] [2023-11-24 23:55:44,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:44,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:55:44,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:55:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:55:44,998 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) [2023-11-24 23:55:47,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-24 23:55:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:47,228 INFO L93 Difference]: Finished difference Result 412 states and 550 transitions. [2023-11-24 23:55:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:55:47,228 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 [2023-11-24 23:55:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:47,232 INFO L225 Difference]: With dead ends: 412 [2023-11-24 23:55:47,232 INFO L226 Difference]: Without dead ends: 411 [2023-11-24 23:55:47,233 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 [2023-11-24 23:55:47,233 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 9 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:47,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1083 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 23:55:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-24 23:55:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2023-11-24 23:55:47,255 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) [2023-11-24 23:55:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 536 transitions. [2023-11-24 23:55:47,258 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 536 transitions. Word has length 35 [2023-11-24 23:55:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:47,259 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 536 transitions. [2023-11-24 23:55:47,259 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) [2023-11-24 23:55:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 536 transitions. [2023-11-24 23:55:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 23:55:47,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:47,261 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] [2023-11-24 23:55:47,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:47,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:47,469 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)] === [2023-11-24 23:55:47,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1751999442, now seen corresponding path program 1 times [2023-11-24 23:55:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:47,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075378381] [2023-11-24 23:55:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:47,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:47,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075378381] [2023-11-24 23:55:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075378381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799480604] [2023-11-24 23:55:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:47,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:47,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e31f4b-1bf6-4700-a1a4-c8c9b371cf95/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:55:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:48,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:55:48,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:48,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:55:48,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799480604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:48,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979743247] [2023-11-24 23:55:48,140 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-11-24 23:55:48,140 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:48,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:48,149 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:48,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs