./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/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_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:57:49,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:57:49,695 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:57:49,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:57:49,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:57:49,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:57:49,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:57:49,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:57:49,749 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:57:49,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:57:49,754 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:57:49,756 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:57:49,756 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:57:49,758 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:57:49,758 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:57:49,759 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:57:49,759 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:57:49,759 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:57:49,760 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:57:49,760 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:57:49,761 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:57:49,761 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:57:49,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:57:49,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:57:49,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:57:49,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:57:49,763 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:57:49,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:57:49,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:57:49,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:57:49,766 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:57:49,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:57:49,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:57:49,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:57:49,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:57:49,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:57:49,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:57:49,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:57:49,767 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:57:49,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:57:49,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:57:49,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:57:49,768 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:57:49,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:57:49,769 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_34a87433-0670-4102-b528-3396e001f518/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad [2023-11-24 23:57:50,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:57:50,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:57:50,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:57:50,142 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:57:50,143 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:57:50,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2023-11-24 23:57:53,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:57:53,838 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:57:53,839 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2023-11-24 23:57:53,887 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/data/ddc0675d4/c5c73609619643a785bc5139e9b7c54f/FLAGfa4790acd [2023-11-24 23:57:53,906 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/data/ddc0675d4/c5c73609619643a785bc5139e9b7c54f [2023-11-24 23:57:53,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:57:53,912 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:57:53,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:57:53,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:57:53,922 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:57:53,923 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:57:53" (1/1) ... [2023-11-24 23:57:53,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eac2bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:53, skipping insertion in model container [2023-11-24 23:57:53,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:57:53" (1/1) ... [2023-11-24 23:57:54,087 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:57:55,892 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2023-11-24 23:57:56,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:57:56,072 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:57:56,193 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [4245] [2023-11-24 23:57:56,195 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [4252] [2023-11-24 23:57:56,197 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bsrl %1,%0": "=r" (r): "rm" (x), "0" (-1)); [4266] [2023-11-24 23:57:56,198 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("661:\n\tcall __sw_hweight32\n662:\n.skip -(((6651f-6641f)-(662b-661b)) > 0) * ((6651f-6641f)-(662b-661b)),0x90\n663:\n.pushsection .altinstructions,\"a\"\n .long 661b - .\n .long 6641f - .\n .word ( 4*32+23)\n .byte 663b-661b\n .byte 6651f-6641f\n .byte 663b-662b\n.popsection\n.pushsection .altinstr_replacement, \"ax\"\n6641:\n\t.byte 0xf3,0x40,0x0f,0xb8,0xc7\n6651:\n\t.popsection": "=a" (res): "D" (w)); [4275] [2023-11-24 23:57:56,341 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--32_7a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/988/dscv_tempdir/dscv/ri/32_7a/drivers/md/dm-raid.c"), "i" (791), "i" (12UL)); [5389-5390] [2023-11-24 23:57:56,492 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2023-11-24 23:57:56,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:57:56,647 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:57:56,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56 WrapperNode [2023-11-24 23:57:56,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:57:56,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:57:56,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:57:56,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:57:56,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:56,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:56,965 INFO L138 Inliner]: procedures = 221, calls = 1690, calls flagged for inlining = 84, calls inlined = 76, statements flattened = 4946 [2023-11-24 23:57:56,966 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:57:56,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:57:56,967 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:57:56,967 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:57:56,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:56,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:57:57,310 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:57:57,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:57:57,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:57:57,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (1/1) ... [2023-11-24 23:57:57,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:57:57,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:57,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:57:57,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a87433-0670-4102-b528-3396e001f518/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:57:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_get_mode [2023-11-24 23:57:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_get_mode [2023-11-24 23:57:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2023-11-24 23:57:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2023-11-24 23:57:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-24 23:57:57,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-24 23:57:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-24 23:57:57,414 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-24 23:57:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2023-11-24 23:57:57,414 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2023-11-24 23:57:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_format [2023-11-24 23:57:57,415 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_format [2023-11-24 23:57:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-24 23:57:57,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-24 23:57:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure raid_io_hints [2023-11-24 23:57:57,417 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_io_hints [2023-11-24 23:57:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure raid_message [2023-11-24 23:57:57,418 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_message [2023-11-24 23:57:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-24 23:57:57,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-24 23:57:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-11-24 23:57:57,419 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-11-24 23:57:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_copies [2023-11-24 23:57:57,420 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_copies [2023-11-24 23:57:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-24 23:57:57,421 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-24 23:57:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:57:57,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:57:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure context_free [2023-11-24 23:57:57,421 INFO L138 BoogieDeclarations]: Found implementation of procedure context_free [2023-11-24 23:57:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-24 23:57:57,422 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-24 23:57:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2023-11-24 23:57:57,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2023-11-24 23:57:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure super_validate [2023-11-24 23:57:57,422 INFO L138 BoogieDeclarations]: Found implementation of procedure super_validate [2023-11-24 23:57:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure do_table_event [2023-11-24 23:57:57,423 INFO L138 BoogieDeclarations]: Found implementation of procedure do_table_event [2023-11-24 23:57:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:57:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-24 23:57:57,423 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-24 23:57:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:57:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure sync_page_io [2023-11-24 23:57:57,424 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_page_io [2023-11-24 23:57:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-24 23:57:57,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-24 23:57:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure to_sector [2023-11-24 23:57:57,424 INFO L138 BoogieDeclarations]: Found implementation of procedure to_sector [2023-11-24 23:57:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:57:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:57:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-24 23:57:57,425 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-24 23:57:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure raid_iterate_devices [2023-11-24 23:57:57,425 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_iterate_devices [2023-11-24 23:57:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2023-11-24 23:57:57,426 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2023-11-24 23:57:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2023-11-24 23:57:57,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2023-11-24 23:57:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:57:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure mddev_suspend [2023-11-24 23:57:57,428 INFO L138 BoogieDeclarations]: Found implementation of procedure mddev_suspend [2023-11-24 23:57:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-24 23:57:57,428 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-24 23:57:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure super_sync [2023-11-24 23:57:57,429 INFO L138 BoogieDeclarations]: Found implementation of procedure super_sync [2023-11-24 23:57:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:57:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure is_power_of_2 [2023-11-24 23:57:57,430 INFO L138 BoogieDeclarations]: Found implementation of procedure is_power_of_2 [2023-11-24 23:57:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2023-11-24 23:57:57,430 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2023-11-24 23:57:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-24 23:57:57,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-24 23:57:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:57:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure raid_merge [2023-11-24 23:57:57,431 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_merge [2023-11-24 23:57:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-24 23:57:57,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-24 23:57:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure raid_map [2023-11-24 23:57:57,432 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_map [2023-11-24 23:57:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:57:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:57:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2023-11-24 23:57:57,433 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2023-11-24 23:57:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure scnprintf [2023-11-24 23:57:57,433 INFO L138 BoogieDeclarations]: Found implementation of procedure scnprintf [2023-11-24 23:57:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure md_stop [2023-11-24 23:57:57,434 INFO L138 BoogieDeclarations]: Found implementation of procedure md_stop [2023-11-24 23:57:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure raid_status [2023-11-24 23:57:57,434 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_status [2023-11-24 23:57:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2023-11-24 23:57:57,434 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2023-11-24 23:57:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:57:57,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:57:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-24 23:57:57,435 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-24 23:57:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:57:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure raid_dtr [2023-11-24 23:57:57,435 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_dtr [2023-11-24 23:57:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2023-11-24 23:57:57,436 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2023-11-24 23:57:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:57:57,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:57:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-24 23:57:57,437 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-24 23:57:58,029 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:57:58,033 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:57:58,432 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-24 23:58:02,695 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:58:04,131 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:58:04,131 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 23:58:04,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:04 BoogieIcfgContainer [2023-11-24 23:58:04,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:58:04,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:58:04,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:58:04,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:58:04,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:57:53" (1/3) ... [2023-11-24 23:58:04,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1b8669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:04, skipping insertion in model container [2023-11-24 23:58:04,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:56" (2/3) ... [2023-11-24 23:58:04,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1b8669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:04, skipping insertion in model container [2023-11-24 23:58:04,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:04" (3/3) ... [2023-11-24 23:58:04,145 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2023-11-24 23:58:04,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:58:04,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:58:04,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:58:04,292 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7073134c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:58:04,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:58:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 1049 states, 735 states have (on average 1.4408163265306122) internal successors, (1059), 756 states have internal predecessors, (1059), 267 states have call successors, (267), 46 states have call predecessors, (267), 45 states have return successors, (263), 259 states have call predecessors, (263), 263 states have call successors, (263) [2023-11-24 23:58:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-24 23:58:04,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:04,329 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:04,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:04,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1106317178, now seen corresponding path program 1 times [2023-11-24 23:58:04,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:04,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197347230] [2023-11-24 23:58:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:04,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-24 23:58:05,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:05,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197347230] [2023-11-24 23:58:05,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197347230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:05,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:05,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556141607] [2023-11-24 23:58:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:05,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:05,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:05,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:05,697 INFO L87 Difference]: Start difference. First operand has 1049 states, 735 states have (on average 1.4408163265306122) internal successors, (1059), 756 states have internal predecessors, (1059), 267 states have call successors, (267), 46 states have call predecessors, (267), 45 states have return successors, (263), 259 states have call predecessors, (263), 263 states have call successors, (263) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-24 23:58:08,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:58:12,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-24 23:58:14,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:58:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:14,803 INFO L93 Difference]: Finished difference Result 3051 states and 4635 transitions. [2023-11-24 23:58:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:14,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 170 [2023-11-24 23:58:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:14,840 INFO L225 Difference]: With dead ends: 3051 [2023-11-24 23:58:14,841 INFO L226 Difference]: Without dead ends: 2023 [2023-11-24 23:58:14,852 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 23:58:14,855 INFO L413 NwaCegarLoop]: 1436 mSDtfsCounter, 1498 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:14,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 2862 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2023-11-24 23:58:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2023-11-24 23:58:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2020. [2023-11-24 23:58:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 1433 states have (on average 1.4375436147941383) internal successors, (2060), 1459 states have internal predecessors, (2060), 501 states have call successors, (501), 86 states have call predecessors, (501), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-24 23:58:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3057 transitions. [2023-11-24 23:58:15,118 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3057 transitions. Word has length 170 [2023-11-24 23:58:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:15,125 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 3057 transitions. [2023-11-24 23:58:15,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-24 23:58:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3057 transitions. [2023-11-24 23:58:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-24 23:58:15,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:15,142 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:58:15,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:15,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash -35166643, now seen corresponding path program 1 times [2023-11-24 23:58:15,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:15,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035030418] [2023-11-24 23:58:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:15,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-24 23:58:15,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:15,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035030418] [2023-11-24 23:58:15,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035030418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:15,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:15,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:15,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745072281] [2023-11-24 23:58:15,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:15,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:15,608 INFO L87 Difference]: Start difference. First operand 2020 states and 3057 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:18,137 INFO L93 Difference]: Finished difference Result 2022 states and 3058 transitions. [2023-11-24 23:58:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:18,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 177 [2023-11-24 23:58:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:18,157 INFO L225 Difference]: With dead ends: 2022 [2023-11-24 23:58:18,157 INFO L226 Difference]: Without dead ends: 2019 [2023-11-24 23:58:18,160 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 23:58:18,161 INFO L413 NwaCegarLoop]: 1421 mSDtfsCounter, 1525 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:18,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 1421 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-24 23:58:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2023-11-24 23:58:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 2019. [2023-11-24 23:58:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1433 states have (on average 1.4368457780879273) internal successors, (2059), 1458 states have internal predecessors, (2059), 500 states have call successors, (500), 86 states have call predecessors, (500), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-24 23:58:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3055 transitions. [2023-11-24 23:58:18,301 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3055 transitions. Word has length 177 [2023-11-24 23:58:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:18,302 INFO L495 AbstractCegarLoop]: Abstraction has 2019 states and 3055 transitions. [2023-11-24 23:58:18,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3055 transitions. [2023-11-24 23:58:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-24 23:58:18,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:18,311 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:18,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:58:18,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:18,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1090547803, now seen corresponding path program 1 times [2023-11-24 23:58:18,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:18,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260096876] [2023-11-24 23:58:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-24 23:58:18,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:18,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260096876] [2023-11-24 23:58:18,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260096876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:18,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:18,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:18,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469557675] [2023-11-24 23:58:18,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:18,904 INFO L87 Difference]: Start difference. First operand 2019 states and 3055 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:20,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:58:22,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:58:25,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-24 23:58:25,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:25,897 INFO L93 Difference]: Finished difference Result 2021 states and 3056 transitions. [2023-11-24 23:58:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 178 [2023-11-24 23:58:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:25,918 INFO L225 Difference]: With dead ends: 2021 [2023-11-24 23:58:25,918 INFO L226 Difference]: Without dead ends: 2018 [2023-11-24 23:58:25,920 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 23:58:25,921 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 1522 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:25,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 1419 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2023-11-24 23:58:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2023-11-24 23:58:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2018. [2023-11-24 23:58:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1433 states have (on average 1.4361479413817166) internal successors, (2058), 1457 states have internal predecessors, (2058), 499 states have call successors, (499), 86 states have call predecessors, (499), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-24 23:58:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 3053 transitions. [2023-11-24 23:58:26,095 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 3053 transitions. Word has length 178 [2023-11-24 23:58:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:26,097 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 3053 transitions. [2023-11-24 23:58:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 3053 transitions. [2023-11-24 23:58:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-24 23:58:26,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:26,103 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:26,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:58:26,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:26,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:26,106 INFO L85 PathProgramCache]: Analyzing trace with hash 552379472, now seen corresponding path program 1 times [2023-11-24 23:58:26,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:26,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611272778] [2023-11-24 23:58:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-24 23:58:26,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611272778] [2023-11-24 23:58:26,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611272778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:26,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:26,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:26,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400966989] [2023-11-24 23:58:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:26,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:26,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:26,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:26,506 INFO L87 Difference]: Start difference. First operand 2018 states and 3053 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:28,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 23:58:32,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-24 23:58:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:32,412 INFO L93 Difference]: Finished difference Result 2020 states and 3054 transitions. [2023-11-24 23:58:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 179 [2023-11-24 23:58:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:32,430 INFO L225 Difference]: With dead ends: 2020 [2023-11-24 23:58:32,430 INFO L226 Difference]: Without dead ends: 2017 [2023-11-24 23:58:32,432 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 23:58:32,433 INFO L413 NwaCegarLoop]: 1417 mSDtfsCounter, 1519 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:32,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 1417 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2023-11-24 23:58:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2023-11-24 23:58:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2017. [2023-11-24 23:58:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 1433 states have (on average 1.435450104675506) internal successors, (2057), 1456 states have internal predecessors, (2057), 498 states have call successors, (498), 86 states have call predecessors, (498), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-24 23:58:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 3051 transitions. [2023-11-24 23:58:32,576 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 3051 transitions. Word has length 179 [2023-11-24 23:58:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:32,577 INFO L495 AbstractCegarLoop]: Abstraction has 2017 states and 3051 transitions. [2023-11-24 23:58:32,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 3051 transitions. [2023-11-24 23:58:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-24 23:58:32,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:32,582 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:32,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:58:32,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:32,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:32,583 INFO L85 PathProgramCache]: Analyzing trace with hash -56477688, now seen corresponding path program 1 times [2023-11-24 23:58:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:32,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498276945] [2023-11-24 23:58:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:32,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-24 23:58:32,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498276945] [2023-11-24 23:58:32,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498276945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:32,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:32,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188433585] [2023-11-24 23:58:32,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:32,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:32,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:32,932 INFO L87 Difference]: Start difference. First operand 2017 states and 3051 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:39,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-24 23:58:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:39,751 INFO L93 Difference]: Finished difference Result 3977 states and 6024 transitions. [2023-11-24 23:58:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 180 [2023-11-24 23:58:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:39,783 INFO L225 Difference]: With dead ends: 3977 [2023-11-24 23:58:39,783 INFO L226 Difference]: Without dead ends: 3968 [2023-11-24 23:58:39,787 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 23:58:39,787 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 1498 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:39,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 2788 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2023-11-24 23:58:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2023-11-24 23:58:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3968. [2023-11-24 23:58:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 2830 states have (on average 1.4378091872791519) internal successors, (4069), 2873 states have internal predecessors, (4069), 972 states have call successors, (972), 168 states have call predecessors, (972), 165 states have return successors, (970), 952 states have call predecessors, (970), 970 states have call successors, (970) [2023-11-24 23:58:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 6011 transitions. [2023-11-24 23:58:40,134 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 6011 transitions. Word has length 180 [2023-11-24 23:58:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:40,135 INFO L495 AbstractCegarLoop]: Abstraction has 3968 states and 6011 transitions. [2023-11-24 23:58:40,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-24 23:58:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 6011 transitions. [2023-11-24 23:58:40,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-24 23:58:40,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:40,152 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:40,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:58:40,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:40,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash 987938777, now seen corresponding path program 1 times [2023-11-24 23:58:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:40,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396890463] [2023-11-24 23:58:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:40,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-24 23:58:40,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:40,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396890463] [2023-11-24 23:58:40,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396890463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:40,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:40,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226657457] [2023-11-24 23:58:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:40,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:40,651 INFO L87 Difference]: Start difference. First operand 3968 states and 6011 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-24 23:58:42,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []