./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2 --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 8946ad2f029076f7c4f90de60a8c48e069f80fec06a0c6d7a5dc3a1fc4182879 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:22:56,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:22:56,194 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-02 11:22:56,201 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:22:56,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:22:56,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:22:56,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:22:56,242 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:22:56,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:22:56,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:22:56,245 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:22:56,245 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:22:56,246 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:22:56,246 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:22:56,246 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:22:56,247 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:22:56,247 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:22:56,247 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:22:56,248 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:22:56,251 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:22:56,251 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:22:56,252 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:22:56,252 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:22:56,253 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:22:56,253 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:22:56,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:22:56,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:22:56,255 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:22:56,255 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:22:56,255 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:22:56,256 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:22:56,256 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:22:56,256 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:22:56,257 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:22:56,257 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:22:56,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:22:56,258 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:22:56,258 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:22:56,258 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:22:56,259 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:22:56,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:22:56,262 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:22:56,262 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:22:56,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:22:56,263 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_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8946ad2f029076f7c4f90de60a8c48e069f80fec06a0c6d7a5dc3a1fc4182879 [2024-11-02 11:22:56,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:22:56,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:22:56,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:22:56,631 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:22:56,631 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:22:56,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i Unable to find full path for "g++" [2024-11-02 11:22:58,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:22:59,242 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:22:59,243 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i [2024-11-02 11:22:59,278 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/data/ed06d6841/6da0185ff44e4b8ab9fc53031d835b16/FLAG6115e9765 [2024-11-02 11:22:59,299 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/data/ed06d6841/6da0185ff44e4b8ab9fc53031d835b16 [2024-11-02 11:22:59,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:22:59,303 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:22:59,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:22:59,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:22:59,311 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:22:59,312 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:22:59" (1/1) ... [2024-11-02 11:22:59,313 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d17721d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:22:59, skipping insertion in model container [2024-11-02 11:22:59,314 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:22:59" (1/1) ... [2024-11-02 11:22:59,410 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:23:00,556 WARN L251 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_3645d14a-c7e5-41a6-964e-daf89a48ba87/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i[121503,121516] [2024-11-02 11:23:00,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:00,631 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:23:00,859 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bt %2,%1\n\tsbb %0,%0": "=r" (oldbit): "m" (*((unsigned long *)addr)), "Ir" (nr)); [3095-3096] [2024-11-02 11:23:00,878 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 *)"include/linux/scatterlist.h"), "i" (63), "i" (12UL)); [3374-3375] [2024-11-02 11:23:00,879 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 *)"include/linux/scatterlist.h"), "i" (65), "i" (12UL)); [3382-3383] [2024-11-02 11:23:00,880 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 *)"include/linux/scatterlist.h"), "i" (66), "i" (12UL)); [3390-3391] [2024-11-02 11:23:00,909 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 *)"/home/ldvuser/andrianov/commit-tester-work/task-014--linux-stable--dir/work/current--X--drivers/block/virtio_blk.ko--X--defaultlinux-stable-39a1d13-1--X--101_1a--X--cpachecker/linux-stable-39a1d13-1/csd_deg_dscv/11/dscv_tempdir/dscv/ri/101_1a/drivers/block/virtio_blk.c"), "i" (123), "i" (12UL)); [3605-3606] [2024-11-02 11:23:00,917 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 *)"/home/ldvuser/andrianov/commit-tester-work/task-014--linux-stable--dir/work/current--X--drivers/block/virtio_blk.ko--X--defaultlinux-stable-39a1d13-1--X--101_1a--X--cpachecker/linux-stable-39a1d13-1/csd_deg_dscv/11/dscv_tempdir/dscv/ri/101_1a/drivers/block/virtio_blk.c"), "i" (177), "i" (12UL)); [3680-3681] [2024-11-02 11:23:00,990 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 *)"/home/ldvuser/andrianov/commit-tester-work/task-014--linux-stable--dir/work/current--X--drivers/block/virtio_blk.ko--X--defaultlinux-stable-39a1d13-1--X--101_1a--X--cpachecker/linux-stable-39a1d13-1/csd_deg_dscv/11/dscv_tempdir/dscv/ri/101_1a/drivers/block/virtio_blk.c"), "i" (467), "i" (12UL)); [4002-4003] [2024-11-02 11:23:01,010 WARN L251 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_3645d14a-c7e5-41a6-964e-daf89a48ba87/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i[121503,121516] [2024-11-02 11:23:01,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:01,067 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:23:01,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01 WrapperNode [2024-11-02 11:23:01,068 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:23:01,069 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:01,070 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:23:01,070 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:23:01,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,308 INFO L138 Inliner]: procedures = 143, calls = 525, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 1748 [2024-11-02 11:23:01,308 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:01,309 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:23:01,309 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:23:01,309 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:23:01,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,424 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,440 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,448 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:23:01,462 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:23:01,462 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:23:01,462 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:23:01,463 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (1/1) ... [2024-11-02 11:23:01,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:23:01,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:01,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:23:01,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:23:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_max_segment_size [2024-11-02 11:23:01,547 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_max_segment_size [2024-11-02 11:23:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-02 11:23:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure virtio_config_buf [2024-11-02 11:23:01,547 INFO L138 BoogieDeclarations]: Found implementation of procedure virtio_config_buf [2024-11-02 11:23:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-02 11:23:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2024-11-02 11:23:01,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2024-11-02 11:23:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:23:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-02 11:23:01,548 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-02 11:23:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure req_get_ioprio [2024-11-02 11:23:01,549 INFO L138 BoogieDeclarations]: Found implementation of procedure req_get_ioprio [2024-11-02 11:23:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2024-11-02 11:23:01,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2024-11-02 11:23:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-02 11:23:01,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-02 11:23:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_free [2024-11-02 11:23:01,552 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_free [2024-11-02 11:23:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_buf [2024-11-02 11:23:01,553 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_buf [2024-11-02 11:23:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2024-11-02 11:23:01,553 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2024-11-02 11:23:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:23:01,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2024-11-02 11:23:01,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2024-11-02 11:23:01,555 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2024-11-02 11:23:01,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2024-11-02 11:23:01,556 INFO L130 BoogieDeclarations]: Found specification of procedure index_to_minor [2024-11-02 11:23:01,556 INFO L138 BoogieDeclarations]: Found implementation of procedure index_to_minor [2024-11-02 11:23:01,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2024-11-02 11:23:01,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2024-11-02 11:23:01,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 11:23:01,557 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 11:23:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:23:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2024-11-02 11:23:01,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2024-11-02 11:23:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2024-11-02 11:23:01,559 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2024-11-02 11:23:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:23:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure virtio_has_feature [2024-11-02 11:23:01,560 INFO L138 BoogieDeclarations]: Found implementation of procedure virtio_has_feature [2024-11-02 11:23:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:23:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 11:23:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2024-11-02 11:23:01,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2024-11-02 11:23:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure virtblk_remove [2024-11-02 11:23:01,561 INFO L138 BoogieDeclarations]: Found implementation of procedure virtblk_remove [2024-11-02 11:23:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_destroy [2024-11-02 11:23:01,561 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_destroy [2024-11-02 11:23:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 11:23:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2024-11-02 11:23:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2024-11-02 11:23:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2024-11-02 11:23:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2024-11-02 11:23:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:23:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2024-11-02 11:23:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2024-11-02 11:23:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_ordered [2024-11-02 11:23:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_ordered [2024-11-02 11:23:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:23:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:23:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:23:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2024-11-02 11:23:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2024-11-02 11:23:02,092 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:23:02,095 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:23:02,885 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2024-11-02 11:23:06,141 INFO L? ?]: Removed 979 outVars from TransFormulas that were not future-live. [2024-11-02 11:23:06,141 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:23:06,673 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:23:06,673 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 11:23:06,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:06 BoogieIcfgContainer [2024-11-02 11:23:06,674 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:23:06,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:23:06,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:23:06,679 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:23:06,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:22:59" (1/3) ... [2024-11-02 11:23:06,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb1b708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:06, skipping insertion in model container [2024-11-02 11:23:06,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:01" (2/3) ... [2024-11-02 11:23:06,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb1b708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:06, skipping insertion in model container [2024-11-02 11:23:06,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:06" (3/3) ... [2024-11-02 11:23:06,683 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point_ldv-val-v0.8.cil.out.i [2024-11-02 11:23:06,703 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:23:06,704 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:23:06,797 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:23:06,806 INFO L333 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, 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;@4342d8e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:23:06,806 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:23:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 306 states, 195 states have (on average 1.3487179487179488) internal successors, (263), 210 states have internal predecessors, (263), 84 states have call successors, (84), 26 states have call predecessors, (84), 25 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2024-11-02 11:23:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-02 11:23:06,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:06,823 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:23:06,824 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:06,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:06,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1106510757, now seen corresponding path program 1 times [2024-11-02 11:23:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:06,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545071704] [2024-11-02 11:23:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:23:07,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:07,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545071704] [2024-11-02 11:23:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545071704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:23:07,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263896930] [2024-11-02 11:23:07,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:07,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:07,825 INFO L87 Difference]: Start difference. First operand has 306 states, 195 states have (on average 1.3487179487179488) internal successors, (263), 210 states have internal predecessors, (263), 84 states have call successors, (84), 26 states have call predecessors, (84), 25 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-02 11:23:09,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 11:23:11,868 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 [] [2024-11-02 11:23:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:12,767 INFO L93 Difference]: Finished difference Result 878 states and 1230 transitions. [2024-11-02 11:23:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-11-02 11:23:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:12,796 INFO L225 Difference]: With dead ends: 878 [2024-11-02 11:23:12,797 INFO L226 Difference]: Without dead ends: 556 [2024-11-02 11:23:12,806 INFO L431 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 [2024-11-02 11:23:12,810 INFO L432 NwaCegarLoop]: 351 mSDtfsCounter, 381 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:12,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 695 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2024-11-02 11:23:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2024-11-02 11:23:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 553. [2024-11-02 11:23:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 358 states have (on average 1.2932960893854748) internal successors, (463), 373 states have internal predecessors, (463), 149 states have call successors, (149), 46 states have call predecessors, (149), 45 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2024-11-02 11:23:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 759 transitions. [2024-11-02 11:23:12,922 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 759 transitions. Word has length 33 [2024-11-02 11:23:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:12,923 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 759 transitions. [2024-11-02 11:23:12,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-02 11:23:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 759 transitions. [2024-11-02 11:23:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 11:23:12,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:12,927 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:23:12,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:23:12,928 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:12,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash 991883668, now seen corresponding path program 1 times [2024-11-02 11:23:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648673408] [2024-11-02 11:23:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:12,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 11:23:13,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648673408] [2024-11-02 11:23:13,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648673408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:13,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:13,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:23:13,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960893811] [2024-11-02 11:23:13,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:13,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:13,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:13,240 INFO L87 Difference]: Start difference. First operand 553 states and 759 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 11:23:15,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 11:23:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:15,951 INFO L93 Difference]: Finished difference Result 1074 states and 1473 transitions. [2024-11-02 11:23:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:15,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-11-02 11:23:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:15,965 INFO L225 Difference]: With dead ends: 1074 [2024-11-02 11:23:15,966 INFO L226 Difference]: Without dead ends: 1068 [2024-11-02 11:23:15,967 INFO L431 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 [2024-11-02 11:23:15,969 INFO L432 NwaCegarLoop]: 327 mSDtfsCounter, 367 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:15,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 635 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2024-11-02 11:23:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2024-11-02 11:23:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2024-11-02 11:23:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 693 states have (on average 1.2914862914862915) internal successors, (895), 722 states have internal predecessors, (895), 285 states have call successors, (285), 90 states have call predecessors, (285), 89 states have return successors, (283), 283 states have call predecessors, (283), 283 states have call successors, (283) [2024-11-02 11:23:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1463 transitions. [2024-11-02 11:23:16,082 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1463 transitions. Word has length 36 [2024-11-02 11:23:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:16,082 INFO L471 AbstractCegarLoop]: Abstraction has 1068 states and 1463 transitions. [2024-11-02 11:23:16,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 11:23:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1463 transitions. [2024-11-02 11:23:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-02 11:23:16,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:16,095 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:16,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:23:16,095 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:16,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1338273684, now seen corresponding path program 1 times [2024-11-02 11:23:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:16,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895140644] [2024-11-02 11:23:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:16,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 11:23:16,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895140644] [2024-11-02 11:23:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895140644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:16,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:16,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:23:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964599112] [2024-11-02 11:23:16,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:16,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:16,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:16,423 INFO L87 Difference]: Start difference. First operand 1068 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-02 11:23:18,433 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 [] [2024-11-02 11:23:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:19,187 INFO L93 Difference]: Finished difference Result 3059 states and 4177 transitions. [2024-11-02 11:23:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 83 [2024-11-02 11:23:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:19,202 INFO L225 Difference]: With dead ends: 3059 [2024-11-02 11:23:19,203 INFO L226 Difference]: Without dead ends: 2001 [2024-11-02 11:23:19,207 INFO L431 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 [2024-11-02 11:23:19,209 INFO L432 NwaCegarLoop]: 334 mSDtfsCounter, 334 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:19,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 644 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2024-11-02 11:23:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2024-11-02 11:23:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1996. [2024-11-02 11:23:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1289 states have (on average 1.2870442203258339) internal successors, (1659), 1346 states have internal predecessors, (1659), 531 states have call successors, (531), 176 states have call predecessors, (531), 175 states have return successors, (529), 529 states have call predecessors, (529), 529 states have call successors, (529) [2024-11-02 11:23:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2719 transitions. [2024-11-02 11:23:19,324 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2719 transitions. Word has length 83 [2024-11-02 11:23:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:19,324 INFO L471 AbstractCegarLoop]: Abstraction has 1996 states and 2719 transitions. [2024-11-02 11:23:19,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-02 11:23:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2719 transitions. [2024-11-02 11:23:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-02 11:23:19,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:19,332 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:19,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:23:19,333 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:19,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -32858204, now seen corresponding path program 1 times [2024-11-02 11:23:19,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:19,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829985782] [2024-11-02 11:23:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-02 11:23:20,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829985782] [2024-11-02 11:23:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829985782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:20,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:20,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 11:23:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859556197] [2024-11-02 11:23:20,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:20,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:23:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:23:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:23:20,231 INFO L87 Difference]: Start difference. First operand 1996 states and 2719 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-02 11:23:22,240 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 [] [2024-11-02 11:23:24,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 11:23:26,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 11:23:28,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 11:23:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:29,489 INFO L93 Difference]: Finished difference Result 3057 states and 4202 transitions. [2024-11-02 11:23:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:23:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2024-11-02 11:23:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:29,517 INFO L225 Difference]: With dead ends: 3057 [2024-11-02 11:23:29,517 INFO L226 Difference]: Without dead ends: 2012 [2024-11-02 11:23:29,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:23:29,524 INFO L432 NwaCegarLoop]: 327 mSDtfsCounter, 0 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:29,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1302 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2024-11-02 11:23:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2024-11-02 11:23:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 2000. [2024-11-02 11:23:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1291 states have (on average 1.286599535243997) internal successors, (1661), 1350 states have internal predecessors, (1661), 531 states have call successors, (531), 176 states have call predecessors, (531), 177 states have return successors, (545), 529 states have call predecessors, (545), 529 states have call successors, (545) [2024-11-02 11:23:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2737 transitions. [2024-11-02 11:23:29,653 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2737 transitions. Word has length 113 [2024-11-02 11:23:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:29,654 INFO L471 AbstractCegarLoop]: Abstraction has 2000 states and 2737 transitions. [2024-11-02 11:23:29,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-02 11:23:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2737 transitions. [2024-11-02 11:23:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-02 11:23:29,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:29,660 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:29,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:23:29,661 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:29,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash 203395726, now seen corresponding path program 1 times [2024-11-02 11:23:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:29,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066943551] [2024-11-02 11:23:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-02 11:23:30,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066943551] [2024-11-02 11:23:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066943551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:23:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25432031] [2024-11-02 11:23:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:30,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:23:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:30,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:23:30,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3645d14a-c7e5-41a6-964e-daf89a48ba87/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:23:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:31,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 11:23:31,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:23:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-02 11:23:31,446 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:23:31,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25432031] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:31,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:23:31,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-02 11:23:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758801856] [2024-11-02 11:23:31,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:31,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:23:31,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:23:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:23:31,450 INFO L87 Difference]: Start difference. First operand 2000 states and 2737 transitions. Second operand has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 11:23:33,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []