./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 30e01a73 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_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/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_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8946ad2f029076f7c4f90de60a8c48e069f80fec06a0c6d7a5dc3a1fc4182879 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:51,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:51,503 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:16:51,511 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:51,512 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:51,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:51,552 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:51,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:51,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:51,559 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:51,560 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:51,561 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:51,561 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:51,563 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:51,564 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:51,564 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:51,565 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:51,566 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:51,566 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:51,568 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:51,569 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:51,569 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:51,571 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:51,571 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:51,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:51,572 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:51,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:51,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:51,574 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:51,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:51,576 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:51,576 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:51,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:51,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:51,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:51,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:51,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:51,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:51,579 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:51,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:51,580 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:51,581 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:51,581 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:51,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:51,582 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_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8946ad2f029076f7c4f90de60a8c48e069f80fec06a0c6d7a5dc3a1fc4182879 [2023-11-23 21:16:51,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:51,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:51,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:51,963 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:51,963 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:51,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/../../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 [2023-11-23 21:16:55,168 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:16:55,746 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:16:55,747 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/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 [2023-11-23 21:16:55,797 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/data/c149fd2f3/dd5384f9dcd34692be17537acd7ec32c/FLAGb81e44465 [2023-11-23 21:16:55,818 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/data/c149fd2f3/dd5384f9dcd34692be17537acd7ec32c [2023-11-23 21:16:55,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:16:55,826 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:16:55,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:55,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:16:55,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:16:55,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56348f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:55, skipping insertion in model container [2023-11-23 21:16:55,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:55" (1/1) ... [2023-11-23 21:16:55,994 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:16:57,086 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_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/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] [2023-11-23 21:16:57,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:57,177 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:16:57,292 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] [2023-11-23 21:16:57,320 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] [2023-11-23 21:16:57,322 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] [2023-11-23 21:16:57,329 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] [2023-11-23 21:16:57,367 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] [2023-11-23 21:16:57,375 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] [2023-11-23 21:16:57,453 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] [2023-11-23 21:16:57,499 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_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/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] [2023-11-23 21:16:57,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:57,564 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:16:57,572 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:16:57,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57 WrapperNode [2023-11-23 21:16:57,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:57,574 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:57,574 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:16:57,574 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:16:57,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,691 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,819 INFO L138 Inliner]: procedures = 142, calls = 540, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 1712 [2023-11-23 21:16:57,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:57,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:16:57,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:16:57,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:16:57,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,929 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,939 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,960 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:16:57,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:16:57,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:16:57,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:16:57,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (1/1) ... [2023-11-23 21:16:57,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:58,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:58,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:16:58,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:16:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_max_segment_size [2023-11-23 21:16:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_max_segment_size [2023-11-23 21:16:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure virtio_config_buf [2023-11-23 21:16:58,113 INFO L138 BoogieDeclarations]: Found implementation of procedure virtio_config_buf [2023-11-23 21:16:58,113 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:16:58,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:16:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:16:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:16:58,114 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:16:58,114 INFO L130 BoogieDeclarations]: Found specification of procedure req_get_ioprio [2023-11-23 21:16:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure req_get_ioprio [2023-11-23 21:16:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2023-11-23 21:16:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2023-11-23 21:16:58,115 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:16:58,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:16:58,116 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_free [2023-11-23 21:16:58,116 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_free [2023-11-23 21:16:58,116 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_buf [2023-11-23 21:16:58,116 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_buf [2023-11-23 21:16:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:16:58,117 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:16:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:16:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:16:58,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:16:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:16:58,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:16:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure index_to_minor [2023-11-23 21:16:58,118 INFO L138 BoogieDeclarations]: Found implementation of procedure index_to_minor [2023-11-23 21:16:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:16:58,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:16:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:16:58,119 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:16:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:16:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:16:58,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:16:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:16:58,120 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:16:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:16:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure virtio_has_feature [2023-11-23 21:16:58,120 INFO L138 BoogieDeclarations]: Found implementation of procedure virtio_has_feature [2023-11-23 21:16:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:16:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:16:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-23 21:16:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:16:58,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:16:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure virtblk_remove [2023-11-23 21:16:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure virtblk_remove [2023-11-23 21:16:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_destroy [2023-11-23 21:16:58,122 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_destroy [2023-11-23 21:16:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:16:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2023-11-23 21:16:58,123 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2023-11-23 21:16:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 21:16:58,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 21:16:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:16:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:16:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2023-11-23 21:16:58,126 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2023-11-23 21:16:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_ordered [2023-11-23 21:16:58,127 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_ordered [2023-11-23 21:16:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:16:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:16:58,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:16:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:16:58,128 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:16:58,592 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:16:58,596 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:16:59,365 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:17:00,102 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:00,685 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:00,685 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:17:00,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:00 BoogieIcfgContainer [2023-11-23 21:17:00,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:00,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:00,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:00,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:00,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:55" (1/3) ... [2023-11-23 21:17:00,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c9214c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:00, skipping insertion in model container [2023-11-23 21:17:00,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:57" (2/3) ... [2023-11-23 21:17:00,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c9214c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:00, skipping insertion in model container [2023-11-23 21:17:00,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:00" (3/3) ... [2023-11-23 21:17:00,699 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 [2023-11-23 21:17:00,723 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:00,723 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:00,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:00,813 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;@745e6a5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:00,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 303 states, 192 states have (on average 1.328125) internal successors, (255), 204 states have internal predecessors, (255), 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) [2023-11-23 21:17:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 21:17:00,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:00,836 INFO L195 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] [2023-11-23 21:17:00,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:00,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1936981251, now seen corresponding path program 1 times [2023-11-23 21:17:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:00,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90940292] [2023-11-23 21:17:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:17:01,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:01,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90940292] [2023-11-23 21:17:01,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90940292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:01,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:01,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636296023] [2023-11-23 21:17:01,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:01,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:01,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:01,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:01,635 INFO L87 Difference]: Start difference. First operand has 303 states, 192 states have (on average 1.328125) internal successors, (255), 204 states have internal predecessors, (255), 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) [2023-11-23 21:17:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:02,375 INFO L93 Difference]: Finished difference Result 869 states and 1206 transitions. [2023-11-23 21:17:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:02,378 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 [2023-11-23 21:17:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:02,396 INFO L225 Difference]: With dead ends: 869 [2023-11-23 21:17:02,396 INFO L226 Difference]: Without dead ends: 550 [2023-11-23 21:17:02,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:02,408 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 373 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:02,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 677 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:17:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-11-23 21:17:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 547. [2023-11-23 21:17:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 352 states have (on average 1.2698863636363635) internal successors, (447), 361 states have internal predecessors, (447), 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) [2023-11-23 21:17:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 743 transitions. [2023-11-23 21:17:02,600 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 743 transitions. Word has length 33 [2023-11-23 21:17:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:02,601 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 743 transitions. [2023-11-23 21:17:02,601 INFO L496 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) [2023-11-23 21:17:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 743 transitions. [2023-11-23 21:17:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:17:02,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:02,607 INFO L195 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] [2023-11-23 21:17:02,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:02,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:02,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:02,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1457210218, now seen corresponding path program 1 times [2023-11-23 21:17:02,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:02,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450718776] [2023-11-23 21:17:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:02,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:17:02,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:02,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450718776] [2023-11-23 21:17:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450718776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:02,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:02,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:02,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105638867] [2023-11-23 21:17:02,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:02,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:02,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:02,821 INFO L87 Difference]: Start difference. First operand 547 states and 743 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) [2023-11-23 21:17:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:03,531 INFO L93 Difference]: Finished difference Result 1062 states and 1441 transitions. [2023-11-23 21:17:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:03,532 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 [2023-11-23 21:17:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:03,544 INFO L225 Difference]: With dead ends: 1062 [2023-11-23 21:17:03,544 INFO L226 Difference]: Without dead ends: 1056 [2023-11-23 21:17:03,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:03,551 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 359 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:03,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 617 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:17:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2023-11-23 21:17:03,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2023-11-23 21:17:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 681 states have (on average 1.2672540381791484) internal successors, (863), 698 states have internal predecessors, (863), 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) [2023-11-23 21:17:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1431 transitions. [2023-11-23 21:17:03,674 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1431 transitions. Word has length 36 [2023-11-23 21:17:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:03,675 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1431 transitions. [2023-11-23 21:17:03,675 INFO L496 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) [2023-11-23 21:17:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1431 transitions. [2023-11-23 21:17:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:17:03,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:03,691 INFO L195 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] [2023-11-23 21:17:03,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:03,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:03,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash 820413238, now seen corresponding path program 1 times [2023-11-23 21:17:03,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750785109] [2023-11-23 21:17:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:17:03,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:03,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750785109] [2023-11-23 21:17:03,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750785109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:03,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:03,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581083642] [2023-11-23 21:17:03,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:03,963 INFO L87 Difference]: Start difference. First operand 1056 states and 1431 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) [2023-11-23 21:17:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:04,621 INFO L93 Difference]: Finished difference Result 3023 states and 4081 transitions. [2023-11-23 21:17:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:04,623 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 [2023-11-23 21:17:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:04,640 INFO L225 Difference]: With dead ends: 3023 [2023-11-23 21:17:04,640 INFO L226 Difference]: Without dead ends: 1977 [2023-11-23 21:17:04,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:04,647 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 326 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:04,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 626 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:17:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-11-23 21:17:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1972. [2023-11-23 21:17:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1265 states have (on average 1.2608695652173914) internal successors, (1595), 1298 states have internal predecessors, (1595), 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) [2023-11-23 21:17:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2655 transitions. [2023-11-23 21:17:04,791 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2655 transitions. Word has length 83 [2023-11-23 21:17:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:04,795 INFO L495 AbstractCegarLoop]: Abstraction has 1972 states and 2655 transitions. [2023-11-23 21:17:04,796 INFO L496 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) [2023-11-23 21:17:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2655 transitions. [2023-11-23 21:17:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 21:17:04,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:04,805 INFO L195 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] [2023-11-23 21:17:04,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:17:04,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:04,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:04,809 INFO L85 PathProgramCache]: Analyzing trace with hash 256931320, now seen corresponding path program 1 times [2023-11-23 21:17:04,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:04,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974979722] [2023-11-23 21:17:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:04,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:17:05,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974979722] [2023-11-23 21:17:05,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974979722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:05,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:05,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:17:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926201825] [2023-11-23 21:17:05,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:17:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:17:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:17:05,702 INFO L87 Difference]: Start difference. First operand 1972 states and 2655 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) [2023-11-23 21:17:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:06,831 INFO L93 Difference]: Finished difference Result 3021 states and 4106 transitions. [2023-11-23 21:17:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:17:06,832 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 [2023-11-23 21:17:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:06,855 INFO L225 Difference]: With dead ends: 3021 [2023-11-23 21:17:06,855 INFO L226 Difference]: Without dead ends: 1988 [2023-11-23 21:17:06,862 INFO L412 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 [2023-11-23 21:17:06,866 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 0 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:06,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1266 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:17:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2023-11-23 21:17:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1976. [2023-11-23 21:17:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1267 states have (on average 1.260457774269929) internal successors, (1597), 1302 states have internal predecessors, (1597), 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) [2023-11-23 21:17:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 2673 transitions. [2023-11-23 21:17:07,001 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 2673 transitions. Word has length 113 [2023-11-23 21:17:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:07,002 INFO L495 AbstractCegarLoop]: Abstraction has 1976 states and 2673 transitions. [2023-11-23 21:17:07,003 INFO L496 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) [2023-11-23 21:17:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 2673 transitions. [2023-11-23 21:17:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-23 21:17:07,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:07,014 INFO L195 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] [2023-11-23 21:17:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:17:07,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:07,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash 590565163, now seen corresponding path program 1 times [2023-11-23 21:17:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:07,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045269043] [2023-11-23 21:17:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-23 21:17:07,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:07,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045269043] [2023-11-23 21:17:07,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045269043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:17:07,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992900871] [2023-11-23 21:17:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:07,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:07,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:07,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:07,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:17:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:08,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:17:08,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-23 21:17:08,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:08,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992900871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:08,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:17:08,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:17:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005591619] [2023-11-23 21:17:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:17:08,440 INFO L87 Difference]: Start difference. First operand 1976 states and 2673 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) [2023-11-23 21:17:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:09,382 INFO L93 Difference]: Finished difference Result 3942 states and 5336 transitions. [2023-11-23 21:17:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:09,384 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 128 [2023-11-23 21:17:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:09,403 INFO L225 Difference]: With dead ends: 3942 [2023-11-23 21:17:09,403 INFO L226 Difference]: Without dead ends: 1977 [2023-11-23 21:17:09,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:17:09,416 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 0 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:09,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 948 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:17:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-11-23 21:17:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1977. [2023-11-23 21:17:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1268 states have (on average 1.2602523659305993) internal successors, (1598), 1303 states have internal predecessors, (1598), 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) [2023-11-23 21:17:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2674 transitions. [2023-11-23 21:17:09,597 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2674 transitions. Word has length 128 [2023-11-23 21:17:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:09,598 INFO L495 AbstractCegarLoop]: Abstraction has 1977 states and 2674 transitions. [2023-11-23 21:17:09,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-23 21:17:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2674 transitions. [2023-11-23 21:17:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:17:09,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:09,606 INFO L195 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, 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] [2023-11-23 21:17:09,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:09,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:09,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:09,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -417340149, now seen corresponding path program 1 times [2023-11-23 21:17:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:09,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090979543] [2023-11-23 21:17:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-23 21:17:10,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:10,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090979543] [2023-11-23 21:17:10,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090979543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:17:10,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931798297] [2023-11-23 21:17:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:10,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:10,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:10,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:10,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a440c8b7-8a5c-4ef6-b7f4-b4e346e76322/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:17:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:11,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:17:11,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-23 21:17:11,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-23 21:17:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931798297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:11,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065056368] [2023-11-23 21:17:11,714 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-11-23 21:17:11,714 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:17:11,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:17:11,727 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:17:11,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs