./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e621fe5569ce23da8663d1ba84e0ea76474750cbbbe06c56ff4e5d6732ec9411 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:00:47,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:00:47,804 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:00:47,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:00:47,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:00:47,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:00:47,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:00:47,842 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:00:47,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:00:47,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:00:47,844 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:00:47,844 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:00:47,845 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:00:47,845 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:00:47,846 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:00:47,847 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:00:47,847 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:00:47,848 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:00:47,848 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:00:47,849 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:00:47,849 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:00:47,854 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:00:47,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:00:47,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:00:47,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:00:47,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:00:47,859 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:00:47,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:00:47,860 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:00:47,860 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:00:47,861 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:00:47,861 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:00:47,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:00:47,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:00:47,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:47,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:00:47,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:00:47,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:00:47,865 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:00:47,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:00:47,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:00:47,872 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:00:47,872 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:00:47,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:00:47,873 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_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e621fe5569ce23da8663d1ba84e0ea76474750cbbbe06c56ff4e5d6732ec9411 [2023-11-25 00:00:48,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:00:48,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:00:48,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:00:48,170 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:00:48,171 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:00:48,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i [2023-11-25 00:00:51,355 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:00:51,865 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:00:51,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i [2023-11-25 00:00:51,906 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/data/2cb3044ac/81bf168ea794459fa5825c8e53def311/FLAG6071f3f6d [2023-11-25 00:00:51,924 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/data/2cb3044ac/81bf168ea794459fa5825c8e53def311 [2023-11-25 00:00:51,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:00:51,934 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:00:51,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:51,938 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:00:51,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:00:51,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:51" (1/1) ... [2023-11-25 00:00:51,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3b141e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:51, skipping insertion in model container [2023-11-25 00:00:51,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:51" (1/1) ... [2023-11-25 00:00:52,059 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:00:52,959 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_632d7971-262b-4b6b-bf52-20da94dbd0db/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i[100586,100599] [2023-11-25 00:00:53,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:53,304 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:00:53,416 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] [2023-11-25 00:00:53,459 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_632d7971-262b-4b6b-bf52-20da94dbd0db/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i[100586,100599] [2023-11-25 00:00:53,463 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)); [3611-3612] [2023-11-25 00:00:53,464 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)); [3619-3620] [2023-11-25 00:00:53,465 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)); [3627-3628] [2023-11-25 00:00:53,551 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/gratinskiy/commit-tester-runs/6-cpa-svcomp-newdeg/commit-tester-work/task-011--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.o.c.prepared"), "i" (151), "i" (12UL)); [3842-3843] [2023-11-25 00:00:53,571 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/gratinskiy/commit-tester-runs/6-cpa-svcomp-newdeg/commit-tester-work/task-011--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.o.c.prepared"), "i" (205), "i" (12UL)); [3917-3918] [2023-11-25 00:00:53,651 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/gratinskiy/commit-tester-runs/6-cpa-svcomp-newdeg/commit-tester-work/task-011--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.o.c.prepared"), "i" (495), "i" (12UL)); [4238-4239] [2023-11-25 00:00:53,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:53,750 WARN L675 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:00:53,751 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:00:53,758 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:00:53,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53 WrapperNode [2023-11-25 00:00:53,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:53,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:53,761 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:00:53,761 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:00:53,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:53,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:53,992 INFO L138 Inliner]: procedures = 155, calls = 555, calls flagged for inlining = 94, calls inlined = 94, statements flattened = 1969 [2023-11-25 00:00:53,993 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:53,994 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:00:53,994 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:00:53,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:00:54,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,177 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,203 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:00:54,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:00:54,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:00:54,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:00:54,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (1/1) ... [2023-11-25 00:00:54,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:54,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:54,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:00:54,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:00:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_max_segment_size [2023-11-25 00:00:54,327 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_max_segment_size [2023-11-25 00:00:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure virtio_config_buf [2023-11-25 00:00:54,327 INFO L138 BoogieDeclarations]: Found implementation of procedure virtio_config_buf [2023-11-25 00:00:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-25 00:00:54,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-25 00:00:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:00:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure req_get_ioprio [2023-11-25 00:00:54,328 INFO L138 BoogieDeclarations]: Found implementation of procedure req_get_ioprio [2023-11-25 00:00:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2023-11-25 00:00:54,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2023-11-25 00:00:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-25 00:00:54,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-25 00:00:54,329 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_free [2023-11-25 00:00:54,330 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_free [2023-11-25 00:00:54,330 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_buf [2023-11-25 00:00:54,330 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_buf [2023-11-25 00:00:54,330 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-25 00:00:54,330 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-25 00:00:54,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:00:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-25 00:00:54,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-25 00:00:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-25 00:00:54,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-25 00:00:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure index_to_minor [2023-11-25 00:00:54,336 INFO L138 BoogieDeclarations]: Found implementation of procedure index_to_minor [2023-11-25 00:00:54,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:00:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:00:54,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:00:54,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-25 00:00:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-25 00:00:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-25 00:00:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-25 00:00:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-25 00:00:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:00:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure virtio_has_feature [2023-11-25 00:00:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure virtio_has_feature [2023-11-25 00:00:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:00:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:00:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-25 00:00:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-25 00:00:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-25 00:00:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure virtblk_remove [2023-11-25 00:00:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure virtblk_remove [2023-11-25 00:00:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_destroy [2023-11-25 00:00:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure mempool_destroy [2023-11-25 00:00:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:00:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-25 00:00:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-25 00:00:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2023-11-25 00:00:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2023-11-25 00:00:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-25 00:00:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-25 00:00:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:00:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:00:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-25 00:00:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-25 00:00:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2023-11-25 00:00:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2023-11-25 00:00:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_ordered [2023-11-25 00:00:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_ordered [2023-11-25 00:00:54,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:00:54,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-25 00:00:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-25 00:00:54,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:00:54,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:00:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-25 00:00:54,350 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-25 00:00:54,760 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:00:54,763 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:00:55,306 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-25 00:00:55,367 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-25 00:00:56,175 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:00:57,110 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:00:57,110 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-25 00:00:57,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:57 BoogieIcfgContainer [2023-11-25 00:00:57,112 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:00:57,115 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:00:57,115 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:00:57,119 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:00:57,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:00:51" (1/3) ... [2023-11-25 00:00:57,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a567cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:57, skipping insertion in model container [2023-11-25 00:00:57,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:53" (2/3) ... [2023-11-25 00:00:57,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a567cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:57, skipping insertion in model container [2023-11-25 00:00:57,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:57" (3/3) ... [2023-11-25 00:00:57,122 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i [2023-11-25 00:00:57,142 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:00:57,143 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:00:57,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:00:57,208 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;@24fa0a17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:00:57,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:00:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 210 states have (on average 1.3428571428571427) internal successors, (282), 223 states have internal predecessors, (282), 88 states have call successors, (88), 27 states have call predecessors, (88), 25 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-25 00:00:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-25 00:00:57,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:57,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:57,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:57,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash 580399605, now seen corresponding path program 1 times [2023-11-25 00:00:57,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:57,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146540301] [2023-11-25 00:00:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:57,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:57,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146540301] [2023-11-25 00:00:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146540301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:57,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:57,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:57,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518124424] [2023-11-25 00:00:57,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:57,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:57,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:57,706 INFO L87 Difference]: Start difference. First operand has 325 states, 210 states have (on average 1.3428571428571427) internal successors, (282), 223 states have internal predecessors, (282), 88 states have call successors, (88), 27 states have call predecessors, (88), 25 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:00:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:58,654 INFO L93 Difference]: Finished difference Result 900 states and 1255 transitions. [2023-11-25 00:00:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-25 00:00:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:58,687 INFO L225 Difference]: With dead ends: 900 [2023-11-25 00:00:58,688 INFO L226 Difference]: Without dead ends: 551 [2023-11-25 00:00:58,698 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 [2023-11-25 00:00:58,706 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 377 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:58,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 682 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:00:58,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-25 00:00:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 548. [2023-11-25 00:00:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 356 states have (on average 1.2696629213483146) internal successors, (452), 365 states have internal predecessors, (452), 148 states have call successors, (148), 44 states have call predecessors, (148), 43 states have return successors, (146), 146 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-25 00:00:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 746 transitions. [2023-11-25 00:00:58,860 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 746 transitions. Word has length 18 [2023-11-25 00:00:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:58,861 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 746 transitions. [2023-11-25 00:00:58,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:00:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 746 transitions. [2023-11-25 00:00:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:00:58,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:58,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:58,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:00:58,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:58,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1973144256, now seen corresponding path program 1 times [2023-11-25 00:00:58,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986616011] [2023-11-25 00:00:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:59,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986616011] [2023-11-25 00:00:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986616011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:59,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:59,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:59,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903485122] [2023-11-25 00:00:59,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:59,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:59,053 INFO L87 Difference]: Start difference. First operand 548 states and 746 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:00:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:59,708 INFO L93 Difference]: Finished difference Result 1070 states and 1454 transitions. [2023-11-25 00:00:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-25 00:00:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:59,720 INFO L225 Difference]: With dead ends: 1070 [2023-11-25 00:00:59,721 INFO L226 Difference]: Without dead ends: 1064 [2023-11-25 00:00:59,722 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 [2023-11-25 00:00:59,728 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 362 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:59,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 626 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:00:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-11-25 00:00:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1064. [2023-11-25 00:00:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 692 states have (on average 1.2658959537572254) internal successors, (876), 709 states have internal predecessors, (876), 285 states have call successors, (285), 87 states have call predecessors, (285), 86 states have return successors, (283), 283 states have call predecessors, (283), 283 states have call successors, (283) [2023-11-25 00:00:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1444 transitions. [2023-11-25 00:00:59,833 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1444 transitions. Word has length 21 [2023-11-25 00:00:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:59,833 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1444 transitions. [2023-11-25 00:00:59,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-25 00:00:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1444 transitions. [2023-11-25 00:00:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-25 00:00:59,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:59,848 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:00:59,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:00:59,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:59,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -234590522, now seen corresponding path program 1 times [2023-11-25 00:00:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133182556] [2023-11-25 00:00:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:01:00,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133182556] [2023-11-25 00:01:00,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133182556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:00,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:00,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:00,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396092646] [2023-11-25 00:01:00,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:00,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:00,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:00,099 INFO L87 Difference]: Start difference. First operand 1064 states and 1444 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:01:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:00,814 INFO L93 Difference]: Finished difference Result 3058 states and 4130 transitions. [2023-11-25 00:01:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2023-11-25 00:01:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:00,832 INFO L225 Difference]: With dead ends: 3058 [2023-11-25 00:01:00,832 INFO L226 Difference]: Without dead ends: 1998 [2023-11-25 00:01:00,838 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 [2023-11-25 00:01:00,839 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 326 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:00,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 638 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:01:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2023-11-25 00:01:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1993. [2023-11-25 00:01:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1289 states have (on average 1.2583397982932505) internal successors, (1622), 1322 states have internal predecessors, (1622), 532 states have call successors, (532), 172 states have call predecessors, (532), 171 states have return successors, (530), 530 states have call predecessors, (530), 530 states have call successors, (530) [2023-11-25 00:01:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2684 transitions. [2023-11-25 00:01:00,971 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2684 transitions. Word has length 68 [2023-11-25 00:01:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:00,971 INFO L495 AbstractCegarLoop]: Abstraction has 1993 states and 2684 transitions. [2023-11-25 00:01:00,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:01:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2684 transitions. [2023-11-25 00:01:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-25 00:01:00,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:00,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-11-25 00:01:00,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:01:00,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:00,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1408841922, now seen corresponding path program 1 times [2023-11-25 00:01:00,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:00,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626830331] [2023-11-25 00:01:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:00,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-25 00:01:01,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:01,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626830331] [2023-11-25 00:01:01,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626830331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:01,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:01,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:01:01,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423896995] [2023-11-25 00:01:01,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:01,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:01:01,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:01,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:01:01,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:01:01,608 INFO L87 Difference]: Start difference. First operand 1993 states and 2684 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-25 00:01:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:02,544 INFO L93 Difference]: Finished difference Result 3047 states and 4143 transitions. [2023-11-25 00:01:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:01:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2023-11-25 00:01:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:02,567 INFO L225 Difference]: With dead ends: 3047 [2023-11-25 00:01:02,568 INFO L226 Difference]: Without dead ends: 2009 [2023-11-25 00:01:02,576 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 [2023-11-25 00:01:02,578 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 0 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:02,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1270 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:01:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2023-11-25 00:01:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1997. [2023-11-25 00:01:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1291 states have (on average 1.2579395817195973) internal successors, (1624), 1326 states have internal predecessors, (1624), 532 states have call successors, (532), 172 states have call predecessors, (532), 173 states have return successors, (546), 530 states have call predecessors, (546), 530 states have call successors, (546) [2023-11-25 00:01:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 2702 transitions. [2023-11-25 00:01:02,717 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 2702 transitions. Word has length 86 [2023-11-25 00:01:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:02,718 INFO L495 AbstractCegarLoop]: Abstraction has 1997 states and 2702 transitions. [2023-11-25 00:01:02,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-25 00:01:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 2702 transitions. [2023-11-25 00:01:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-25 00:01:02,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:02,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-11-25 00:01:02,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:01:02,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:02,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:02,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2134073293, now seen corresponding path program 1 times [2023-11-25 00:01:02,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:02,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465177578] [2023-11-25 00:01:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:02,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-25 00:01:03,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465177578] [2023-11-25 00:01:03,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465177578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:03,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:03,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:03,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173289604] [2023-11-25 00:01:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:03,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:03,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:03,080 INFO L87 Difference]: Start difference. First operand 1997 states and 2702 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-25 00:01:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:03,703 INFO L93 Difference]: Finished difference Result 3982 states and 5388 transitions. [2023-11-25 00:01:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 97 [2023-11-25 00:01:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:03,720 INFO L225 Difference]: With dead ends: 3982 [2023-11-25 00:01:03,720 INFO L226 Difference]: Without dead ends: 1998 [2023-11-25 00:01:03,729 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 [2023-11-25 00:01:03,730 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 0 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:03,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 638 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2023-11-25 00:01:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1998. [2023-11-25 00:01:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1292 states have (on average 1.2577399380804954) internal successors, (1625), 1327 states have internal predecessors, (1625), 532 states have call successors, (532), 172 states have call predecessors, (532), 173 states have return successors, (546), 530 states have call predecessors, (546), 530 states have call successors, (546) [2023-11-25 00:01:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 2703 transitions. [2023-11-25 00:01:03,849 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 2703 transitions. Word has length 97 [2023-11-25 00:01:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:03,850 INFO L495 AbstractCegarLoop]: Abstraction has 1998 states and 2703 transitions. [2023-11-25 00:01:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-25 00:01:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 2703 transitions. [2023-11-25 00:01:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-25 00:01:03,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:03,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-11-25 00:01:03,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:01:03,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:03,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1225212753, now seen corresponding path program 1 times [2023-11-25 00:01:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:03,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812558788] [2023-11-25 00:01:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-25 00:01:04,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:04,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812558788] [2023-11-25 00:01:04,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812558788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:04,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109208512] [2023-11-25 00:01:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:04,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:04,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:04,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_632d7971-262b-4b6b-bf52-20da94dbd0db/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:01:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:04,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:01:05,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-25 00:01:05,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:01:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-25 00:01:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109208512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:01:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344526523] [2023-11-25 00:01:05,204 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-11-25 00:01:05,204 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:01:05,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:01:05,214 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:01:05,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs