./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:17:59,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:17:59,308 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-21 22:17:59,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:17:59,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:17:59,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:17:59,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:17:59,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:17:59,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:17:59,361 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:17:59,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:17:59,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:17:59,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:17:59,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:17:59,365 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:17:59,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:17:59,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:17:59,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:17:59,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:17:59,367 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:17:59,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:17:59,368 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:17:59,369 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:17:59,369 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:17:59,370 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:17:59,370 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:17:59,371 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:17:59,371 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:17:59,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:17:59,372 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:17:59,373 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:17:59,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:17:59,374 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:17:59,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:17:59,374 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:17:59,374 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:17:59,375 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:17:59,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:17:59,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:17:59,388 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2023-11-21 22:17:59,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:17:59,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:17:59,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:17:59,755 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:17:59,755 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:17:59,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2023-11-21 22:18:02,798 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:18:03,402 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:18:03,403 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2023-11-21 22:18:03,459 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/data/88b590390/3f616894aaff40b790e4ab119f15878f/FLAGf511c97f5 [2023-11-21 22:18:03,480 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/data/88b590390/3f616894aaff40b790e4ab119f15878f [2023-11-21 22:18:03,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:18:03,488 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:18:03,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:03,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:18:03,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:18:03,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:03" (1/1) ... [2023-11-21 22:18:03,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369d7a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:03, skipping insertion in model container [2023-11-21 22:18:03,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:03" (1/1) ... [2023-11-21 22:18:03,690 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:18:04,750 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_5f9759ef-9b22-483d-9251-fb64aababe34/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2023-11-21 22:18:05,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:05,361 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:18:05,520 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapl %0": "=r" (val): "0" (val)); [5402] [2023-11-21 22:18:05,525 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5440] [2023-11-21 22:18:05,526 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5447] [2023-11-21 22:18:05,526 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5455-5456] [2023-11-21 22:18:05,532 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [5484] [2023-11-21 22:18:05,532 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0": "+m" (v->counter)); [5491] [2023-11-21 22:18:05,546 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_5f9759ef-9b22-483d-9251-fb64aababe34/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2023-11-21 22:18:05,667 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers--X--defaultlinux-3.12-rc1.tar.xz--X--144_2a--X--cpachecker/linux-3.12-rc1.tar.xz/csd_deg_dscv/6228/dscv_tempdir/dscv/ri/144_2a/drivers/net/can/usb/usb_8dev.o.c.prepared"), "i" (621), "i" (12UL)); [6324-6325] [2023-11-21 22:18:05,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:05,854 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:18:05,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05 WrapperNode [2023-11-21 22:18:05,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:05,856 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:05,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:18:05,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:18:05,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:05,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,036 INFO L138 Inliner]: procedures = 175, calls = 824, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 2502 [2023-11-21 22:18:06,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:06,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:18:06,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:18:06,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:18:06,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,073 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,515 WARN L106 HeapSplitter]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure #Ultimate.C_memcpy is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2023-11-21 22:18:06,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,624 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,731 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:18:06,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:18:06,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:18:06,772 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:18:06,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (1/1) ... [2023-11-21 22:18:06,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:18:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:06,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:18:06,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f9759ef-9b22-483d-9251-fb64aababe34/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:18:06,862 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-21 22:18:06,862 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-21 22:18:06,863 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2023-11-21 22:18:06,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2023-11-21 22:18:06,863 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2023-11-21 22:18:06,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2023-11-21 22:18:06,863 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2023-11-21 22:18:06,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2023-11-21 22:18:06,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 22:18:06,864 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2023-11-21 22:18:06,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2023-11-21 22:18:06,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 22:18:06,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 22:18:06,865 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2023-11-21 22:18:06,865 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2023-11-21 22:18:06,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 22:18:06,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 22:18:06,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:18:06,866 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2023-11-21 22:18:06,867 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2023-11-21 22:18:06,867 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2023-11-21 22:18:06,868 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2023-11-21 22:18:06,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-21 22:18:06,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-21 22:18:06,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-21 22:18:06,869 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-21 22:18:06,869 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-21 22:18:06,869 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-21 22:18:06,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 22:18:06,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 22:18:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-21 22:18:06,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-21 22:18:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2023-11-21 22:18:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2023-11-21 22:18:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-21 22:18:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-21 22:18:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-21 22:18:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-21 22:18:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:18:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 22:18:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 22:18:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 22:18:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 22:18:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 22:18:06,873 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 22:18:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 22:18:06,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 22:18:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-21 22:18:06,873 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-21 22:18:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:18:06,874 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2023-11-21 22:18:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2023-11-21 22:18:06,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-21 22:18:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-21 22:18:06,874 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2023-11-21 22:18:06,874 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2023-11-21 22:18:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:18:06,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-21 22:18:06,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-21 22:18:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:18:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:18:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 22:18:06,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 22:18:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-21 22:18:06,877 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-21 22:18:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-21 22:18:06,878 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-21 22:18:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:18:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2023-11-21 22:18:06,879 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2023-11-21 22:18:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2023-11-21 22:18:06,879 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2023-11-21 22:18:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-21 22:18:06,879 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-21 22:18:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2023-11-21 22:18:06,879 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2023-11-21 22:18:06,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:18:06,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 22:18:06,880 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2023-11-21 22:18:06,880 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2023-11-21 22:18:06,880 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-11-21 22:18:06,880 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-11-21 22:18:06,881 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2023-11-21 22:18:06,881 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2023-11-21 22:18:06,882 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-21 22:18:06,882 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-21 22:18:06,882 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-21 22:18:06,882 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-21 22:18:06,882 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-21 22:18:06,883 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-21 22:18:06,883 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-11-21 22:18:06,883 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-11-21 22:18:06,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-21 22:18:06,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-21 22:18:06,883 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2023-11-21 22:18:06,884 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2023-11-21 22:18:06,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:18:06,884 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2023-11-21 22:18:06,884 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2023-11-21 22:18:06,884 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2023-11-21 22:18:06,884 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2023-11-21 22:18:06,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 22:18:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2023-11-21 22:18:06,885 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2023-11-21 22:18:06,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 22:18:06,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 22:18:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:18:06,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:18:06,886 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2023-11-21 22:18:06,886 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2023-11-21 22:18:07,411 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:18:07,417 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:18:07,611 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 22:18:08,550 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-21 22:18:12,175 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:18:13,279 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:18:13,279 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:18:13,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:13 BoogieIcfgContainer [2023-11-21 22:18:13,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:18:13,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:18:13,284 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:18:13,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:18:13,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:18:03" (1/3) ... [2023-11-21 22:18:13,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6346ab02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:13, skipping insertion in model container [2023-11-21 22:18:13,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:05" (2/3) ... [2023-11-21 22:18:13,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6346ab02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:13, skipping insertion in model container [2023-11-21 22:18:13,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:13" (3/3) ... [2023-11-21 22:18:13,293 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2023-11-21 22:18:13,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:18:13,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:18:13,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:18:13,409 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=PETRI_NET, 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;@30987e48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:18:13,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:18:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 536 states, 334 states have (on average 1.3532934131736527) internal successors, (452), 353 states have internal predecessors, (452), 155 states have call successors, (155), 47 states have call predecessors, (155), 45 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-21 22:18:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:18:13,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:13,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:13,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:13,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash -168201740, now seen corresponding path program 1 times [2023-11-21 22:18:13,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:13,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552858896] [2023-11-21 22:18:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:14,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:18:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:14,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:18:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:18:14,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552858896] [2023-11-21 22:18:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552858896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:14,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:14,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:14,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979612991] [2023-11-21 22:18:14,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:14,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:14,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:14,369 INFO L87 Difference]: Start difference. First operand has 536 states, 334 states have (on average 1.3532934131736527) internal successors, (452), 353 states have internal predecessors, (452), 155 states have call successors, (155), 47 states have call predecessors, (155), 45 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:18:16,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:18:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:21,761 INFO L93 Difference]: Finished difference Result 1670 states and 2398 transitions. [2023-11-21 22:18:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-21 22:18:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:21,810 INFO L225 Difference]: With dead ends: 1670 [2023-11-21 22:18:21,811 INFO L226 Difference]: Without dead ends: 1119 [2023-11-21 22:18:21,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:21,826 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 855 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:21,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1261 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-21 22:18:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2023-11-21 22:18:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1025. [2023-11-21 22:18:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 647 states have (on average 1.3245749613601236) internal successors, (857), 665 states have internal predecessors, (857), 289 states have call successors, (289), 89 states have call predecessors, (289), 88 states have return successors, (284), 282 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-21 22:18:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1430 transitions. [2023-11-21 22:18:22,042 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1430 transitions. Word has length 23 [2023-11-21 22:18:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:22,043 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1430 transitions. [2023-11-21 22:18:22,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:18:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1430 transitions. [2023-11-21 22:18:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:18:22,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:22,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:22,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:18:22,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:22,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash -568837741, now seen corresponding path program 1 times [2023-11-21 22:18:22,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:22,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853977346] [2023-11-21 22:18:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:22,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:22,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:18:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:18:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:18:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:18:22,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:22,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853977346] [2023-11-21 22:18:22,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853977346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:22,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:22,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:22,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634544299] [2023-11-21 22:18:22,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:22,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:22,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:22,662 INFO L87 Difference]: Start difference. First operand 1025 states and 1430 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:28,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:18:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:30,800 INFO L93 Difference]: Finished difference Result 1741 states and 2470 transitions. [2023-11-21 22:18:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-21 22:18:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:30,816 INFO L225 Difference]: With dead ends: 1741 [2023-11-21 22:18:30,816 INFO L226 Difference]: Without dead ends: 1738 [2023-11-21 22:18:30,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:30,819 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 513 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:30,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1224 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-11-21 22:18:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2023-11-21 22:18:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1604. [2023-11-21 22:18:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1016 states have (on average 1.3228346456692914) internal successors, (1344), 1040 states have internal predecessors, (1344), 439 states have call successors, (439), 151 states have call predecessors, (439), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-21 22:18:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2217 transitions. [2023-11-21 22:18:30,999 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2217 transitions. Word has length 32 [2023-11-21 22:18:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:30,999 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2217 transitions. [2023-11-21 22:18:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2217 transitions. [2023-11-21 22:18:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-21 22:18:31,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:31,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:31,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:18:31,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:31,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:31,004 INFO L85 PathProgramCache]: Analyzing trace with hash -454528852, now seen corresponding path program 1 times [2023-11-21 22:18:31,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:31,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931210455] [2023-11-21 22:18:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:31,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:18:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:18:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:18:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:18:31,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:31,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931210455] [2023-11-21 22:18:31,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931210455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:31,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:31,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:31,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725437873] [2023-11-21 22:18:31,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:31,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:31,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:31,433 INFO L87 Difference]: Start difference. First operand 1604 states and 2217 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:37,169 INFO L93 Difference]: Finished difference Result 1726 states and 2452 transitions. [2023-11-21 22:18:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:18:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-21 22:18:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:37,183 INFO L225 Difference]: With dead ends: 1726 [2023-11-21 22:18:37,183 INFO L226 Difference]: Without dead ends: 1723 [2023-11-21 22:18:37,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:37,186 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 734 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:37,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 778 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-21 22:18:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-11-21 22:18:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1603. [2023-11-21 22:18:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1016 states have (on average 1.3218503937007875) internal successors, (1343), 1039 states have internal predecessors, (1343), 438 states have call successors, (438), 151 states have call predecessors, (438), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-21 22:18:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2215 transitions. [2023-11-21 22:18:37,323 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2215 transitions. Word has length 33 [2023-11-21 22:18:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:37,323 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 2215 transitions. [2023-11-21 22:18:37,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2215 transitions. [2023-11-21 22:18:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:18:37,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:37,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:18:37,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:37,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1205915722, now seen corresponding path program 1 times [2023-11-21 22:18:37,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:37,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141730096] [2023-11-21 22:18:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:37,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:37,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:18:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:37,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:18:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:37,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:18:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:18:37,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:37,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141730096] [2023-11-21 22:18:37,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141730096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:37,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:37,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407968571] [2023-11-21 22:18:37,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:37,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:37,623 INFO L87 Difference]: Start difference. First operand 1603 states and 2215 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:43,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:18:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:44,075 INFO L93 Difference]: Finished difference Result 1725 states and 2450 transitions. [2023-11-21 22:18:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:18:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-21 22:18:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:44,090 INFO L225 Difference]: With dead ends: 1725 [2023-11-21 22:18:44,090 INFO L226 Difference]: Without dead ends: 1722 [2023-11-21 22:18:44,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:44,093 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 732 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:44,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 776 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-21 22:18:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2023-11-21 22:18:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1602. [2023-11-21 22:18:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1016 states have (on average 1.3208661417322836) internal successors, (1342), 1038 states have internal predecessors, (1342), 437 states have call successors, (437), 151 states have call predecessors, (437), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-21 22:18:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2213 transitions. [2023-11-21 22:18:44,267 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2213 transitions. Word has length 34 [2023-11-21 22:18:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:44,268 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2213 transitions. [2023-11-21 22:18:44,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2213 transitions. [2023-11-21 22:18:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 22:18:44,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:44,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:44,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:18:44,273 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:44,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1270899951, now seen corresponding path program 1 times [2023-11-21 22:18:44,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:44,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949064029] [2023-11-21 22:18:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:44,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:44,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:18:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:44,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:18:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:44,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:18:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:18:44,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:44,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949064029] [2023-11-21 22:18:44,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949064029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:44,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:44,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:44,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423633337] [2023-11-21 22:18:44,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:44,508 INFO L87 Difference]: Start difference. First operand 1602 states and 2213 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:47,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 22:18:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:49,659 INFO L93 Difference]: Finished difference Result 1724 states and 2448 transitions. [2023-11-21 22:18:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:18:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-21 22:18:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:49,704 INFO L225 Difference]: With dead ends: 1724 [2023-11-21 22:18:49,704 INFO L226 Difference]: Without dead ends: 1721 [2023-11-21 22:18:49,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:49,707 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 734 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:49,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 766 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-21 22:18:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-11-21 22:18:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1601. [2023-11-21 22:18:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1016 states have (on average 1.3198818897637796) internal successors, (1341), 1037 states have internal predecessors, (1341), 436 states have call successors, (436), 151 states have call predecessors, (436), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-21 22:18:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2211 transitions. [2023-11-21 22:18:49,856 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2211 transitions. Word has length 35 [2023-11-21 22:18:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:49,857 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 2211 transitions. [2023-11-21 22:18:49,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:18:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2211 transitions. [2023-11-21 22:18:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 22:18:49,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:49,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:49,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:18:49,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:49,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash 742779353, now seen corresponding path program 1 times [2023-11-21 22:18:49,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:49,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469345229] [2023-11-21 22:18:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:50,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:18:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:50,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:18:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:18:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:18:50,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469345229] [2023-11-21 22:18:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469345229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:50,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:50,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521813055] [2023-11-21 22:18:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:50,114 INFO L87 Difference]: Start difference. First operand 1601 states and 2211 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)