./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:17:15,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:17:15,735 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:17:15,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:17:15,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:17:15,769 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:17:15,770 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:17:15,771 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:17:15,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:17:15,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:17:15,782 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:17:15,783 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:17:15,784 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:17:15,789 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:17:15,790 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:17:15,790 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:17:15,792 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:17:15,792 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:17:15,793 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:17:15,793 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:17:15,794 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:17:15,795 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:17:15,796 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:17:15,796 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:17:15,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:17:15,797 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:17:15,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:17:15,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:17:15,798 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:17:15,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:17:15,818 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:17:15,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:17:15,819 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:17:15,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:17:15,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:15,820 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:17:15,820 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:17:15,820 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:17:15,821 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:17:15,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:17:15,821 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:17:15,822 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:17:15,822 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:17:15,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:17:15,823 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_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 [2023-11-23 21:17:16,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:16,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:16,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:16,201 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:16,202 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:16,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2023-11-23 21:17:19,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:19,955 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:19,956 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2023-11-23 21:17:20,011 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/data/92a232259/cfd9e10315e04f398762daef36bdbb65/FLAG85dc3437b [2023-11-23 21:17:20,031 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/data/92a232259/cfd9e10315e04f398762daef36bdbb65 [2023-11-23 21:17:20,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:20,041 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:20,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:20,047 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:20,053 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:20,054 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:20" (1/1) ... [2023-11-23 21:17:20,055 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95e8498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:20, skipping insertion in model container [2023-11-23 21:17:20,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:20" (1/1) ... [2023-11-23 21:17:20,180 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:21,364 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_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2023-11-23 21:17:21,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:21,954 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:22,312 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"); [5277] [2023-11-23 21:17:22,330 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)); [5284] [2023-11-23 21:17:22,331 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 %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [5292-5293] [2023-11-23 21:17:22,332 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, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [5301-5302] [2023-11-23 21:17:22,336 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)); [5349] [2023-11-23 21:17:22,337 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; sete %1": "+m" (v->counter), "=qm" (c): : "memory"); [5357-5358] [2023-11-23 21:17:22,363 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_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2023-11-23 21:17:22,399 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu): "0" (__pu_val), "c" (p): "ebx"); [5939] [2023-11-23 21:17:22,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu): "0" (__pu_val), "c" (p): "ebx"); [5942] [2023-11-23 21:17:22,402 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu): "0" (__pu_val), "c" (p): "ebx"); [5945] [2023-11-23 21:17:22,402 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu): "0" (__pu_val), "c" (p): "ebx"); [5948] [2023-11-23 21:17:22,402 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu): "0" (__pu_val), "c" (p): "ebx"); [5951] [2023-11-23 21:17:22,404 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [5967-5968] [2023-11-23 21:17:22,405 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [5971-5972] [2023-11-23 21:17:22,405 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [5975-5976] [2023-11-23 21:17:22,405 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [5979-5980] [2023-11-23 21:17:22,406 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [5983-5984] [2023-11-23 21:17:22,407 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6007-6008] [2023-11-23 21:17:22,408 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6011-6012] [2023-11-23 21:17:22,408 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6015-6016] [2023-11-23 21:17:22,409 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6019-6020] [2023-11-23 21:17:22,409 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6023-6024] [2023-11-23 21:17:22,423 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)argp): "ebx"); [6152] [2023-11-23 21:17:22,424 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)argp): "ebx"); [6155] [2023-11-23 21:17:22,424 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)argp): "ebx"); [6158] [2023-11-23 21:17:22,425 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)argp): "ebx"); [6161] [2023-11-23 21:17:22,425 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu): "0" (__pu_val), "c" ((int *)argp): "ebx"); [6164] [2023-11-23 21:17:22,427 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" ((int *)argp), "i" (4UL)); [6176-6177] [2023-11-23 21:17:22,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [6194-6195] [2023-11-23 21:17:22,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [6198-6199] [2023-11-23 21:17:22,430 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [6202-6203] [2023-11-23 21:17:22,430 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [6206-6207] [2023-11-23 21:17:22,431 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (p): "ebx"); [6210-6211] [2023-11-23 21:17:22,432 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu___0), "=r" (__val_gu___0): "0" (p), "i" (4UL)); [6223-6224] [2023-11-23 21:17:22,433 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6237-6238] [2023-11-23 21:17:22,434 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6241-6242] [2023-11-23 21:17:22,434 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6245-6246] [2023-11-23 21:17:22,435 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6249-6250] [2023-11-23 21:17:22,435 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (p): "ebx"); [6253-6254] [2023-11-23 21:17:22,437 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu___1), "=r" (__val_gu___1): "0" (p), "i" (4UL)); [6266-6267] [2023-11-23 21:17:22,441 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___2): "0" (__pu_val___2), "c" ((int *)argp): "ebx"); [6304-6305] [2023-11-23 21:17:22,442 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___2): "0" (__pu_val___2), "c" ((int *)argp): "ebx"); [6308-6309] [2023-11-23 21:17:22,444 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___2): "0" (__pu_val___2), "c" ((int *)argp): "ebx"); [6312-6313] [2023-11-23 21:17:22,445 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___2): "0" (__pu_val___2), "c" ((int *)argp): "ebx"); [6316-6317] [2023-11-23 21:17:22,446 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___2): "0" (__pu_val___2), "c" ((int *)argp): "ebx"); [6320-6321] [2023-11-23 21:17:22,446 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu___2), "=r" (__val_gu___2): "0" ((int *)argp), "i" (4UL)); [6333-6334] [2023-11-23 21:17:22,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:22,627 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:22,628 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22 WrapperNode [2023-11-23 21:17:22,628 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:22,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:22,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:22,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:22,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:22,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:22,858 INFO L138 Inliner]: procedures = 176, calls = 460, calls flagged for inlining = 92, calls inlined = 85, statements flattened = 1885 [2023-11-23 21:17:22,859 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:22,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:22,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:22,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:22,871 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:22,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:22,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:22,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:22,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:23,011 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:23,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:23,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:23,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:23,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:23,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:23,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:23,073 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (1/1) ... [2023-11-23 21:17:23,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:23,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:23,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:23,160 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 21:17:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 21:17:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_15 [2023-11-23 21:17:23,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_15 [2023-11-23 21:17:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_poll [2023-11-23 21:17:23,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_poll [2023-11-23 21:17:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:17:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2023-11-23 21:17:23,161 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2023-11-23 21:17:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:17:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:17:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:17:23,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:17:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:17:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2023-11-23 21:17:23,163 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2023-11-23 21:17:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2023-11-23 21:17:23,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2023-11-23 21:17:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:17:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:17:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2023-11-23 21:17:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2023-11-23 21:17:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:17:23,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:17:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure spin_trylock_bh [2023-11-23 21:17:23,166 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_trylock_bh [2023-11-23 21:17:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-23 21:17:23,166 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-23 21:17:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2023-11-23 21:17:23,167 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2023-11-23 21:17:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2023-11-23 21:17:23,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2023-11-23 21:17:23,168 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_synctty_ioctl [2023-11-23 21:17:23,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_synctty_ioctl [2023-11-23 21:17:23,168 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:17:23,168 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:17:23,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:17:23,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:17:23,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:17:23,169 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2023-11-23 21:17:23,169 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2023-11-23 21:17:23,170 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_close [2023-11-23 21:17:23,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_close [2023-11-23 21:17:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:17:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:17:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-11-23 21:17:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-11-23 21:17:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_print_buffer [2023-11-23 21:17:23,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_print_buffer [2023-11-23 21:17:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:17:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:17:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:17:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-11-23 21:17:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-11-23 21:17:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:17:23,172 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:17:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:17:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:17:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2023-11-23 21:17:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2023-11-23 21:17:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2023-11-23 21:17:23,173 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2023-11-23 21:17:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:17:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2023-11-23 21:17:23,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2023-11-23 21:17:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2023-11-23 21:17:23,175 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2023-11-23 21:17:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure sp_put [2023-11-23 21:17:23,175 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_put [2023-11-23 21:17:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:17:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:17:23,176 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2023-11-23 21:17:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2023-11-23 21:17:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_hangup [2023-11-23 21:17:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_hangup [2023-11-23 21:17:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 21:17:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 21:17:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:17:23,178 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:17:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-11-23 21:17:23,178 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-11-23 21:17:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure sp_get [2023-11-23 21:17:23,179 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_get [2023-11-23 21:17:23,180 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-23 21:17:23,180 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-23 21:17:23,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:17:23,180 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2023-11-23 21:17:23,180 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2023-11-23 21:17:23,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:17:23,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:17:23,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:17:23,182 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 21:17:23,182 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 21:17:23,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:23,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:23,183 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_push [2023-11-23 21:17:23,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_push [2023-11-23 21:17:23,753 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:23,757 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:23,852 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:17:25,599 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:26,384 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:26,385 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:17:26,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:26 BoogieIcfgContainer [2023-11-23 21:17:26,387 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:26,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:26,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:26,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:26,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:20" (1/3) ... [2023-11-23 21:17:26,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60014f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:26, skipping insertion in model container [2023-11-23 21:17:26,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:22" (2/3) ... [2023-11-23 21:17:26,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60014f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:26, skipping insertion in model container [2023-11-23 21:17:26,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:26" (3/3) ... [2023-11-23 21:17:26,398 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2023-11-23 21:17:26,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:26,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:26,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:26,504 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;@44e44d23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:26,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 462 states, 296 states have (on average 1.3885135135135136) internal successors, (411), 312 states have internal predecessors, (411), 124 states have call successors, (124), 41 states have call predecessors, (124), 40 states have return successors, (120), 118 states have call predecessors, (120), 120 states have call successors, (120) [2023-11-23 21:17:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:17:26,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:26,537 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:26,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:26,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash 88994742, now seen corresponding path program 1 times [2023-11-23 21:17:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:26,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661588624] [2023-11-23 21:17:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:26,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:17:27,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661588624] [2023-11-23 21:17:27,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661588624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:27,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:27,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349095443] [2023-11-23 21:17:27,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:27,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:27,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:27,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:27,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:27,302 INFO L87 Difference]: Start difference. First operand has 462 states, 296 states have (on average 1.3885135135135136) internal successors, (411), 312 states have internal predecessors, (411), 124 states have call successors, (124), 41 states have call predecessors, (124), 40 states have return successors, (120), 118 states have call predecessors, (120), 120 states have call successors, (120) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-23 21:17:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:29,068 INFO L93 Difference]: Finished difference Result 1322 states and 1913 transitions. [2023-11-23 21:17:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 73 [2023-11-23 21:17:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:29,119 INFO L225 Difference]: With dead ends: 1322 [2023-11-23 21:17:29,119 INFO L226 Difference]: Without dead ends: 869 [2023-11-23 21:17:29,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:29,143 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 591 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:29,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1111 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:17:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-11-23 21:17:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2023-11-23 21:17:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 565 states have (on average 1.3646017699115045) internal successors, (771), 585 states have internal predecessors, (771), 225 states have call successors, (225), 79 states have call predecessors, (225), 78 states have return successors, (224), 220 states have call predecessors, (224), 224 states have call successors, (224) [2023-11-23 21:17:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1220 transitions. [2023-11-23 21:17:29,320 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1220 transitions. Word has length 73 [2023-11-23 21:17:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:29,321 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1220 transitions. [2023-11-23 21:17:29,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-23 21:17:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1220 transitions. [2023-11-23 21:17:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 21:17:29,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:29,329 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:29,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:29,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:29,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash -849498968, now seen corresponding path program 1 times [2023-11-23 21:17:29,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:29,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391195862] [2023-11-23 21:17:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:29,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:17:29,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391195862] [2023-11-23 21:17:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391195862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:29,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:29,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:17:29,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776687336] [2023-11-23 21:17:29,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:29,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:17:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:17:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:17:29,773 INFO L87 Difference]: Start difference. First operand 869 states and 1220 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-23 21:17:31,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:32,952 INFO L93 Difference]: Finished difference Result 1717 states and 2447 transitions. [2023-11-23 21:17:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:17:32,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 76 [2023-11-23 21:17:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:32,988 INFO L225 Difference]: With dead ends: 1717 [2023-11-23 21:17:32,989 INFO L226 Difference]: Without dead ends: 1708 [2023-11-23 21:17:32,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:17:33,001 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 621 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:33,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1706 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 21:17:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2023-11-23 21:17:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1700. [2023-11-23 21:17:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1105 states have (on average 1.367420814479638) internal successors, (1511), 1145 states have internal predecessors, (1511), 438 states have call successors, (438), 157 states have call predecessors, (438), 156 states have return successors, (475), 429 states have call predecessors, (475), 437 states have call successors, (475) [2023-11-23 21:17:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2424 transitions. [2023-11-23 21:17:33,204 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2424 transitions. Word has length 76 [2023-11-23 21:17:33,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:33,207 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2424 transitions. [2023-11-23 21:17:33,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-23 21:17:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2424 transitions. [2023-11-23 21:17:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 21:17:33,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:33,229 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:33,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:33,230 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:33,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:33,231 INFO L85 PathProgramCache]: Analyzing trace with hash 841615148, now seen corresponding path program 1 times [2023-11-23 21:17:33,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:33,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761671376] [2023-11-23 21:17:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:33,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:17:33,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:33,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761671376] [2023-11-23 21:17:33,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761671376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600595357] [2023-11-23 21:17:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:33,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:33,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:33,507 INFO L87 Difference]: Start difference. First operand 1700 states and 2424 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:17:35,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:35,844 INFO L93 Difference]: Finished difference Result 4340 states and 6129 transitions. [2023-11-23 21:17:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2023-11-23 21:17:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:35,890 INFO L225 Difference]: With dead ends: 4340 [2023-11-23 21:17:35,891 INFO L226 Difference]: Without dead ends: 2661 [2023-11-23 21:17:35,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:35,906 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 367 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:35,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1047 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:17:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2023-11-23 21:17:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 2652. [2023-11-23 21:17:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1744 states have (on average 1.3572247706422018) internal successors, (2367), 1791 states have internal predecessors, (2367), 651 states have call successors, (651), 257 states have call predecessors, (651), 256 states have return successors, (706), 639 states have call predecessors, (706), 650 states have call successors, (706) [2023-11-23 21:17:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3724 transitions. [2023-11-23 21:17:36,147 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3724 transitions. Word has length 113 [2023-11-23 21:17:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:36,149 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 3724 transitions. [2023-11-23 21:17:36,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:17:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3724 transitions. [2023-11-23 21:17:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:17:36,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:36,165 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:36,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:17:36,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:36,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1958927976, now seen corresponding path program 1 times [2023-11-23 21:17:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052216778] [2023-11-23 21:17:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:17:36,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052216778] [2023-11-23 21:17:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052216778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:36,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:36,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608638537] [2023-11-23 21:17:36,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:36,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:36,439 INFO L87 Difference]: Start difference. First operand 2652 states and 3724 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:17:38,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:38,939 INFO L93 Difference]: Finished difference Result 6480 states and 9056 transitions. [2023-11-23 21:17:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2023-11-23 21:17:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:38,980 INFO L225 Difference]: With dead ends: 6480 [2023-11-23 21:17:38,980 INFO L226 Difference]: Without dead ends: 3849 [2023-11-23 21:17:38,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:38,992 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 413 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:38,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1290 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 21:17:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2023-11-23 21:17:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3842. [2023-11-23 21:17:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3842 states, 2538 states have (on average 1.3624901497241924) internal successors, (3458), 2623 states have internal predecessors, (3458), 906 states have call successors, (906), 398 states have call predecessors, (906), 397 states have return successors, (985), 884 states have call predecessors, (985), 905 states have call successors, (985) [2023-11-23 21:17:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3842 states to 3842 states and 5349 transitions. [2023-11-23 21:17:39,263 INFO L78 Accepts]: Start accepts. Automaton has 3842 states and 5349 transitions. Word has length 130 [2023-11-23 21:17:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:39,264 INFO L495 AbstractCegarLoop]: Abstraction has 3842 states and 5349 transitions. [2023-11-23 21:17:39,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:17:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3842 states and 5349 transitions. [2023-11-23 21:17:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-23 21:17:39,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:39,322 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:39,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:17:39,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:39,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -823215181, now seen corresponding path program 1 times [2023-11-23 21:17:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:39,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67433069] [2023-11-23 21:17:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-23 21:17:39,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:39,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67433069] [2023-11-23 21:17:39,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67433069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:39,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:39,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:39,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601709564] [2023-11-23 21:17:39,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:39,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:39,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:39,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:39,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:39,493 INFO L87 Difference]: Start difference. First operand 3842 states and 5349 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:17:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:40,851 INFO L93 Difference]: Finished difference Result 9434 states and 13092 transitions. [2023-11-23 21:17:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:40,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 133 [2023-11-23 21:17:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:40,900 INFO L225 Difference]: With dead ends: 9434 [2023-11-23 21:17:40,901 INFO L226 Difference]: Without dead ends: 5621 [2023-11-23 21:17:40,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:40,917 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 467 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:40,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 1079 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:17:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2023-11-23 21:17:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 5608. [2023-11-23 21:17:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 3759 states have (on average 1.3535514764565044) internal successors, (5088), 3867 states have internal predecessors, (5088), 1241 states have call successors, (1241), 608 states have call predecessors, (1241), 607 states have return successors, (1352), 1216 states have call predecessors, (1352), 1240 states have call successors, (1352) [2023-11-23 21:17:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 7681 transitions. [2023-11-23 21:17:41,358 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 7681 transitions. Word has length 133 [2023-11-23 21:17:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:41,360 INFO L495 AbstractCegarLoop]: Abstraction has 5608 states and 7681 transitions. [2023-11-23 21:17:41,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:17:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 7681 transitions. [2023-11-23 21:17:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 21:17:41,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:41,377 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:41,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:17:41,378 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:41,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1632836241, now seen corresponding path program 1 times [2023-11-23 21:17:41,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:41,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087634210] [2023-11-23 21:17:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:41,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-11-23 21:17:41,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087634210] [2023-11-23 21:17:41,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087634210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:41,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:41,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988255464] [2023-11-23 21:17:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:41,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:41,588 INFO L87 Difference]: Start difference. First operand 5608 states and 7681 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:17:44,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:44,275 INFO L93 Difference]: Finished difference Result 8466 states and 11730 transitions. [2023-11-23 21:17:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:44,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 137 [2023-11-23 21:17:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:44,338 INFO L225 Difference]: With dead ends: 8466 [2023-11-23 21:17:44,339 INFO L226 Difference]: Without dead ends: 5648 [2023-11-23 21:17:44,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:44,356 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 4 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:44,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1092 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:17:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2023-11-23 21:17:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5648. [2023-11-23 21:17:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5648 states, 3789 states have (on average 1.3507521773555027) internal successors, (5118), 3907 states have internal predecessors, (5118), 1241 states have call successors, (1241), 608 states have call predecessors, (1241), 617 states have return successors, (1362), 1216 states have call predecessors, (1362), 1240 states have call successors, (1362) [2023-11-23 21:17:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5648 states to 5648 states and 7721 transitions. [2023-11-23 21:17:44,736 INFO L78 Accepts]: Start accepts. Automaton has 5648 states and 7721 transitions. Word has length 137 [2023-11-23 21:17:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:44,737 INFO L495 AbstractCegarLoop]: Abstraction has 5648 states and 7721 transitions. [2023-11-23 21:17:44,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:17:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5648 states and 7721 transitions. [2023-11-23 21:17:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-23 21:17:44,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:44,753 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:17:44,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:44,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 539429627, now seen corresponding path program 1 times [2023-11-23 21:17:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108610480] [2023-11-23 21:17:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-11-23 21:17:45,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:45,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108610480] [2023-11-23 21:17:45,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108610480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:45,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:45,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:17:45,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301555596] [2023-11-23 21:17:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:45,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:17:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:17:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:17:45,403 INFO L87 Difference]: Start difference. First operand 5648 states and 7721 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 21:17:51,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:55,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:55,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:55,077 INFO L93 Difference]: Finished difference Result 12171 states and 16735 transitions. [2023-11-23 21:17:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:17:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 138 [2023-11-23 21:17:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:55,140 INFO L225 Difference]: With dead ends: 12171 [2023-11-23 21:17:55,141 INFO L226 Difference]: Without dead ends: 6552 [2023-11-23 21:17:55,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:17:55,167 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 798 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 362 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:55,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 2331 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 2181 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2023-11-23 21:17:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2023-11-23 21:17:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 6240. [2023-11-23 21:17:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6240 states, 4131 states have (on average 1.336238198983297) internal successors, (5520), 4277 states have internal predecessors, (5520), 1387 states have call successors, (1387), 686 states have call predecessors, (1387), 721 states have return successors, (1560), 1368 states have call predecessors, (1560), 1386 states have call successors, (1560) [2023-11-23 21:17:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 8467 transitions. [2023-11-23 21:17:55,705 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 8467 transitions. Word has length 138 [2023-11-23 21:17:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:55,706 INFO L495 AbstractCegarLoop]: Abstraction has 6240 states and 8467 transitions. [2023-11-23 21:17:55,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 21:17:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 8467 transitions. [2023-11-23 21:17:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-23 21:17:55,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:55,732 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:55,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:17:55,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:55,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1879548958, now seen corresponding path program 1 times [2023-11-23 21:17:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:55,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882057179] [2023-11-23 21:17:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:55,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-11-23 21:17:56,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882057179] [2023-11-23 21:17:56,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882057179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:56,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:56,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:17:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381255446] [2023-11-23 21:17:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:56,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:17:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:17:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:17:56,341 INFO L87 Difference]: Start difference. First operand 6240 states and 8467 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:17:59,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:00,608 INFO L93 Difference]: Finished difference Result 12549 states and 17114 transitions. [2023-11-23 21:18:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:18:00,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 168 [2023-11-23 21:18:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:00,658 INFO L225 Difference]: With dead ends: 12549 [2023-11-23 21:18:00,659 INFO L226 Difference]: Without dead ends: 6338 [2023-11-23 21:18:00,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:00,684 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 2 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:00,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2187 Invalid, 368 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 21:18:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6338 states. [2023-11-23 21:18:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6338 to 6304. [2023-11-23 21:18:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 4179 states have (on average 1.3323761665470208) internal successors, (5568), 4325 states have internal predecessors, (5568), 1387 states have call successors, (1387), 686 states have call predecessors, (1387), 737 states have return successors, (1584), 1384 states have call predecessors, (1584), 1386 states have call successors, (1584) [2023-11-23 21:18:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 8539 transitions. [2023-11-23 21:18:01,183 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 8539 transitions. Word has length 168 [2023-11-23 21:18:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:01,184 INFO L495 AbstractCegarLoop]: Abstraction has 6304 states and 8539 transitions. [2023-11-23 21:18:01,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:18:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 8539 transitions. [2023-11-23 21:18:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-23 21:18:01,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:01,206 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:01,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:18:01,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:01,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:01,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1792116656, now seen corresponding path program 1 times [2023-11-23 21:18:01,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:01,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483709497] [2023-11-23 21:18:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:01,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2023-11-23 21:18:02,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483709497] [2023-11-23 21:18:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483709497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275189969] [2023-11-23 21:18:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:02,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:02,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:02,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:02,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7dfe4f-b983-4cf1-b07d-3ae3f9801472/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:18:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:03,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:18:03,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 96 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2023-11-23 21:18:03,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2023-11-23 21:18:04,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275189969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:04,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125390146] [2023-11-23 21:18:04,747 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2023-11-23 21:18:04,747 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:18:04,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:18:04,757 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:18:04,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs