./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:00:34,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:00:34,941 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:00:34,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:00:34,947 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:00:34,988 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:00:34,989 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:00:34,990 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:00:34,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:00:34,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:00:34,996 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:00:34,998 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:00:34,998 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:00:35,000 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:00:35,001 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:00:35,001 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:00:35,002 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:00:35,002 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:00:35,003 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:00:35,003 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:00:35,004 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:00:35,004 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:00:35,005 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:00:35,006 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:00:35,006 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:00:35,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:00:35,007 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:00:35,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:00:35,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:00:35,008 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:00:35,010 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:00:35,010 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:00:35,010 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:00:35,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:00:35,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:35,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:00:35,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:00:35,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:00:35,012 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:00:35,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:00:35,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:00:35,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:00:35,013 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:00:35,013 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:00:35,014 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_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a [2023-11-25 00:00:35,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:00:35,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:00:35,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:00:35,360 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:00:35,361 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:00:35,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2023-11-25 00:00:38,629 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:00:39,277 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:00:39,277 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2023-11-25 00:00:39,327 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/data/86ef6def5/070f901450b04a5184cd416cc09246a1/FLAG290332719 [2023-11-25 00:00:39,347 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/data/86ef6def5/070f901450b04a5184cd416cc09246a1 [2023-11-25 00:00:39,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:00:39,355 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:00:39,358 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:39,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:00:39,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:00:39,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:39" (1/1) ... [2023-11-25 00:00:39,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2662616f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:39, skipping insertion in model container [2023-11-25 00:00:39,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:39" (1/1) ... [2023-11-25 00:00:39,540 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:00:40,663 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_1de500a1-fd26-47fe-a795-c1d7563a3d02/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2023-11-25 00:00:40,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:40,736 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:00:40,911 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".section .smp_locks,\"a\"\n" ".balign 4\n" ".long 671f - .\n" ".previous\n" "671:" "\n\tlock; " "bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [4831-4837] [2023-11-25 00:00:40,913 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".section .smp_locks,\"a\"\n" ".balign 4\n" ".long 671f - .\n" ".previous\n" "671:" "\n\tlock; " "btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [4844-4850] [2023-11-25 00:00:40,914 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".section .smp_locks,\"a\"\n" ".balign 4\n" ".long 671f - .\n" ".previous\n" "671:" "\n\tlock; " "btr %2,%1\n\t" "sbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [4857-4864] [2023-11-25 00:00:40,917 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".section .smp_locks,\"a\"\n" ".balign 4\n" ".long 671f - .\n" ".previous\n" "671:" "\n\tlock; " "incl %0": "+m" (v->counter)); [4894-4900] [2023-11-25 00:00:40,918 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".section .smp_locks,\"a\"\n" ".balign 4\n" ".long 671f - .\n" ".previous\n" "671:" "\n\tlock; " "decl %0": "+m" (v->counter)); [4907-4913] [2023-11-25 00:00:41,011 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n" ".pushsection __bug_table,\"a\"\n" "2:\t.long 1b - 2b, %c0 - 2b\n" "\t.word %c1, 0\n" "\t.org 2b+%c2\n" ".popsection": : "i" ("/anthill/stuff/tacas-comp/work/current--X--drivers/net/can/usb/ems_usb.ko--X--bulklinux-3.0.1--X--68_1/linux-3.0.1/csd_deg_dscv/11/dscv_tempdir/dscv/ri/68_1/drivers/net/can/usb/ems_usb.c.common.c"), "i" (510), "i" (sizeof(struct bug_entry ))); [5717-5723] [2023-11-25 00:00:41,144 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_1de500a1-fd26-47fe-a795-c1d7563a3d02/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2023-11-25 00:00:41,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:41,420 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:00:41,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41 WrapperNode [2023-11-25 00:00:41,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:41,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:41,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:00:41,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:00:41,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,591 INFO L138 Inliner]: procedures = 133, calls = 778, calls flagged for inlining = 54, calls inlined = 44, statements flattened = 1558 [2023-11-25 00:00:41,591 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:41,592 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:00:41,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:00:41,592 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:00:41,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,617 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,691 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,738 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:00:41,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:00:41,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:00:41,773 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:00:41,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (1/1) ... [2023-11-25 00:00:41,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:41,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:00:41,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de500a1-fd26-47fe-a795-c1d7563a3d02/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:00:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-25 00:00:41,871 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-25 00:00:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_init [2023-11-25 00:00:41,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_init [2023-11-25 00:00:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-25 00:00:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-25 00:00:41,872 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-25 00:00:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-25 00:00:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-25 00:00:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:00:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2023-11-25 00:00:41,872 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2023-11-25 00:00:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2023-11-25 00:00:41,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2023-11-25 00:00:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-25 00:00:41,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-25 00:00:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-25 00:00:41,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-25 00:00:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_exit [2023-11-25 00:00:41,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_exit [2023-11-25 00:00:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-25 00:00:41,873 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-25 00:00:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-25 00:00:41,873 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-25 00:00:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-25 00:00:41,874 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-25 00:00:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:00:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-25 00:00:41,874 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-25 00:00:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2023-11-25 00:00:41,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2023-11-25 00:00:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-11-25 00:00:41,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-11-25 00:00:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-25 00:00:41,874 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-25 00:00:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2023-11-25 00:00:41,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2023-11-25 00:00:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:00:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2023-11-25 00:00:41,875 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2023-11-25 00:00:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:00:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-11-25 00:00:41,875 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-11-25 00:00:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:00:41,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2023-11-25 00:00:41,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2023-11-25 00:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-25 00:00:41,876 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-25 00:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-25 00:00:41,876 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-25 00:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:00:41,876 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2023-11-25 00:00:41,876 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2023-11-25 00:00:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-25 00:00:41,877 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-25 00:00:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-25 00:00:41,877 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-25 00:00:41,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2023-11-25 00:00:41,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2023-11-25 00:00:41,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:00:41,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:00:41,878 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-25 00:00:41,878 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-25 00:00:41,878 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-25 00:00:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-25 00:00:41,879 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-25 00:00:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-25 00:00:41,879 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2023-11-25 00:00:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2023-11-25 00:00:41,879 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-25 00:00:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-25 00:00:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-25 00:00:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-25 00:00:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-25 00:00:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-25 00:00:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-25 00:00:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-25 00:00:41,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2023-11-25 00:00:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2023-11-25 00:00:41,881 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2023-11-25 00:00:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2023-11-25 00:00:41,881 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-25 00:00:41,882 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-25 00:00:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:00:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2023-11-25 00:00:41,882 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2023-11-25 00:00:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-25 00:00:41,882 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-25 00:00:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-25 00:00:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:00:41,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:00:42,253 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:00:42,256 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:00:42,633 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2023-11-25 00:00:42,854 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-25 00:00:45,955 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !false; [2023-11-25 00:00:45,955 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume false; [2023-11-25 00:00:46,004 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:00:46,476 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:00:46,476 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-25 00:00:46,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:46 BoogieIcfgContainer [2023-11-25 00:00:46,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:00:46,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:00:46,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:00:46,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:00:46,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:00:39" (1/3) ... [2023-11-25 00:00:46,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ef43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:46, skipping insertion in model container [2023-11-25 00:00:46,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:41" (2/3) ... [2023-11-25 00:00:46,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ef43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:46, skipping insertion in model container [2023-11-25 00:00:46,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:46" (3/3) ... [2023-11-25 00:00:46,488 INFO L112 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2023-11-25 00:00:46,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:00:46,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:00:46,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:00:46,607 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;@2c9f5ad5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:00:46,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:00:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 382 states, 231 states have (on average 1.3463203463203464) internal successors, (311), 243 states have internal predecessors, (311), 112 states have call successors, (112), 38 states have call predecessors, (112), 37 states have return successors, (110), 108 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-25 00:00:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:00:46,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:46,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:46,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:46,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 17771108, now seen corresponding path program 1 times [2023-11-25 00:00:46,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:46,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490909818] [2023-11-25 00:00:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:46,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:48,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490909818] [2023-11-25 00:00:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490909818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:48,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:48,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:00:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720336105] [2023-11-25 00:00:48,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:00:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:00:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:00:48,520 INFO L87 Difference]: Start difference. First operand has 382 states, 231 states have (on average 1.3463203463203464) internal successors, (311), 243 states have internal predecessors, (311), 112 states have call successors, (112), 38 states have call predecessors, (112), 37 states have return successors, (110), 108 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:00:53,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:00:54,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:00:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:55,832 INFO L93 Difference]: Finished difference Result 761 states and 1081 transitions. [2023-11-25 00:00:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:00:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-25 00:00:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:55,850 INFO L225 Difference]: With dead ends: 761 [2023-11-25 00:00:55,850 INFO L226 Difference]: Without dead ends: 385 [2023-11-25 00:00:55,857 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 [2023-11-25 00:00:55,860 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 209 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:55,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1521 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-25 00:00:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-25 00:00:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 380. [2023-11-25 00:00:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 232 states have (on average 1.2844827586206897) internal successors, (298), 240 states have internal predecessors, (298), 110 states have call successors, (110), 37 states have call predecessors, (110), 37 states have return successors, (107), 105 states have call predecessors, (107), 106 states have call successors, (107) [2023-11-25 00:00:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 515 transitions. [2023-11-25 00:00:55,944 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 515 transitions. Word has length 16 [2023-11-25 00:00:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:55,945 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 515 transitions. [2023-11-25 00:00:55,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:00:55,946 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 515 transitions. [2023-11-25 00:00:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:00:55,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:55,948 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:55,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:00:55,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:55,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -39075882, now seen corresponding path program 1 times [2023-11-25 00:00:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:55,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433690628] [2023-11-25 00:00:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:00:57,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433690628] [2023-11-25 00:00:57,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433690628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:57,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:57,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:57,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914397268] [2023-11-25 00:00:57,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:57,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:57,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:57,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:57,011 INFO L87 Difference]: Start difference. First operand 380 states and 515 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:01:01,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:02,077 INFO L93 Difference]: Finished difference Result 958 states and 1295 transitions. [2023-11-25 00:01:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-11-25 00:01:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:02,084 INFO L225 Difference]: With dead ends: 958 [2023-11-25 00:01:02,085 INFO L226 Difference]: Without dead ends: 594 [2023-11-25 00:01:02,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:02,118 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 291 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:02,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 883 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-25 00:01:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-11-25 00:01:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 590. [2023-11-25 00:01:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 361 states have (on average 1.293628808864266) internal successors, (467), 372 states have internal predecessors, (467), 165 states have call successors, (165), 64 states have call predecessors, (165), 63 states have return successors, (162), 156 states have call predecessors, (162), 161 states have call successors, (162) [2023-11-25 00:01:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 794 transitions. [2023-11-25 00:01:02,214 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 794 transitions. Word has length 20 [2023-11-25 00:01:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 794 transitions. [2023-11-25 00:01:02,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:01:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 794 transitions. [2023-11-25 00:01:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-25 00:01:02,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:02,217 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:02,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:01:02,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:02,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1211615007, now seen corresponding path program 1 times [2023-11-25 00:01:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:02,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727217739] [2023-11-25 00:01:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:01:03,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727217739] [2023-11-25 00:01:03,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727217739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:03,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:03,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:03,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829621351] [2023-11-25 00:01:03,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:03,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:03,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:03,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:03,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:03,237 INFO L87 Difference]: Start difference. First operand 590 states and 794 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:01:04,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:07,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:09,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:11,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:13,367 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 [] [2023-11-25 00:01:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:13,386 INFO L93 Difference]: Finished difference Result 869 states and 1166 transitions. [2023-11-25 00:01:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-25 00:01:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:13,394 INFO L225 Difference]: With dead ends: 869 [2023-11-25 00:01:13,394 INFO L226 Difference]: Without dead ends: 860 [2023-11-25 00:01:13,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:13,396 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 376 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:13,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 880 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 3 Unknown, 0 Unchecked, 10.1s Time] [2023-11-25 00:01:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-11-25 00:01:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 851. [2023-11-25 00:01:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 521 states have (on average 1.2859884836852207) internal successors, (670), 533 states have internal predecessors, (670), 239 states have call successors, (239), 93 states have call predecessors, (239), 90 states have return successors, (235), 226 states have call predecessors, (235), 235 states have call successors, (235) [2023-11-25 00:01:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1144 transitions. [2023-11-25 00:01:13,452 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1144 transitions. Word has length 21 [2023-11-25 00:01:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:13,452 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1144 transitions. [2023-11-25 00:01:13,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-25 00:01:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1144 transitions. [2023-11-25 00:01:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:01:13,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:13,457 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:13,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:01:13,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:13,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 136014366, now seen corresponding path program 1 times [2023-11-25 00:01:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:13,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975929091] [2023-11-25 00:01:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:01:14,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975929091] [2023-11-25 00:01:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975929091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:14,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:14,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992774994] [2023-11-25 00:01:14,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:14,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:14,328 INFO L87 Difference]: Start difference. First operand 851 states and 1144 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-25 00:01:17,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:17,332 INFO L93 Difference]: Finished difference Result 2073 states and 2891 transitions. [2023-11-25 00:01:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-25 00:01:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:17,345 INFO L225 Difference]: With dead ends: 2073 [2023-11-25 00:01:17,346 INFO L226 Difference]: Without dead ends: 1233 [2023-11-25 00:01:17,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:17,350 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 187 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:17,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 915 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-25 00:01:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-11-25 00:01:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1224. [2023-11-25 00:01:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 766 states have (on average 1.318537859007833) internal successors, (1010), 786 states have internal predecessors, (1010), 367 states have call successors, (367), 93 states have call predecessors, (367), 90 states have return successors, (363), 348 states have call predecessors, (363), 363 states have call successors, (363) [2023-11-25 00:01:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1740 transitions. [2023-11-25 00:01:17,446 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1740 transitions. Word has length 58 [2023-11-25 00:01:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:17,446 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1740 transitions. [2023-11-25 00:01:17,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-25 00:01:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1740 transitions. [2023-11-25 00:01:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-25 00:01:17,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:17,452 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:01:17,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:01:17,452 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:17,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1442499822, now seen corresponding path program 1 times [2023-11-25 00:01:17,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:17,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347832853] [2023-11-25 00:01:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:17,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:01:19,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:19,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347832853] [2023-11-25 00:01:19,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347832853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:19,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:19,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:01:19,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217707822] [2023-11-25 00:01:19,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:19,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:01:19,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:19,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:01:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:19,091 INFO L87 Difference]: Start difference. First operand 1224 states and 1740 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:01:20,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:21,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:25,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:29,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:30,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:31,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-25 00:01:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:31,926 INFO L93 Difference]: Finished difference Result 2472 states and 3526 transitions. [2023-11-25 00:01:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:01:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2023-11-25 00:01:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:31,944 INFO L225 Difference]: With dead ends: 2472 [2023-11-25 00:01:31,944 INFO L226 Difference]: Without dead ends: 1552 [2023-11-25 00:01:31,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:01:31,950 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 836 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:31,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 994 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2023-11-25 00:01:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2023-11-25 00:01:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1535. [2023-11-25 00:01:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 963 states have (on average 1.3177570093457944) internal successors, (1269), 986 states have internal predecessors, (1269), 455 states have call successors, (455), 120 states have call predecessors, (455), 116 states have return successors, (451), 432 states have call predecessors, (451), 451 states have call successors, (451) [2023-11-25 00:01:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2175 transitions. [2023-11-25 00:01:32,173 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2175 transitions. Word has length 57 [2023-11-25 00:01:32,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:32,176 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 2175 transitions. [2023-11-25 00:01:32,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:01:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2175 transitions. [2023-11-25 00:01:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-25 00:01:32,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:32,184 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:01:32,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:01:32,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:32,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash -865600166, now seen corresponding path program 1 times [2023-11-25 00:01:32,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:32,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631100760] [2023-11-25 00:01:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:32,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-25 00:01:33,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631100760] [2023-11-25 00:01:33,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631100760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:33,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:33,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:01:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103864489] [2023-11-25 00:01:33,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:01:33,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:33,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:01:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:01:33,980 INFO L87 Difference]: Start difference. First operand 1535 states and 2175 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9)