./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--ata--sata_sx4.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--ata--sata_sx4.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5 --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 bf59f873abe32ddc2d99221f4f189da946012506d30fecc03d275d110896ac6d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:55:57,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:55:57,973 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 18:55:57,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:55:57,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:55:58,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:55:58,032 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:55:58,033 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:55:58,034 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:55:58,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:55:58,042 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:55:58,044 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:55:58,044 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:55:58,046 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:55:58,047 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:55:58,047 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:55:58,048 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:55:58,048 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:55:58,048 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:55:58,049 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:55:58,049 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:55:58,050 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:55:58,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:55:58,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:55:58,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:55:58,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:55:58,053 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:55:58,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:55:58,054 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:55:58,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:55:58,056 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:55:58,056 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:55:58,057 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:55:58,057 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:55:58,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:55:58,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:55:58,058 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:55:58,058 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:55:58,058 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:55:58,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:55:58,059 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:55:58,059 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:55:58,059 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:55:58,059 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:55:58,060 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_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf59f873abe32ddc2d99221f4f189da946012506d30fecc03d275d110896ac6d [2023-11-21 18:55:58,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:55:58,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:55:58,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:55:58,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:55:58,411 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:55:58,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--ata--sata_sx4.ko-entry_point.cil.out.i [2023-11-21 18:56:01,638 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:56:02,271 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:56:02,272 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--ata--sata_sx4.ko-entry_point.cil.out.i [2023-11-21 18:56:02,318 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/data/ae3ecdced/cbc293f02d9d4b45b267de157e3b0e5c/FLAG9dc1b4b77 [2023-11-21 18:56:02,335 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/data/ae3ecdced/cbc293f02d9d4b45b267de157e3b0e5c [2023-11-21 18:56:02,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:56:02,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:56:02,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:02,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:56:02,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:56:02,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:02" (1/1) ... [2023-11-21 18:56:02,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c468d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:02, skipping insertion in model container [2023-11-21 18:56:02,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:56:02" (1/1) ... [2023-11-21 18:56:02,509 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:56:03,068 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [4786] [2023-11-21 18:56:03,069 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [4787-4788] [2023-11-21 18:56:03,204 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_01140dfa-9da5-4664-9e4b-818a92835a2a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--ata--sata_sx4.ko-entry_point.cil.out.i[144467,144480] [2023-11-21 18:56:03,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:03,942 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:56:04,130 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [4786] [2023-11-21 18:56:04,130 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [4787-4788] [2023-11-21 18:56:04,136 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("movl %1,%0": "=r" (ret): "m" (*((unsigned int volatile *)addr)): "memory"); [4892] [2023-11-21 18:56:04,138 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("movl %0,%1": : "r" (val), "m" (*((unsigned int volatile *)addr)): "memory"); [4899] [2023-11-21 18:56:04,142 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_01140dfa-9da5-4664-9e4b-818a92835a2a/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--ata--sata_sx4.ko-entry_point.cil.out.i[144467,144480] [2023-11-21 18:56:04,266 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [5709] [2023-11-21 18:56:04,269 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers--X--defaultlinux-3.16-rc1.tar.xz--X--43_2a--X--cpachecker/linux-3.16-rc1.tar.xz/csd_deg_dscv/11804/dscv_tempdir/dscv/ri/43_2a/drivers/ata/sata_sx4.o.c.prepared"), "i" (726), "i" (12UL)); [5738-5739] [2023-11-21 18:56:04,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:56:04,540 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:56:04,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04 WrapperNode [2023-11-21 18:56:04,541 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:56:04,542 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:56:04,543 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:56:04,543 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:56:04,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,718 INFO L138 Inliner]: procedures = 151, calls = 811, calls flagged for inlining = 86, calls inlined = 71, statements flattened = 2263 [2023-11-21 18:56:04,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:56:04,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:56:04,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:56:04,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:56:04,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,831 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:04,971 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:05,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:56:05,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:56:05,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:56:05,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:56:05,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (1/1) ... [2023-11-21 18:56:05,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:56:05,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:05,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:56:05,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:56:05,106 INFO L130 BoogieDeclarations]: Found specification of procedure pdc_prep_lba48 [2023-11-21 18:56:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc_prep_lba48 [2023-11-21 18:56:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 18:56:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-21 18:56:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-21 18:56:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 18:56:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 18:56:05,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 18:56:05,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 18:56:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 18:56:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure pdc_reset_port [2023-11-21 18:56:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc_reset_port [2023-11-21 18:56:05,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 18:56:05,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 18:56:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure pdc20621_i2c_read [2023-11-21 18:56:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc20621_i2c_read [2023-11-21 18:56:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure pdc_pkt_footer [2023-11-21 18:56:05,109 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc_pkt_footer [2023-11-21 18:56:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 18:56:05,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 18:56:05,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 18:56:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure ata_port_pbar_desc [2023-11-21 18:56:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_port_pbar_desc [2023-11-21 18:56:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 18:56:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 18:56:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2023-11-21 18:56:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2023-11-21 18:56:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 18:56:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 18:56:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 18:56:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure pdc20621_dump_hdma [2023-11-21 18:56:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc20621_dump_hdma [2023-11-21 18:56:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:56:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure __pdc20621_push_hdma [2023-11-21 18:56:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __pdc20621_push_hdma [2023-11-21 18:56:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-21 18:56:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-21 18:56:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 18:56:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 18:56:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 18:56:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2023-11-21 18:56:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2023-11-21 18:56:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 18:56:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure pdc_prep_lba28 [2023-11-21 18:56:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc_prep_lba28 [2023-11-21 18:56:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure devm_kzalloc [2023-11-21 18:56:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_kzalloc [2023-11-21 18:56:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 18:56:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 18:56:05,115 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 18:56:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-21 18:56:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-21 18:56:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2023-11-21 18:56:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2023-11-21 18:56:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2023-11-21 18:56:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2023-11-21 18:56:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:56:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure pdc20621_push_hdma [2023-11-21 18:56:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc20621_push_hdma [2023-11-21 18:56:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure pdc20621_ata_pkt [2023-11-21 18:56:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure pdc20621_ata_pkt [2023-11-21 18:56:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 18:56:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 18:56:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 18:56:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:56:05,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:56:05,634 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:56:05,637 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:56:10,296 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 18:56:15,426 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:56:17,067 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:56:17,067 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 18:56:17,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:56:17 BoogieIcfgContainer [2023-11-21 18:56:17,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:56:17,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:56:17,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:56:17,076 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:56:17,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:56:02" (1/3) ... [2023-11-21 18:56:17,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699b2eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:56:17, skipping insertion in model container [2023-11-21 18:56:17,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:56:04" (2/3) ... [2023-11-21 18:56:17,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699b2eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:56:17, skipping insertion in model container [2023-11-21 18:56:17,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:56:17" (3/3) ... [2023-11-21 18:56:17,080 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--ata--sata_sx4.ko-entry_point.cil.out.i [2023-11-21 18:56:17,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:56:17,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 18:56:17,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:56:17,198 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;@1e987ff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:56:17,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 18:56:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 247 states have (on average 1.4008097165991902) internal successors, (346), 260 states have internal predecessors, (346), 136 states have call successors, (136), 25 states have call predecessors, (136), 24 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2023-11-21 18:56:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-21 18:56:17,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:17,242 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:17,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:17,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash 304811949, now seen corresponding path program 1 times [2023-11-21 18:56:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:17,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452339888] [2023-11-21 18:56:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:17,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:18,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:18,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452339888] [2023-11-21 18:56:18,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 18:56:18,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093722796] [2023-11-21 18:56:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:18,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:56:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:18,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:56:18,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 18:56:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:19,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:56:19,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-11-21 18:56:19,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093722796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:19,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:19,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445592642] [2023-11-21 18:56:19,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:19,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:19,414 INFO L87 Difference]: Start difference. First operand has 409 states, 247 states have (on average 1.4008097165991902) internal successors, (346), 260 states have internal predecessors, (346), 136 states have call successors, (136), 25 states have call predecessors, (136), 24 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-21 18:56:21,656 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 [] [2023-11-21 18:56:23,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:25,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:27,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:29,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:31,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:33,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:35,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:37,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:39,424 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 [] [2023-11-21 18:56:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:41,061 INFO L93 Difference]: Finished difference Result 1043 states and 1558 transitions. [2023-11-21 18:56:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 196 [2023-11-21 18:56:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:41,093 INFO L225 Difference]: With dead ends: 1043 [2023-11-21 18:56:41,094 INFO L226 Difference]: Without dead ends: 634 [2023-11-21 18:56:41,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:41,114 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 377 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:41,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1000 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 9 Unknown, 0 Unchecked, 21.5s Time] [2023-11-21 18:56:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2023-11-21 18:56:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 633. [2023-11-21 18:56:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 398 states have (on average 1.3894472361809045) internal successors, (553), 411 states have internal predecessors, (553), 192 states have call successors, (192), 43 states have call predecessors, (192), 42 states have return successors, (191), 190 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-21 18:56:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 936 transitions. [2023-11-21 18:56:41,245 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 936 transitions. Word has length 196 [2023-11-21 18:56:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:41,246 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 936 transitions. [2023-11-21 18:56:41,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-21 18:56:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 936 transitions. [2023-11-21 18:56:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-11-21 18:56:41,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:41,257 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:41,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 18:56:41,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 18:56:41,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:41,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1994912489, now seen corresponding path program 1 times [2023-11-21 18:56:41,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:41,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284615855] [2023-11-21 18:56:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:41,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:41,851 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:56:41,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780721584] [2023-11-21 18:56:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:41,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:56:41,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:41,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:56:41,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 18:56:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:43,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 2588 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:56:43,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2023-11-21 18:56:43,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:43,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284615855] [2023-11-21 18:56:43,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:56:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780721584] [2023-11-21 18:56:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780721584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:43,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395244741] [2023-11-21 18:56:43,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:43,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:43,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:43,068 INFO L87 Difference]: Start difference. First operand 633 states and 936 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-21 18:56:45,366 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 [] [2023-11-21 18:56:47,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:49,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:51,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:53,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 18:56:55,418 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 [] [2023-11-21 18:56:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:56:57,767 INFO L93 Difference]: Finished difference Result 1253 states and 1854 transitions. [2023-11-21 18:56:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:56:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 235 [2023-11-21 18:56:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:56:57,777 INFO L225 Difference]: With dead ends: 1253 [2023-11-21 18:56:57,777 INFO L226 Difference]: Without dead ends: 638 [2023-11-21 18:56:57,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:57,781 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-11-21 18:56:57,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1000 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 6 Unknown, 0 Unchecked, 14.6s Time] [2023-11-21 18:56:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-11-21 18:56:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 634. [2023-11-21 18:56:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 399 states have (on average 1.3884711779448622) internal successors, (554), 412 states have internal predecessors, (554), 192 states have call successors, (192), 43 states have call predecessors, (192), 42 states have return successors, (191), 190 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-21 18:56:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 937 transitions. [2023-11-21 18:56:57,845 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 937 transitions. Word has length 235 [2023-11-21 18:56:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:56:57,846 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 937 transitions. [2023-11-21 18:56:57,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-21 18:56:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 937 transitions. [2023-11-21 18:56:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-21 18:56:57,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:56:57,854 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:56:57,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:56:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:56:58,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:56:58,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:56:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1846256511, now seen corresponding path program 1 times [2023-11-21 18:56:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:56:58,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655410813] [2023-11-21 18:56:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:56:58,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 18:56:58,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15476207] [2023-11-21 18:56:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:56:58,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:56:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:56:58,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:56:58,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01140dfa-9da5-4664-9e4b-818a92835a2a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 18:56:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:56:59,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 2790 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 18:56:59,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:56:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2023-11-21 18:56:59,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:56:59,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:56:59,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655410813] [2023-11-21 18:56:59,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 18:56:59,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15476207] [2023-11-21 18:56:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15476207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:56:59,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:56:59,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:56:59,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648770963] [2023-11-21 18:56:59,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:56:59,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:56:59,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:56:59,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:56:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:56:59,623 INFO L87 Difference]: Start difference. First operand 634 states and 937 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42)